Re: Re: hex conversion [7:40437]
On Wed, 3 Apr 2002, Howard C. Berkowitz ([EMAIL PROTECTED]) wrote: > Well, if you count not just on your fingers but include your eyes, > ears, and nostrils, you can always count to 16. > > The proctor would really have trouble excluding THAT calculator from the > lab. > > I'm tired at the end of a long day, but the trick, if there is one, > is REALLY being able to understand binary. Being able to think > binary makes CIDR/VLSM addressing much easier, and hex trivial -- > just count off groups of 4 bits. > > Octal, which used to be popular on DEC machines, was just plain weird > when you had to deal with multiples of 8 bits. > I used to know a guy who argued that we should all use base12 instead of base10. I understand there's a whole 'society' of those people around. :-) Now _that_ was an interesting guy to talk to! Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=40439&t=40437 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: hex conversion [7:40437]
Well, if you count not just on your fingers but include your eyes, ears, and nostrils, you can always count to 16. The proctor would really have trouble excluding THAT calculator from the lab. I'm tired at the end of a long day, but the trick, if there is one, is REALLY being able to understand binary. Being able to think binary makes CIDR/VLSM addressing much easier, and hex trivial -- just count off groups of 4 bits. Octal, which used to be popular on DEC machines, was just plain weird when you had to deal with multiples of 8 bits. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=40437&t=40437 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Hex to Decimal for the RD [7:38223]
At 09:01 AM 3/14/02, Mckenzie Bill wrote: >Could someone help me get a clear understanding of converting the hex number >to a nice decimal ring number or bridge number. > >Two examples that have me stumped are: > >F00 and 2f2. Why would just those two numbers have you stumped? If you can do any number, then you can do them all, it seems to me. Were those the ones on the test? ;-) The only weird thing that you might not know, but certainly should know, is that a number can only be one digit, so decimal to hex is: 1 = 1 2 = 2 3 = 3 4 = 4 5 = 5 6 = 6 7 = 7 8 = 8 9 = 9 10 = A 11 = B 12 = C 13 = D 14 = E 15 = F I still remember the first time I heard an IBM customer engineer talk in Able Baker Charley, etc. language. I thought he had gone off his rocker. Other than that, you just have to know what each number place means. On the right, 16^0 = the ones (just like 10^0 = the ones in decimal). 16^1 is the next place. 16^2 is the next and so on. It's no different than decimal, except that you're dealing with groups of 16 instead of 10. Priscilla >Thanks Everyone in advance. Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38304&t=38223 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Hex to Decimal for the RD [7:38223]
Thats easy, just integer divide the decimal number by 16 and put the remainder in the first column. Keep dividing by 16 and placing the remainder in the next column moving right to left until you have a number less than 16 and place it in the left-most column. For example: 873 = 0x369 873/16=54, r9 54/16= 3, r6 3/16= 0, r3 HTH, Prof. Tom Lisa, CCAI Community College of Southern Nevada Cisco ATC/Regional Networking Academy Persio Pucci wrote: > Nice going, Ole! > > Now, how about an easy way to convert decimal to hex without going through > binary (the way I learned)? :) > > Persio > > - Original Message - > From: "Ole Drews Jensen" > To: > Sent: Thursday, March 14, 2002 12:07 PM > Subject: RE: Hex to Decimal for the RD [7:38223] > > > Hex is based on 16, where Dec is based on 10. > > > > When you see a value, no matter if it's in dec, hex, bin, or something > else, > > think of each number as being number 0 (the right one), 1, 2, 3, and so > on. > > > > If you for instance have the decimal value 579: > > > > Number 0 would be 9 > > Number 1 would be 7 > > Number 2 would be 5 > > > > When you have decimal, the system is based on 10, so you will have to use > 10 > > to calculate your way to a result. > > > > The number 579 can be calculated this way: > > > >9 * 10^0 = 9 > > + > >7 * 10^1 = 70 > > + > >5 * 10^2 = 500 > > = > >Result = 579 > > > > This seems pretty silly to calculate a value like that, but that's because > > we're used to see the value in a 10-based format. > > > > Okay, let's take your first 16-based (hex) value - F00. > > > > Again, from right to left: > > > > Number 0 is 0 > > Number 1 is 0 > > Number 2 is F (15 in decimal) > > > > Instead of using the number 10 to calculate, you will need to use the > number > > 16 to calculate: > > > > The value F00 in hex can be calculated this way: > > > >0 * 16^0 =0 > > + > >0 * 16^1 =0 > > + > >F * 16^2 = 3840 > > = > >Result = 3840 > > > > You can with hex make words if that helps you remember the value, as long > as > > you do