Re: CCNA Exam - number of subnet question [7:65234]
I think it depends on the question. I've found that most exams will give a little hint, either the answer doesn't support both choices or the question will have some comment of suitability of subnets. if I had to choose though, I'd choose 2^6-2, since it wasn't till 12.0 that the ip-subnet zero was made default and the tests were written prior to that. scott ""Geert Nijs"" wrote in message news:[EMAIL PROTECTED] > Hello, > > When you are asked for the number of subnets in the exam CCNA 640-607: > > ie. 150.10.10.10 255.255.255.252.0 > > -> subnet bits = 6 > > -> supported subnets: 2^6 or 2^6-2 ?? > > In other words: if noting is mentioned in the question, do I have to > count zero-subnet and broadcast subnet as valid ? or invalid ? > when nothing is mentioned. > > > Geert Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65241&t=65234 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Layer 3 Switches Vs Routers [7:65215]
a "layer three switch" is a router, just as a "switch" is really a bridge. a layer 3 switch 'routes' in hardware, while a router routes in software. thats the easiest way to look at them. it has gaps, but once you get the big picture you can then start to talk about the specifics. probably the biggest thing that a layer 3 switch can't do (unless its changed recently) is route anything but IP. while designing the hardware routing circuits for a L3-switch they had to compromise and IP being the most popular won out. thats not to say that one day they won't have made enough chipsets to route every other kind of protocol also. I suppose since we saw the death of bridges due to switches, we'll also see the death of routers to L3-switch. scott ""nanda"" wrote in message news:[EMAIL PROTECTED] > Hi ... > > We have switches that operate at Layer 3..right.. > My Question is when we have Routers that are good enough why do we need > switches at layer3? > Under what circumtances do we use switches instead of routers? > > Hope I made Myself Clear...Thanks in Advance!!! > > Regards... > Nanda Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65242&t=65215 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP packets unroutable???? [7:65250]
I've never seen that before, but I'd hazard to guess there isn't a 138.168.0.0 network in your routing table. post your routing table. scott ""Xy Hien Le"" wrote in message news:[EMAIL PROTECTED] > Hello Everyone, > > I have this router which will give me the debug message everytime I ping a > connected network: > Every interfaces, ATM, FastEthernet, Serial etc are same results. > Seemed like there are no arp cache for the connect interfaces, but I do not > know the solution to solve this problem!!! > > Anyone with the same problem and solutions??? > > Help > > routerC#debug ip packet de > IP packet debugging is on (detailed) > routerC#ping 138.168.108.2 > > Type escape sequence to abort. > Sending 5, 100-byte ICMP Echos to 138.168.108.2, timeout is 2 seconds: > > 00:13:17: IP: s=138.108.168.3 (local), d=138.168.108.2, len 100, unroutable > 00:13:17: ICMP type=8, code=0. > 00:13:19: IP: s=138.108.168.3 (local), d=138.168.108.2, len 100, unroutable > 00:13:19: ICMP type=8, code=0. > 00:13:21: IP: s=138.108.168.3 (local), d=138.168.108.2, len 100, unroutable > 00:13:21: ICMP type=8, code=0. > 00:13:23: IP: s=138.108.168.3 (local), d=138.168.108.2, len 100, unroutable > 00:13:23: ICMP type=8, code=0. > 00:13:25: IP: s=138.108.168.3 (local), d=138.168.108.2, len 100, unroutable > 00:13:25: ICMP type=8, code=0. > Success rate is 0 percent (0/5) > routerC# Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65258&t=65250 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Help with Memory [7:65192]
yes type of memory must be the same. I know the 1600 series uses EDO, but I didn't know the 2500 did also. if its not the same, it won't fit into the memory slot since the 'key' will not be aligned. also the voltage needs to be the same, but I don't think the speed (60ns) needs to be the same. I've alway bought my 2500 memory off of ebay, the 1600's are the only ones I've used generic memory in. scott ""Vic Dmon"" wrote in message news:[EMAIL PROTECTED] > Hello, Could someone please reply back. I am not even sure if people are > seeing this message. I know that this has been discussed before. I am just > trying to get a know how as to what is the correct memory used. Please let > me know if there is something wrong with the question I have asked but > someone please reply. Thanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65257&t=65192 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: What is a distributed/collapsed backbone? [7:65225]
she was too modest to mention it, but you're best bet for a design education is from Priscillas book. its well worth twice the price (twice the discounted bookpool price that is!! ;)). scott ""Marc Thach Xuan Ky"" wrote in message news:[EMAIL PROTECTED] > Hi all, > I thought I'd do 640-025 CID before it disappears, so I started reading > the Ciscopress book, CID exam certification guide. Now in chapter 2, > section "Issues facing campus LAN designers" (I'm using Safari books > online so I don't know the page number) it shows figs 2.4 and 2.5 > distributed and collapsed backbones respectively. The distributed > backbone shows per floor, one router and one switch, the collapsed > backbone shows a single router for the building fanning out to one > switch per floor. Fair enough I guess, but the scenario 1, Q2 in the > same chapter asks what backbone to use in a particular case and then > answers it with "distributed backbone" and a picture fig 2.8 that looks > rather like the collapsed backbone shown earlier. I obviously have to > learn Ciscospeak for the exam so can anybody tell me, which is it? > rgds > Marc Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65254&t=65225 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Off-topic: VPN possible? [7:65239]
