CCNA Sample Questions

640-801

8. Which PPP authentication methods will you use when configuring PPP on an interface of a Cisco router? (Select two options.)
   1. SSL
   2. SLIP
   3. PAP
   4. LAPB
   5. CHAP
   6. VNP

   Answer :C, E

   Explanation :Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) authenticate the endpoints on either end of a point-to-point serial link. Chap is the preferred method today because the identifying codes flowing over the link are created using a MD5 one-way hash, which is more secure that the clear-text passwords sent by PAP.

9. If NVRAM lacks boot system commands, where does the router look for the Cisco IOS by default?
   1. ROM
   2. RAM
   3. Flash
   4. Bootstrap
   5. Startup-.config

   Answer :C

   Explanation :Flash memory - Either an EEPROM or a PCMCIA card, Flash memory stores fully functional IOS images and is the default location where the router gets its IOS at boot time. Flash memory also can be used to store any other files, including configuration files.

10. You need to troubleshoot a Cisco router at the Toronto office of How2Pass Inc. The router loses its configuration each time it is rebooted. You study the output displayed in the exhibit. What is the cause of the problem?

    Exhibit:

    ----- output omitted ---- Cisco 2620 (MPC860) processor (revision 0x200) with 16384/2048K bytes of memory. Processor board ID JAD05076EF6 (3878188963) M860 processor: part number 0, mask 49 Bridging software. X.25 software, Version 3.0.0. 2 Ethernet/IEEE 802.3 interface(s) 2 Serial(sync/async) network interface(s) 2 Low speed serial(sync/async) network interface(s)

    32K bytes of non-volatile configuration memory. 16384K bytes of processor board System flash (Read/Write) Configuration register is 0x2142

    1. There is insufficient RAM for the IOS image
    2. The configuration register is misconfigured
    3. There is insufficient flash memory
    4. NVRAM failed POST
    5. There is insufficient NVRAM
    B
11. If an Ethernet port on router was assigned an IP address of 172.16.112.1/20, what is the maximum number of hosts allowed on this subnet?
    1. 2046
    2. 8190
    3. 4094
    4. 4096
    5. 1024

    Answer :C

12. The Frame Relay circuit between router A and router B is experiencing congestion. Which type of notification are used to alleviate the congestion? (Choose three)
    1. DE
    2. BECN
    3. DLCI 100 is Down
    4. CIR
    5. FECN

    Answer :D, B & A

13. At which OSI layer does data translation and code formatting occur?
    1. Network
    2. Physical
    3. Data link
    4. Transport
    5. Session
    6. Presentation

    Answer :F

14. Which one of the following is a reason to use a hardware address?
    1. To transmit a packet from one local device to another local device.
    2. To transmit a frame from one interface to another interface.
    3. To obtain a vendor code/serial number from the user.
    4. To transmit data from one local device to remote device across Internet.
    5. To contain logical information about a device to use an end-to-end transmission.

    Answer :B