not use letters above F. > > > > For instance, the value ABBA would be a good one to use for a Swedish > > Ericsson Server (if they exist), and the value would be calculated like > > this: > > > >A * 16^0 =10 > > + > >B * 16^1 = 176 > > + > >B * 16^2 = 2816 > > + > >A * 16^3 = 40960 > > = > >Result = 43962 > > > > If this is still a little confusing, the let's continue with your second > > value, and break it up a little more: > > > > 2F2 > > > > First number is 2 (2 decimal) which must be multiplied by 16^0 (1). > > > > The result is 2. > > > > Second number is F (15 decimal) which must be multiplied by 16^1 (16). > > > > The result is 240. > > > > The third number is 2 (2 decimal) which must be multiplied by 16^2 (256). > > > > The result is 512. > > > > The final result will therefore give us 2+240+512 = 754 decimal. > > > > Conversions between all systems other than decimal is much easier, because > > they are based on what I call double up. If you start with binary. Binary > is > > based on 2. When you double up, you will get 4. Next time you will get 8. > 8 > > is the number that Octal is based on, but that's not used much anymore. > Next > > time you will get 16. 16 is the number that Hex is based on. > > > > Now, you can see that going from hex to binary will be easier. Hex numbers > > goes from 0 to 15, and binary goes from 0 to 1. So that means that four > > binary numbers matches one hex number. > > > > An example: > > > > The hex number F00 again. If you take each number and convert it to > binary, > > it is much easier. > > > > 0 = > > 0 = > > F = > > > > Result = > > > > You can now convert the binary number to octal, which is based on three > > binary numbers instead of four. > > > > First, put spaces in between every third to make it easier: > > > > 111 100 000 000 > > > > You can see that it is the same binary number as above, but it looks > > different now. > > > > Now convert to Octal: > > > > 000 = 0 > > 000 = 0 > > 100 = 4 > > 111 = 7 > > >
RE: Hex to Decimal for the RD [7:38223]
Thanks, Now you have to remember the DIV and MOD calculation you learned in school. First, learn the values of each of the hex numbers. If we take a max of four hex numbers (1 word, 2 bytes, 16 bits, etc.) you have the following: 16^3 16^2 16^1 16^0 Doing a fast calculation gives us: 4096 256 16 1 That means that 1000 hex is 4096 dec. Got that? - Good! With four numbers, you will have the range of to or 0 to 65535. So if you have the decimal number 5000, you do the following: Step 1: How many times does 4096 fit into 5000? Answer = 1 Step 2: What's left? Answer = 904 Step 3: How many times does 256 fit into 904? Answer = 3 Step 4: What's left? Answer = 136 Step 5: How many times does 16 fit into 136? Answer = 8 Step 6: What's left? Answer = 8 RESULT = 1388 hex is the same as 5000 dec. Here's a practice story for you :-) The 2750 with the 2989 64206 got a 3053 at the old 51966 where 43962 used to 190. Hth, Ole ~~~ Ole Drews Jensen Systems Network Manager CCNP, MCSE, MCP+I RWR Enterprises, Inc. [EMAIL PROTECTED] ~~~ http://www.RouterChief.com ~~~ NEED A JOB ??? http://www.oledrews.com/job ~~~ -Original Message- From: Persio Pucci [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 14, 2002 11:06 AM To: [EMAIL PROTECTED] Subject: Re: Hex to Decimal for the RD [7:38223] Nice going, Ole! Now, how about an easy way to convert decimal to hex without going through binary (the way I learned)? :) Persio - Original Message - From: "Ole Drews Jensen" To: Sent: Thursday, March 14, 2002 12:07 PM Subject: RE: Hex to Decimal for the RD [7:38223] > Hex is based on 16, where Dec is based on 10. > > When you see a value, no matter if it's in dec, hex, bin, or something else, > think of each number as being number 0 (the right one), 1, 2, 3, and so on. > > If you for instance have the decimal value 579: > > Number 0 would be 9 > Number 1 would be 7 > Number 2 would be 5 > > When you have decimal, the system is based on 10, so you will have to use 10 > to calculate your way to a result. > > The number 579 can be calculated this way: > >9 * 10^0 = 9 > + >7 * 10^1 = 70 > + >5 * 10^2 = 500 > = >Result = 579 > > This seems pretty silly to calculate a value like that, but that's because > we're used to see the value in a 10-based format. > > Okay, let's take your first 16-based (hex) value - F00. > > Again, from right to left: > > Number 0 is 0 > Number 1 is 0 > Number 2 is F (15 in decimal) > > Instead of using the number 10 to calculate, you will need to use the number > 16 to calculate: > > The value F00 in hex can be calculated this way: > >0 * 16^0 =0 > + >0 * 16^1 =0 > + >F * 16^2 = 3840 > = >Result = 3840 > > You can with hex make words if that helps you remember the value, as long as > you do not use letters above F. > > For instance, the value ABBA would be a good one to use for a Swedish > Ericsson Server (if they exist), and the value would be calculated like > this: > >A * 16^0 =10 > + >B * 16^1 = 176 > + >B * 16^2 = 2816 > + >A * 16^3 = 40960 > = >Result = 43962 > > If this is still a little confusing, the let's continue with your second > value, and break it up a little more: > > 2F2 > > First number is 2 (2 decimal) which must be multiplied by 16^0 (1). > > The result is 2. > > Second number is F (15 decimal) which must be multiplied by 16^1 (16). > > The result is 240. > > The third number is 2 (2 decimal) which must be multiplied by 16^2 (256). > > The result is 512. > > The final result will therefore give us 2+240+512 = 754 decimal. > > Conversions between all systems other than decimal is much easier, because > they are based on what I call double up. If you start with binary. Binary is > based on 2. When you double up, you will get 4. Next time you will get 8. 8 > is the number that Octal is based on, but that's not used much anymore. Next > time you will get 16. 16 is the number that Hex is based on. > > Now, you can see that going from hex to binary will be easier. Hex numbers > goes from 0 to 15, and binary goes from 0 to 1. So that means that four > binary numbers matches one hex number. > > An example: > > The hex number F00 again. If you take each number and convert it to binary, > it is much easier. > > 0 = > 0 = > F = > > Result = > > You can now convert the binary
Re: Hex to Decimal for the RD [7:38223]
All very good but an easier route is to configure the ring numbers in hex; the router will give the decimal equivalents. int tok 0 ring 16 source-bridge 0xf00 2 0x2f2 will appear as int tok 0 ring 16 source-bridge 3840 2 754 Fred. Kelly Cobean wrote: > > Bill, >Hex is equivalent to Base16 numbering. Decimal is really Base10 > numbering. Let's look at an example of Base10 numbering broken down into > it's components, then we'll tackle your examples.. > > The decimal number 4243 drawn out in Base10 is as follows: > (4x10^3) + (2x10^2) + (4x10^1) + (3x10^0) ... Let's do the math... > 4x1000 + 2x100 + 4x10 + 3x1 = 4243 > > Simple, right? So hex is exactly the same, except you use powers of 16 and > the letters A-F map to numbers 10-15 respectively. Let's do your > examples... > F00: > Fx16^2 + 0x16^1 + 0x16^0 ...Let's do the math... > 15x256 + 0x16 + 0x1 = 3840 ...Voila! Youve just converted Hex to > decimal. > > Now how does that give us the Ring/Bridge #'s?...First, you need to > understand that the Route Descriptor is broken down like this: > > , where R=Ring# and B=Bridge# > > Given that FOO in Binary is only 12 bits but the field above is 16 bits, we > have to pad the left side with 0's so as not to change the value (Though > it's not displayed this way.) This makes it 0x0F00. In binary, this is: > > 0x0F00 = This means that the Ring is and the > Bridge is when you break the fields apart. > Convert this binary back to decimal, you get Ring#=3840, Bridge#=0, (The > bridge bits set to all 0's means "the ring local to the destination). Valid > bridge #'s are 1-15. > > Your second example: > 2F2 = 0x02F2 = 00100010 = Ring 0010 / Bridge 0010 = Ring# > 47/Bridge# 2 > > If you had a RIF that read 0810.02F2.0F00, then the RIF would translate to > this: > 0810(Routing control bits).Ring47/Bridge2.Ring3840/Bridge0(or ring local to > destination) > > Hope this helps. > > Kelly Cobean, CCNP, CCSA, ACSA, MCSE, MCP+I > Network Engineer > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > Mckenzie Bill > Sent: Thursday, March 14, 2002 9:02 AM > To: [EMAIL PROTECTED] > Subject: Hex to Decimal for the RD [7:38223] > > Could someone help me get a clear understanding of converting the hex number > to a nice decimal ring number or bridge number. > > Two examples that have me stumped are: > > F00 and 2f2. > > Thanks Everyone in advance. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38264&t=38223 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Hex to Decimal for the RD [7:38223]
Nice going, Ole! Now, how about an easy way to convert decimal to hex without going through binary (the way I learned)? :) Persio - Original Message - From: "Ole Drews Jensen" To: Sent: Thursday, March 14, 2002 12:07 PM Subject: RE: Hex to Decimal for the RD [7:38223] > Hex is based on 16, where Dec is based on 10. > > When you see a value, no matter if it's in dec, hex, bin, or something else, > think of each number as being number 0 (the right one), 1, 2, 3, and so on. > > If you for instance have the decimal value 579: > > Number 0 would be 9 > Number 1 would be 7 > Number 2 would be 5 > > When you have decimal, the system is based on 10, so you will have to use 10 > to calculate your way to a result. > > The number 579 can be calculated this way: > >9 * 10^0 = 9 > + >7 * 10^1 = 70 > + >5 * 10^2 = 500 > = >Result = 579 > > This seems pretty silly to calculate a value like that, but that's because > we're used to see the value in a 10-based format. > > Okay, let's take your first 16-based (hex) value - F00. > > Again, from right to left: > > Number 0 is 0 > Number 