                 CCNA  Exam 640-407

    Practice Questions
    ________________________________________________________________________________________________

    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)