FYI for who ever wants to know....A great website for learning subnetting ( actually learning the binary whys and hows instead of shortcuts ) is www.learntosubnet.com
There are some great free resources...and very good explanations for those who are just starting to learn it. Dain ""Michael L. Williams"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Wow..... According to my binary math, 4 bits = 16 combinations. > > 1 bit = 2 combinations (2^1 = 2) > 2 bits = 4 combinations (2^2 = 4) > 3 bits = 8 combinations (2^3 = 8) > 4 bits = 16 combinations (2^4 = 16) > > Now..... when converting from binary to decimal, the 4th bit (from the > right) has a (decimal) value of 8 (2^[4-1]), but of course when you add the > values of the bits from 4 down, you get 8+4+2+1 = 15 (thus giving 16 > combinations, 0 through 15) > > (Too all that have read my posts in the past, now you know why I bitch up a > storm when I hear someone encourage someone else to memorize subnetting > charts and bitswapping charts instead of taking an hour and learning how > binary actually works... geez) > > Mike W. > > ----- Original Message ----- > From: Andy Hoang > To: Michael L. Williams ; > Sent: Monday, July 08, 2002 10:51 PM > Subject: RE: Class C summarization question [7:48367] > > > > I would say 8 is correct. 4 bits make 8 combinations. > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > > Michael L. Williams > > Sent: Monday, July 08, 2002 8:15 PM > > To: [EMAIL PROTECTED] > > Subject: Re: Class C summarization question [7:48367] > > > > > > I would say 16 as well..... > > > > Mike W. > > > > > > "Dain Deutschman" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > I'm confused about a practice question for BSCN that I came across: > > > > > > Your routing tables are getting very large and you need to configure > route > > > summarization. How many class C internet addresses can you summarize > with > > a > > > /20 CIDR block? > > > > > > Answer: 8 > > > > > > Would it not be 16? Where am I going wrong? > > > > > > -- > > > Dain Deutschman > > > CNA, MCP, CCNA > > > Data Communications Manager > > > New Star Sales and Service, Inc. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48376&t=48367 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