1 is 0 > Number 2 is F (15 in decimal) > > Instead of using the number 10 to calculate, you will need to use the number > 16 to calculate: > > The value F00 in hex can be calculated this way: > >0 * 16^0 =0 > + >0 * 16^1 =0 > + >F * 16^2 = 3840 > = >Result = 3840 > > You can with hex make words if that helps you remember the value, as long as > you do not use letters above F. > > For instance, the value ABBA would be a good one to use for a Swedish > Ericsson Server (if they exist), and the value would be calculated like > this: > >A * 16^0 =10 > + >B * 16^1 = 176 > + >B * 16^2 = 2816 > + >A * 16^3 = 40960 > = >Result = 43962 > > If this is still a little confusing, the let's continue with your second > value, and break it up a little more: > > 2F2 > > First number is 2 (2 decimal) which must be multiplied by 16^0 (1). > > The result is 2. > > Second number is F (15 decimal) which must be multiplied by 16^1 (16). > > The result is 240. > > The third number is 2 (2 decimal) which must be multiplied by 16^2 (256). > > The result is 512. > > The final result will therefore give us 2+240+512 = 754 decimal. > > Conversions between all systems other than decimal is much easier, because > they are based on what I call double up. If you start with binary. Binary is > based on 2. When you double up, you will get 4. Next time you will get 8. 8 > is the number that Octal is based on, but that's not used much anymore. Next > time you will get 16. 16 is the number that Hex is based on. > > Now, you can see that going from hex to binary will be easier. Hex numbers > goes from 0 to 15, and binary goes from 0 to 1. So that means that four > binary numbers matches one hex number. > > An example: > > The hex number F00 again. If you take each number and convert it to binary, > it is much easier. > > 0 = > 0 = > F = > > Result = > > You can now convert the binary number to octal, which is based on three > binary numbers instead of four. > > First, put spaces in between every third to make it easier: > > 111 100 000 000 > > You can see that it is the same binary number as above, but it looks > different now. > > Now convert to Octal: > > 000 = 0 > 000 = 0 > 100 = 4 > 111 = 7 > > Octal result = 7400 > > Some people prefer to use binary when converting from hex to decimal. > > Again, let's take the F00. > > >From Hex to Bin: > > F 0 0 = > > Let's split the binary numbers up: > > 0 * 2^0 (1) = 0 > 0 * 2^1 (2) = 0 > 0 * 2^2 (4) = 0 > 0 * 2^3 (8) = 0 > 0 * 2^4 (16) = 0 > 0 * 2^5 (32) = 0 > 0 * 2^6 (64) = 0 > 0 * 2^7 (128) = 0 > 1 * 2^8 (256) = 256 > 1 * 2^9 (512) = 512 > 1 * 2^10 (1024) = 1024 > 1 * 2^11 (2048) = 2048 > > RESULT = 3840 > > > If you look at the first calculation we did in the beginning, you can see > that I came to the same result. > > Hth, > > Ole > > ~~~ > Ole Drews Jensen > Systems Network Manager > CCNP, MCSE, MCP+I > RWR Enterprises, Inc. > [EMAIL PROTECTED] > ~~~ > http://www.RouterChief.com > ~~~ > NEED A JOB ??? > http://www.oledrews.com/job > ~~~ > > > > > > -Original Message- > From: Mckenzie Bill [
RE: Hex to Decimal for the RD [7:38223]
Bill, Hex is equivalent to Base16 numbering. Decimal is really Base10 numbering. Let's look at an example of Base10 numbering broken down into it's components, then we'll tackle your examples.. The decimal number 4243 drawn out in Base10 is as follows: (4x10^3) + (2x10^2) + (4x10^1) + (3x10^0) ... Let's do the math... 4x1000 + 2x100 + 4x10 + 3x1 = 4243 Simple, right? So hex is exactly the same, except you use powers of 16 and the letters A-F map to numbers 10-15 respectively. Let's do your examples... F00: Fx16^2 + 0x16^1 + 0x16^0 ...Let's do the math... 15x256 + 0x16 + 0x1 = 3840 ...Voila! Youve just converted Hex to decimal. Now how does that give us the Ring/Bridge #'s?...First, you need to understand that the Route Descriptor is broken down like this: , where R=Ring# and B=Bridge# Given that FOO in Binary is only 12 bits but the field above is 16 bits, we have to pad the left side with 0's so as not to change the value (Though it's not displayed this way.) This makes it 0x0F00. In binary, this is: 0x0F00 = This means that the Ring is and the Bridge is when you break the fields apart. Convert this binary back to decimal, you get Ring#=3840, Bridge#=0, (The bridge bits set to all 0's means "the ring local to the destination). Valid bridge #'s are 1-15. Your second example: 2F2 = 0x02F2 = 00100010 = Ring 0010 / Bridge 0010 = Ring# 47/Bridge# 2 If you had a RIF that read 0810.02F2.0F00, then the RIF would translate to this: 0810(Routing control bits).Ring47/Bridge2.Ring3840/Bridge0(or ring local to destination) Hope this helps. Kelly Cobean, CCNP, CCSA, ACSA, MCSE, MCP+I Network Engineer -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mckenzie Bill Sent: Thursday, March 14, 2002 9:02 AM To: [EMAIL PROTECTED] Subject: Hex to Decimal for the RD [7:38223] Could someone help me get a clear understanding of converting the hex number to a nice decimal ring number or bridge number. Two examples that have me stumped are: F00 and 2f2. Thanks Everyone in advance. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38245&t=38223 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Hex to Decimal for the RD [7:38223]
