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CCNABRAINDUMP2(1) |
| 来源:www.stu88.com 时间:2006-04-01 |
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CCNA exam test# 640-407
I just finished the exam and passed. 78 questions long, no fill in the blank, most of the questions dealt with the OSI model and data encapsulation.
KNOW THESE HARD- I would say memorize everything about them so that you can write them in your sleep.
For instance, it would give you the steps of data encapsulation broken down into boxes, and then ask you to place them in order.
Also would gives examples from different layers, and ask you to match function to layer name.
There were also at least 5-10 questions on ISDN and ppp... Things like, a bri gives you x number of b channels plus X number of D.
how do you configure a bri interface.
The subnet masking questions seemed easy. Just know masking and you'll be fine. I think one question asked me what the class, network number, and broadcast address was on say an address of 196.34.5.34, netmask 255.255.255.128.
Dont' even look at appletalk, I saw nothing about it.
Know your switching, cut-through vs store & forward, and what each does
Also know your hardware, for instance, what layer does a bridge work at, a repeater?
In general, most questions I could answer by process of elimination.
For insatnce if its asking you about what UPPER-layer of the osi modle handles something, and transport is an option... enough said.
What else...
The following commands were asked about:
clock rate
hostname
banner motd
?
which key to repeat last command
access list syntax for standard ip
how to enable igrp routing
Also maybe 10 or so questions on copying to-from tftp servers
Just a note for everyone. This test is not easy, but its not hard either. To me it was more of a "networking 101," than a " Cisco " exam. Just know the OSI layer, encapsulation, WAN protocols, subnet-masking, and simple commands, and you'll pass! I studied Lammle's study guide book for a week. Memorized the exam questions in the book, which did help for things like what encapsulation type goes with Ethernet_II in IPX->(I had no experience with IPX!) My experience with Cisco did help, but for the most part if you understand the material in Lammle's book, and do the labs in the book you WILL pass! Good Luck!
I managed to pass my CCNA exam. There were a few repeat questions on my exam. The primary source for studying was the CCNA study guide by Lammel from Sybex. I also used ICRC by Laurel as a backup.
The following are some of the questions I got from the exam.
1) There was a question on half-duplex. I answered like a “one-way narrow bridge”.
2) On the ipx ethernet question, I answered, ipx int e 0, ipx int e0, and ipx int.
3) There were a lot of subnet calculations on my exam. Be sure that you know how to find the class, max number of hosts and subnets given the ip and subnet.
4) I got the question on setting the rate on an interface to 56k. I answered: clock rate 56000.
5) Be careful of commands being executed in the wrong mode. Ea: access-list command can only be executed in the global config mode not the interface mode.
6) The was a question on filtering out telnet using access-list 1. I forgot the options but basically you need to remember that access-list 1-99 are standard IP access-lists. Standard IP access-lists CANNOT filter out ports like telnet (port 23). So you must actually filter out the whole interface in the question. Very tricky!!!
7) There was question on techniques that will prevent routing loops. I answered hold downs, triggered updates, poison reverse, and split-horiizon.
8) Know the OSI layers well. A lot of questions (7 or more) were based on knowing the definitions of each layer. 共6页: 1 [2] [3] [4] [5] [6] 
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