CCNA  Exam 640-407

Practice Questions
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1. NVRAM holds what ?
	   startup-config
1 Default time for updates for distance-vector routing protocols
	       30 Sec
3. What are the three switching types
	Cut through
	Fragment-Free
	Store and forward
4. HDLC =
	  Hig level Data Link Control.
	  Bit oriented synchronous data link layer protocol developed by ISO.
	  Derived from SDLC.

5. Frame Relay is variation of _____________ ?

ans: HDLC

6. what is the last ISDN Equipment at CPE ?

ans: NT1

7. Metrick limit for OSPF = ?

ans: 65,535

8. True/false: X.25 can be used fro communication b/w 2 DTEs .

ans: TRUE

9. which layer deals converts formats (unix-dos, EBCDIC-ASCII etc.) ?

ans: Presentation

10. Keystrokes for next command ?

ans: Control-N

11. Each AS (autonomous system) is assigned _________ bit address ?

ans: 16 

12. Class E IP address range and its use ?

ans: 240-255 experimental

13. want to assign 2 IPs (virtual network) to an interface w/o using subinterfaces; command ?

ans: ip address abc.def.ghi.jkl mask mno.pqr.stu.vwx  (where  mno.pqr.stu.vwx is secondary)

14. IPX; name the cisco encapsulations for the following FRAME Types :

Ethernet 802.3    ----> novell-ether
Token Ring        ----> token
Ethernet Snap     ----> snap
Token Ring Snap   ----> snap
Ethernet 802.2    ----> sap
Ethernet II       ----> arpa
HDLC              ----> hdlc

15. Command that will let you debug rip ?

ans: debug ip rip

16. Routers segment network into smaller ________ domains ?

ans: broadcast

17. Switches segment network into smaller _________ domains ?

ans: collission

18. You ran "sh int ser0" ; received 
	   serial0 is up  Line protocol is down   -  what does it mean ?

ans: serial line 0 has a connection problem (no keep alives)

19. You see the following subnet addresses ; what is the subnet mask ?

128.252.4.0
128.252.8.0
128.252.12.0
128.252.16.0

ans: 255.255.252.0

20. Maximum hop is EIGRP ?

ans: 224 (this is correct ) (verified from cisco web site)

21. You want to know the status of each interface ? 2 commands you could run ?

ans: sh int  and sh protocol

22. T/F: High end routers actually monitor their environments (temperatures etc.).

ans: True

23. You do "sh runnin-config" and you get

    !
    enable secret 5 $x$gAcVrJaSh6u9&
    enable password 7 873564gstg54g
    line vty 0 4
    password 56HHJK7654BBN

    what does "5" and "7" indicate on "enable" lines

ans: The numeral 7 indicates that the password is encrypted with the two-way algorithm.
     The numeral 5 indicates that the password is encrypted with the one-way, secret algorithm.


24. What special charcters can you use in defining the command prompt ?

     %h  Router's hostname
     %s  The space character.
     %t  The tab character.
     %n  The absolute line number that is being used by the user.
     %p  The prompt character that can be either the greater-than sign
         (>) for user mode or the number sign (#) for privileged mode.

25. You want to wipe away the default prompt for the configuration mode. Which command do you type ?

ans: no service prompt config (global configuration command)