Hex is based on 16, where Dec is based on 10. When you see a value, no matter if it's in dec, hex, bin, or something else, think of each number as being number 0 (the right one), 1, 2, 3, and so on. If you for instance have the decimal value 579: Number 0 would be 9 Number 1 would be 7 Number 2 would be 5 When you have decimal, the system is based on 10, so you will have to use 10 to calculate your way to a result. The number 579 can be calculated this way: 9 * 10^0 = 9 + 7 * 10^1 = 70 + 5 * 10^2 = 500 = Result = 579 This seems pretty silly to calculate a value like that, but that's because we're used to see the value in a 10-based format. Okay, let's take your first 16-based (hex) value - F00. Again, from right to left: Number 0 is 0 Number 1 is 0 Number 2 is F (15 in decimal) Instead of using the number 10 to calculate, you will need to use the number 16 to calculate: The value F00 in hex can be calculated this way: 0 * 16^0 =0 + 0 * 16^1 =0 + F * 16^2 = 3840 = Result = 3840 You can with hex make words if that helps you remember the value, as long as you do not use letters above F. For instance, the value ABBA would be a good one to use for a Swedish Ericsson Server (if they exist), and the value would be calculated like this: A * 16^0 =10 + B * 16^1 = 176 + B * 16^2 = 2816 + A * 16^3 = 40960 = Result = 43962 If this is still a little confusing, the let's continue with your second value, and break it up a little more: 2F2 First number is 2 (2 decimal) which must be multiplied by 16^0 (1). The result is 2. Second number is F (15 decimal) which must be multiplied by 16^1 (16). The result is 240. The third number is 2 (2 decimal) which must be multiplied by 16^2 (256). The result is 512. The final result will therefore give us 2+240+512 = 754 decimal. Conversions between all systems other than decimal is much easier, because they are based on what I call double up. If you start with binary. Binary is based on 2. When you double up, you will get 4. Next time you will get 8. 8 is the number that Octal is based on, but that's not used much anymore. Next time you will get 16. 16 is the number that Hex is based on. Now, you can see that going from hex to binary will be easier. Hex numbers goes from 0 to 15, and binary goes from 0 to 1. So that means that four binary numbers matches one hex number. An example: The hex number F00 again. If you take each number and convert it to binary, it is much easier. 0 = 0 = F = Result = You can now convert the binary number to octal, which is based on three binary numbers instead of four. First, put spaces in between every third to make it easier: 111 100 000 000 You can see that it is the same binary number as above, but it looks different now. Now convert to Octal: 000 = 0 000 = 0 100 = 4 111 = 7 Octal result = 7400 Some people prefer to use binary when converting from hex to decimal. Again, let's take the F00. >From Hex to Bin: F 0 0 = Let's split the binary numbers up: 0 * 2^0 (1) = 0 0 * 2^1 (2) = 0 0 * 2^2 (4) = 0 0 * 2^3 (8) = 0 0 * 2^4 (16)= 0 0 * 2^5 (32)= 0 0 * 2^6 (64)= 0 0 * 2^7 (128) = 0 1 * 2^8 (256) = 256 1 * 2^9 (512) = 512 1 * 2^10 (1024) = 1024 1 * 2^11 (2048) = 2048 RESULT = 3840 If you look at the first calculation we did in the beginning, you can see that I came to the same result. Hth, Ole ~~~ Ole Drews Jensen Systems Network Manager CCNP, MCSE, MCP+I RWR Enterprises, Inc. [EMAIL PROTECTED] ~~~ http://www.RouterChief.com ~~~ NEED A JOB ??? http://www.oledrews.com/job ~~~ -Original Message- From: Mckenzie Bill [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 14, 2002 8:02 AM To: [EMAIL PROTECTED] Subject: Hex to Decimal for the RD [7:38223] Could someone help me get a clear understanding of converting the hex number to a nice decimal ring number or bridge number. Two examples that have me stumped are: F00 and 2f2. Thanks Everyone in advance. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38238&t=38223 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EM
Re: Hex to Decimal for the RD [7:38223]
Not sure what you mean, I just use a calculator F00 = 3840 2F2 = 754 dave Mckenzie Bill wrote: > > Could someone help me get a clear understanding of converting the hex number > to a nice decimal ring number or bridge number. > > Two examples that have me stumped are: > > F00 and 2f2. > > Thanks Everyone in advance. -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38234&t=38223 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Hex to Decimal for the RD [7:38223]
