CCNABRAINDUMP2(1)
添加时间: 2007-9-6 1:35:14 作者: Cisco考试认证 阅读次数:24 来源: http://www.d9soft.com
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.
9) 2 questions on ISDN definitions (CPE, demarc, DCE, DTE etc..)
Study the questions from the Sybex book. A lot of them were very close to the exam questions. A lot of the questions had 11 answers listed so guessing will be tough. Be sure to know the material well before taking the exam.
Good Luck!!!
Sky Hawk
Passed CCNA exam with 870 out of 1000 , passing score : 775.
78 Questions in 90 mins.
Used Sybex: Todd Lammle Study Guide and Study Exam notes Books., www.cisco.com
1. concentrate on 7 layers of OSI - about 10 qns on these.
- remember
- Session Layer :- dialog control start ,control , End Conversation with Applications.
- Transport LAyer :- Flow control end -to end control . Establish and Drop reliable connex and uses Virtual Circuits (PVC)s and reassembe Segments back in order.
- Network LAyer :- Logical addressing (IP/IPX) of packets and Network Routing .
- Data Link Layer : - Hardware MAC address of NIC Cards .MAC = 32 bytes Network Adrs, 48 byte of Node address .
- Remember the 5 steps of how information is converted into Data,segments, packets, Frames,Bits and clocking sysncronizarion for moving data across.
2, Read on WAN protocols FR, ISDN (2 B chanls each 64kbps + 1D chl of 16Kbps totl of 144k)
ISDN uses Outband signaling. TE1,Te2, what are SPIDS used for ?
3. Know yr IP addressing and Subnetting real well e.g for class C networks :
192 = 11000000 - 2 bits for subnetting , 6 bits for hosts = 2power of 6 =64-2 = 62 hosts
224 = 11100000
240 = 11110000 means 16 subnets and 16 hosts
248 = 11111000
252 = 11111100
254 = 11111110
3. Network Security with Access-lists - understand IP/IPX std and Extended access-lists
e.g to stop IPX SAPs ,but permit anyting else : access-list 1000 deny 2e.1234.4567.1212 4
access-list 1000 permit -1
the 4 at the end of line = type of svc = advertize FileServices. 7 = print svcs,
Also know how this cmd to act upon the interface s0, IPX access-group 1000 in/out
4. remember how to enable IPX routing : conf t, ipx routing ( in global config)
5. Which IOS cmd would you use to find out what IPX routes your router knows??
show ipx route ( try it on the router)
6. Connection oriented protocols =TCP, Connexionless UDP
7. which of the following protocols emply the HELLO protocol ?
EIGRP, IS-IS, OSPF yes, not RIP not IGRP
8. RIP, IGRP are distance Vector routing protocols,
9. remember what is DTE device : Router, 3270 Controller
what is DCE device : DSU/CSU , Modem, FR access switches at Telco Cloud.
10. study How to Enable IGRP : conf t, router IGRP 100 (100=AS #)
then enter Netrwork nbrs e.g 172.16.0.0
11. Switches : use store and Forward by default unless u change it to cut-thru mode
Store and Forward : has highest latency due to reading all frame and checking for CRC ( Frame Error ) before sending it out to Destn. MAC.
12. Remember Source IP, Dest IP do not change on the way to a destination router from router to router.only MAC addresses change on the way to Destn.
Memorize the Frame types for IPX.
Good Luck , it not that hard if u uderstand routing and OSI layers.WAN Protocols, Network security, I will add more when I remember some More later.
test name: CCNA ( Cisco Certified Network Associate)
test #: 640-407
From: Scampy, Dublin.
____________________________________________________________________
Hello People!
I have just sat the CCNA exam. To be honest, it was slightly easier than I thought. It is different from the MCSE exams in that you can't review your questions at the end of the exam and the questions are far less verbose. The passmark is 755 and you have to do 78 questions in 90 minutes. Below I have included any questions that were in any way confusing.
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