failed ccna with 750, book + testking + actual routers 1

[dmb2002man]

what should i do now. I have setup 2500-2503-1900-2924 equipment at my house running eigrp and can ping all devices and everything. On my exam there were alot of nat and ip access list and i need to get alot more in depth with them. I do have the latest testking but im not sure how much that helped me or not. I did find a few similiar questions on the exam. Basically i found out there wasnt one easy question on the exam i took. I thought for sure some of these questions would be on it.

DOD-Application, host-to-host, Internet, Network Access and how it compares to layers of the IOS.

Bits, frames, packets, segments, datagram, datagram, datagram

I know exactly how to commute the ip address with hosting and network bits. Like for example 192.168.0.12/26, how many usable host will this address adddress. 2^6-2=62

Im having trouble like if there is a network with routers/switches, pcs, and most of the stuff has ip address and it says what will be ip address of this router?

I know that rip, igrp are distance vector and dont support VLSM

I know that OSPF, EIGRP and RipV2 are link state and do support VLSM

Eigrp is a cisco proprietory. CDP is cisco proprietary.

Rip is 120, osp 110, igrp 100, eigrp 90.

Rip and igrp are calculated on hops and rip is maxed on 15 hops and igrp is 255.

Rip sends out broadcast every 30 seconds while igrp is 90 seconds.

Ospf and Eigrp dont broadcast.

Eigrp is the best routing protocol but its cisco proprietary so the next is ospf if your not running all cisco equipment.

I had a lot of questions where it would show a question or problem and you would have to pick 2 or 3 layers for the problem and i wasnt sure on a few of those.

I had one simulation where alls i had to do was no shutdown serial port 1 to bring it up since when i do show running-config it said it was administravely down and wasnt receiving any updates and that had to be the problem to solve that one. I did show ip interfaces on the serial port one to show it was down. First i had to log into the router, show cdp neighbors detail so i can get the ip address to router adjacent to it, then telent into that router, do a show cdp neighbors detail on that to get the router that was on the farthest right. So i got the ip address of that and telnet into it and do a show ip interface and it shows serial 1 administ down, so i bring it back up and save the running-config and move on to next questions.

I had a question about password recovery and it was at the command prompt and it wanted to know what you type in and i put 0x2142 and after that you change it back to 0x2102.

Had alot of nat questions that i wasnt 100% on because i didnt think there would be 10-15 questions on just that alone.

Alot of questions on access lists too which i wasnt 100% sure on.

I had a few questions on vlans, that one showed a vlan in client mode and asked what would he doing. Well being in client you know he wouldnt beable to change anything he would just sent out updates.

Alot more questions on ospf than i thought and only a few on rip.

Im still kind of confused on nat and how you take a private address and convert it to the web. So i really need to study alot more on that subject too.

Im just too the point now that i need something that is going to be pretty clear of why the answers are that. I know testking gives the answers but on alot you dont even know why on the subnetting parts and stuff which is basically the whole ccna exam and im sure some answers are wrong too.

Has anyone tried

http://www.thebryantadvantage.com/

package deal.

I just need some examples that i could translate to my real exams and practice more on the code and commands. He states that he will give you complete examples and everything.

thanks

Josh

 

[dmb2002man]

hey guys came up with another question. Only about 80 pages to go now to finish the book. I came up with another access-list 10 problem. I scanned in the image from the page so you can help me out with.

Upon the links in the picture, i have no way to understand how the came up with the address in the access-list 1 deny command. I know that access list which use the block sizes 0 8 16 32 64 128.

So a 172.16.144.17/19 would have a 255.255.224.0 so a block size of 32, so 0 32 64 92 and the 17 would fall between 0 and 32. But how did they come up with access-list 1 deny 172.16.48.0 0.0.15.255, well i understand the 0.0.15.255. That just means it would block 172.16.48.0 - 172.16.63.0. I know that 0 is a direct match of number and 255 is any number.

Another example, it gave 172.16.50.173/20 well it would be 255.255.240.0 which is a block size of 16, meaning 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240, so the 173 would fall between 160 and 176. So it came up with access-list 1 deny 172.16.48.0 0.0.15.255.

Im just wondering how they came up with the access-list numbers. Heres a picture of the link which i scanned in from the book.

http://ironhorsesafety.com/gallery/albums/album20/IMAGE0008.jpg

Please help me clear this up and thanks for everyone always helping me out.

Josh

 

[Jsteve]

Looks like your mixing up your octets where the subnetting is happening.

for example /19 is in blocks of 32 , but in the third octet (.144 and not the .17)

1. 128 - 160 (blocks of 32 in the 3rd octet)
2. 48 - 64 (blocks of 16 in the 3rd octet)
3. 192 - 255 (blocks of 64 in the 3rd octet)
4. 88 - 96 (blocks of 8 in the 3rd octet)

 

[dmb2002man]

so am i doing something wrong or is the book wrong.

 

[dmb2002man]

ok i see what your saying now. Im going to look it over more now.

 

[dmb2002man]

So in 172.16.144.17/19. In the 3rd octet which is 144, that is a block size of 32 which falls between 128 and 160. So the access-list would be 172.16.128.0 0.0.31.255 correct.

so 172.16.92.10/21. 21=255.255.248.0 which is a block size of 8. So it would be 0 8 16 24 32 40 48 56 64 72 80 88 96 104...
so 92 would fall between 88 and 96. So the access-list 1 deny would be 172.16.88.0 0.0.7.255 correct.

Im pretty sure i got it down now since im using the 3rd octet.

Someone let me know if these are correct and thanks for helping me out clear this problem up. God i love this forum for help.

 

[Jsteve]

You've got it

 

[dmb2002man]

I am now ccna certified. I passed it about 3 weeks ago with a 961/1000. I got a 100% on every part except the troubleshooting.

Now im working on a project at my new network administrator job and i have a 2620 router. Well i just upgraded the flash, boot rom to 32, and 64 megs of ram but i am getting a error saying saying no flash found after upgrade. Its there but im just wondering what else i need to do. It boots up to a rommon> prompt. I try and write a file to it but it wont take anything.

Can someone please help me out.

 

[darkhut]

I can tell you how i managed to upgrade the flash in my 2500. You need to boot into RXboot, and from there, you could simply do a copy tftp flash So..in order to get to Rxboot, maybe.try and change the registry?

fresh CCNA

 

[qz01gs]

CCNA isn't easy compared to others certs like microsoft and avaya. But from my experience when I failed first time, I just really needed to brush up on switching and subnetting. 2nd time around I cleared the exam quite easily. Good luck for the next re-take.

 

[burtsbees]

Did you ever get the 2620 going?

Burt