the place values for base 16 numbering starting from right to left are 16^0, 16^1,16^2,16^3, etc. In case your wondering 16^1 means 16 to the power of 1, or just 16. Like wise 16^3 = 16 * 16 * 16. So if you hex value is 2f2, starting with the right most 2, (16^0 * 2)+ (16^1 * 15) + (16^2 * 2). Which breaks down to 2+240+512= 754 in base 10. Also hex digits are 0-9, A=10, B=11,C=12,D=13,E=14,F=15. Hope this helps if you still need clarification let me know, I just took a hudge math coarse last semester and this stuff is still floating around in my head. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38233&t=38223 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HEX
As President of the OGC, I would like to add an additional point. Your exam time limit doesn't start until you click on the button. That means you can take all the time you want to write out all the conversions on the scratch paper they give before you start the test! I find trying to do these conversions extra difficult when I'm worrying if I'll have enough time to finish the exam. Tom Lisa President, Groupstudy OGC (Self-Appointed) "Hartnell, George" wrote: > That Priscilla is a real jewel, eh? I think I'll add this formula to my > *must know* list. > > The one tid-bit I might include, though not reputed to be 'test centric', is > to *memorize* (I say this as a member in good standing of the O)ld G)eezer's > C)lub) the binary numeric for HEX digits. The 'weight' of the bits logic > has helped me out a few times An interesting math trick, 16^4 is > ()+1 or ( )+1. Note that 2^16=16^4=1 > binary=0x1 hex. They all reach the same number. It took this 52 > year-old maybe a week of practice to 'grok this in it's fullness'. Just my > way of figgerin' it out. There are others. > > It is delightful to hear of someone who hasn't fired up the scientific side > of that Windows accessory for this kind of math. I've been helpless without > that hex/bin calculator for years. The memorization/concept isn't that > hard, though, and, really, CCxx's should, as advertised, be able to do this, > 'in your head'. > > Best, G. > > -Original Message- > From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] > Sent: Friday, March 02, 2001 4:27 PM > To: [EMAIL PROTECTED] > Subject: RE: HEX > > I never even knew the Windows Accessories calculator converted to hex! I > just do it manually. I have the following numbers and letters pretty much > memorized, so that helps. > > 10 = A > 11 = B > 12 = C > 13 = D > 14 = E > 15 = F > > 16^0 = 1 > 16^1 = 16 > 16^2 = 256 > 16^3 = 4096 > 16^4 = 65536 > > Figure out where the number they give you falls in the above list, for > example, is it between 256 and 4096? Or between 4096 and 65536? Divide by > the smaller of the numbers you select. Keep dividing the remainders until > you run out of numbers, (or can select the right answer, it is multiple > choice after all!) > > Here's an example: Convert to Hex. Easy! > > Divide by 4096 = 1, remainder = 1459 > Divide 1459 by 256 = 5, remainder = 179 > Divide 179 by 16= B, remainder = 3 > Divide 3 by 1 = 3 > > Answer = 15B3 > > Note: a few things made this example easy. divided by 4096 is > obviously 1. 256 x 5 is obviously 1280. 16 x 11 is obviously 176. Often > it's much easier than it seems. (Sometimes, it's not and you just do brute > force.) > > Priscilla > > At 09:26 AM 3/2/01, Dale Frohman wrote: > >exactly. I had a friend who told me there was some HEX conversions on the > >BCMSN exam which i am scheduled to take in a couple of weeks. > > > >On Fri, 2 Mar 2001, Barronton, Ken wrote: > > > > > Because you can't use it during an exam. Real life...OK, exam...NO. > > > > > > -Original Message- > > > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > > > Sent: Friday, March 02, 2001 6:27 AM > > > To: 'Dale Frohman' > > > Cc: [EMAIL PROTECTED] > > > Subject: RE: HEX > > > > > > > > > Why don't you use the calculator of windows accesories? > > > > > > -Mensaje original- > > > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > > > Dale Frohman > > > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > > > Para: [EMAIL PROTECTED] > > > Asunto: HEX > > > > > > > > > Does anyone have a way/tricks in remembering how to do HEX conversions? > > > > Priscilla Oppenheimer > http://www.priscilla.com > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
That Priscilla is a real jewel, eh? I think I'll add this formula to my *must know* list. The one tid-bit I might include, though not reputed to be 'test centric', is to *memorize* (I say this as a member in good standing of the O)ld G)eezer's C)lub) the binary numeric for HEX digits. The 'weight' of the bits logic has helped me out a few times An interesting math trick, 16^4 is ()+1 or ( )+1. Note that 2^16=16^4=1 binary=0x1 hex. They all reach the same number. It took this 52 year-old maybe a week of practice to 'grok this in it's fullness'. Just my way of figgerin' it out. There are others. It is delightful to hear of someone who hasn't fired up the scientific side of that Windows accessory for this kind of math. I've been helpless without that hex/bin calculator for years. The memorization/concept isn't that hard, though, and, really, CCxx's should, as advertised, be able to do this, 'in your head'. Best, G. -Original Message- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] Sent: Friday, March 02, 2001 4:27 PM To: [EMAIL PROTECTED] Subject: RE: HEX I never even knew the Windows Accessories calculator converted to hex! I just do it manually. I have the following numbers and letters pretty much memorized, so that helps. 