yes I due that type of network monthly for small bussinesses. I'll usually put a 506 at the central office and a 501 at the remote sites. there isn't any point of the routers at either end to NAT, let the FWs do the NATing for everything. scott ""Lo Ching"" wrote in message news:[EMAIL PROTECTED] > Hi All, > > I have one remote location that need connecting to HQ. The internet service > provider can provide me a broadband line to access internet but only with 1 > fixed IP. > > My target is provide connectivity between remote site and HQ with security. > > Can I add a FW/VPN box behind the router like the following? > > remote LAN---FW/VPN---Router--Internet--HQ router---FW/VPN box--Server > > My concern is that the remote site router will NAT-enable so the FW/VPN > behind it will have private address as well. I heard that there are some > issue on IPSec VPN behind the NAT-enable router. Is it ture? > > Also, if no FW/VPN box installed in remote-site, any security concern? > > FR or leased line of course is alternative approach but it is expensive and > slower in speed. > > Thanks in advance. > > rgds, > Lo Ching Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65261&t=65239 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Survived CCDP recertification! [7:65115]
order it from www.amazon.com, last I saw it was still in-stock. also look and see how many of the reviews she wrote herself!! ;) scott ""John McCartney"" wrote in message news:[EMAIL PROTECTED] > Congrats Priscilla! BTW I can't seem to find your "Top Down Net Design" book > in any store in TX. Is it still being published? > Thanks. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65262&t=65115 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT - CDP: Is it treated as a 'vulnerability' in your world? [7:65260]
it the boundaries of the network are well managed, I don't see whats the problem with CDP. if they are sniffing the packets, they're already on your physical network and thus will see the ip structure anyway. the really isn't anything else that is useful that I can think of to a hacker. might as well also turn off snmp while you're at it. scott ""chris kane"" wrote in message news:[EMAIL PROTECTED] > It recently came to my attention that my company may plan to disable all CDP > in our network. The current vibe is that they see it as a security risk. My > intent is to research this and provide a paper arguing for the use of CDP. > The purpose for my post is to see if my opinions of the benefits of CDP are > realistic (sanity check) and to see how others view CDP, weighing it's > usefulness vs. any possible risk. > > I have already begun researching any security releases on CCO in regards to > CDP. Initial scan shows a 'vulnerability' notice that Cisco most recently > updated on Feb 12, 2003. This information can be found at this link: > http://www.cisco.com/en/US/partner/tech/tk648/tk362/technologies_tech_note09 > 186a0080093ef0.shtml > > Looking at CDP from a troubleshooting tool perspective, I am all for it. > I've personally been saved unknown hours tracing down a problem because CDP > allowed me to bounce around the network quickly. Our network is not small. > And as most people would agree, documentation is never what we all would > like it to be. Therefore, I find that CDP's ability to display the network > below Layer 3 is appreciated. > > Also from a tool perspective, I know CiscoWorks has tools to offer that > utilize CDP. And I've seen software from other companies that does as well. > Think Layer 2 traceroute capability. > > Looking at CDP from a multi-vendor platform perspective, I realize that it's > often beneficial to turn off CDP on interfaces that connect to non-Cisco > devices. No point in bothering a non-Cisco device with traffic that it can't > process. But note, this is not turning off CDP globally per router/switch, > but rather, disabling on an as-needed basis per interface. > > I'd like to hear other views and I'd appreciate feedback and opinions about > this. > > Thanks, > -chris Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65260&t=65260 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: URGENT 2511 config [7:66836]
depends if its ever worked before? could be a cabling issue if its never worked before. I like to have a loopback cable/adapter to plug into the ports in these cases to see if I get a response from the 2511. if it was working before and now its not, its probably because a previous seesion is still occupying an old connection. you'll have to kill the session from the 2511. scott ""Metla Venu Gopal"" wrote in message news:[EMAIL PROTECTED] > hi all > i have this 2511 and tried to reverse telnet to a 2503. > it opens up te port and remains idle. > > please help > gimme two or three alternatvies in a go to try them out > please > thanx Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66925&t=66836 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