10 = A 11 = B 12 = C 13 = D 14 = E 15 = F 16^0 = 1 16^1 = 16 16^2 = 256 16^3 = 4096 16^4 = 65536 Figure out where the number they give you falls in the above list, for example, is it between 256 and 4096? Or between 4096 and 65536? Divide by the smaller of the numbers you select. Keep dividing the remainders until you run out of numbers, (or can select the right answer, it is multiple choice after all!) Here's an example: Convert to Hex. Easy! Divide by 4096 = 1, remainder = 1459 Divide 1459 by 256 = 5, remainder = 179 Divide 179 by 16= B, remainder = 3 Divide 3 by 1 = 3 Answer = 15B3 Note: a few things made this example easy. divided by 4096 is obviously 1. 256 x 5 is obviously 1280. 16 x 11 is obviously 176. Often it's much easier than it seems. (Sometimes, it's not and you just do brute force.) Priscilla At 09:26 AM 3/2/01, Dale Frohman wrote: >exactly. I had a friend who told me there was some HEX conversions on the >BCMSN exam which i am scheduled to take in a couple of weeks. > >On Fri, 2 Mar 2001, Barronton, Ken wrote: > > > Because you can't use it during an exam. Real life...OK, exam...NO. > > > > -Original Message- > > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > > Sent: Friday, March 02, 2001 6:27 AM > > To: 'Dale Frohman' > > Cc: [EMAIL PROTECTED] > > Subject: RE: HEX > > > > > > Why don't you use the calculator of windows accesories? > > > > -Mensaje original- > > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > > Dale Frohman > > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > > Para: [EMAIL PROTECTED] > > Asunto: HEX > > > > > > Does anyone have a way/tricks in remembering how to do HEX conversions? Priscilla Oppenheimer http://www.priscilla.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
I never even knew the Windows Accessories calculator converted to hex! I just do it manually. I have the following numbers and letters pretty much memorized, so that helps. 10 = A 11 = B 12 = C 13 = D 14 = E 15 = F 16^0 = 1 16^1 = 16 16^2 = 256 16^3 = 4096 16^4 = 65536 Figure out where the number they give you falls in the above list, for example, is it between 256 and 4096? Or between 4096 and 65536? Divide by the smaller of the numbers you select. Keep dividing the remainders until you run out of numbers, (or can select the right answer, it is multiple choice after all!) Here's an example: Convert to Hex. Easy! Divide by 4096 = 1, remainder = 1459 Divide 1459 by 256 = 5, remainder = 179 Divide 179 by 16= B, remainder = 3 Divide 3 by 1 = 3 Answer = 15B3 Note: a few things made this example easy. divided by 4096 is obviously 1. 256 x 5 is obviously 1280. 16 x 11 is obviously 176. Often it's much easier than it seems. (Sometimes, it's not and you just do brute force.) Priscilla At 09:26 AM 3/2/01, Dale Frohman wrote: >exactly. I had a friend who told me there was some HEX conversions on the >BCMSN exam which i am scheduled to take in a couple of weeks. > >On Fri, 2 Mar 2001, Barronton, Ken wrote: > > > Because you can't use it during an exam. Real life...OK, exam...NO. > > > > -Original Message- > > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > > Sent: Friday, March 02, 2001 6:27 AM > > To: 'Dale Frohman' > > Cc: [EMAIL PROTECTED] > > Subject: RE: HEX > > > > > > Why don't you use the calculator of windows accesories? > > > > -Mensaje original- > > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > > Dale Frohman > > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > > Para: [EMAIL PROTECTED] > > Asunto: HEX > > > > > > Does anyone have a way/tricks in remembering how to do HEX conversions? Priscilla Oppenheimer http://www.priscilla.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
I don't seem to remember any HEX conversions...so if they were present they must have been pretty simple. At 07:26 AM 3/2/01, you wrote: >exactly. I had a friend who told me there was some HEX conversions on the >BCMSN exam which i am scheduled to take in a couple of weeks. > >On Fri, 2 Mar 2001, Barronton, Ken wrote: > > > Because you can't use it during an exam. Real life...OK, exam...NO. > > > > -Original Message- > > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > > Sent: Friday, March 02, 2001 6:27 AM > > To: 'Dale Frohman' > > Cc: [EMAIL PROTECTED] > > Subject: RE: HEX > > > > > > Why don't you use the calculator of windows accesories? > > > > -Mensaje original- > > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > > Dale Frohman > > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > > Para: [EMAIL PROTECTED] > > Asunto: HEX > > > > > > Does anyone have a way/tricks in remembering how to do HEX conversions? > > > > _ > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > _ > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > _ > > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > >_ >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
exactly. I had a friend who told me there was some HEX conversions on the BCMSN exam which i am scheduled to take in a couple of weeks. On Fri, 2 Mar 2001, Barronton, Ken wrote: > Because you can't use it during an exam. Real life...OK, exam...NO. > > -Original Message- > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > Sent: Friday, March 02, 2001 6:27 AM > To: 'Dale Frohman' > Cc: [EMAIL PROTECTED] > Subject: RE: HEX > > > Why don't you use the calculator of windows accesories? > > -Mensaje original- > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > Dale Frohman > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > Para: [EMAIL PROTECTED] > Asunto: HEX > > > Does anyone have a way/tricks in remembering how to do HEX conversions? > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
When I sat for the BCMSN, I spent a few minutes during the background/preparation questions whipping up a quick hex chart for the boundaries - 10, 20, 30, ... D0, E0, F0. I was very proud of myself until the questions that needed hex conversion had a button at the bottom that opened a full hex-to-decimal conversion page! Don't know about the other tests, though. Andrew Cook > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > Barronton, Ken > Sent: Friday, March 02, 2001 7:27 AM > To: 'Nuria Canamares' > Cc: [EMAIL PROTECTED] > Subject: RE: HEX > > > Because you can't use it during an exam. Real life...OK, exam...NO. > > -Original Message- > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > Sent: Friday, March 02, 2001 6:27 AM > To: 'Dale Frohman' > Cc: [EMAIL PROTECTED] > Subject: RE: HEX > > > Why don't you use the calculator of windows accesories? > > -Mensaje original- > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > Dale Frohman > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > Para: [EMAIL PROTECTED] > Asunto: HEX > > > Does anyone have a way/tricks in remembering how to do HEX conversions? > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
Because you can't use it during an exam. Real life...OK, exam...NO. -Original Message- From: Nuria Canamares [mailto:[EMAIL PROTECTED]] Sent: Friday, March 02, 2001 6:27 AM To: 'Dale Frohman' Cc: [EMAIL PROTECTED] Subject: RE: HEX Why don't you use the calculator of windows accesories? -Mensaje original- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de Dale Frohman Enviado el: Jueves 1 de Marzo de 2001 3:24 PM Para: [EMAIL PROTECTED] Asunto: HEX Does anyone have a way/tricks in remembering how to do HEX conversions? _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HEX
Why don't you use the calculator of windows accesories? -Mensaje original- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de Dale Frohman Enviado el: Jueves 1 de Marzo de 2001 3:24 PM Para: [EMAIL PROTECTED] Asunto: HEX Does anyone have a way/tricks in remembering how to do HEX conversions? _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HEX
I usaully break things down to a nibble at a time if I'm doing binary to hex. 4 bits is exactly 1 Hex digit. Then I make a little chart (stick this chart in your wallet if you cant make it as fast as you can write) Bin = Hex=Dec =0=0 0001=1=1 0010=2=2 0011=3=3 0100=4=4 0101=5=5 0110=6=6 0111=7=7 1000=8=8 1001=9=9 1010=A=10 1011=B=11 1100=C=12 1101=D=13 1110=E=14 =F=15 To Go From BIN to HEX or HEX to bin Take any binary number 10101100 break it up into nibbles 1010 1100 Look it up AC Take a Hex number FF Look it up Your done Sometimes I don't do the table I just covert the nibble to decimal then to hex remembering that 10=A 11=B etc >From Hex to Decimal is only a little harder. If I have my table already I conver it back to binary then to decimal. I do this becase I am faster at Binary to decimal that Hex to decimal. If you really want to go from hex to decimal. just remeber that each digit is 16^number digit. I have a hard time doing that it my head. But since most hex is expressed two digits at a time you can take the LSD(least significant digit) and look it up in the table C=12 Then take the MSD(Most Significant Digit) and times it by 16 A=10*16=160 Add the MSD+LSD and there is you answer 160+12=172 When I do Decimal to Hex I convert the decimal to Binary then I do Binary to Hex. I can do Dec to Bin then Bin to Hext a lot faster than Dec to Hex. I know my 2^n table better than my 16^n table. I hope that helped. Craig "Dale Frohman" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Does anyone have a way/tricks in remembering how to do HEX conversions? > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
