CCNA Sample Questions

640-801

29. The exhibit displays the partial contents of an encapsulation header. Which of the following are true of the network traffic represented in this diagram? (Select three)
    
    1. This is traffic from an FTP server.
    2. This is a UDP header.
    3. The last PDU received in this session had a sequence number of 292735.
    4. This is an OSI layer 4 header.
    5. This is traffic from a Telnet client.

    Answer :D, A &C

30. What does the concept route aggregation mean when one talks about using variable subnet masking?
    1. Reclaiming unused space by means of changing the subnet size.
    2. Combining routes to multiple networks into one supernet.
    3. Calculating the available host addresses in the AS.
    4. Deleting unusable addresses through the creation of many subnets.

    Answer :B

31. What OSI layer is FRAME-RELAY mapped to?
    1. Network
    2. Transport
    3. Data Link
    4. Physical

    Answer :C

32. Please drag the appropriate options to the correct targets. After completing the question press the push button below the question to save your response.

    Answer: 1:E,2:A,3:F

    Explanation:
    LAPD - provides the data link protocol that allows delivery of messages across that D-channel to the local switch.
    LAPB - Protocol and is designed primarily to satisfy the signaling requirements of ISDN basic access. It is defined by ITU-T Recommendations Q.920 and Q.921.
    TE1 - ISDN -capable four-wire cable. Understands signaling and 2B=D. Uses an S reference point.
    ITU.T.430 - Defines connectors, encoding, framing, and reference points.
    TE2 - Equipment that does not understand ISDN protocols and specifications (no ISDN awareness).
    Uses an R reference point, typically an RS-232 or V.35 cable, to connect to a TA.
    NT1 - CPE equipment in North America. Connects with a U reference point (two-wire) to the telco.

33. Which routing protocol would allow a network administrator scalability, VLSM support and minimize overhead if the network administrator wants to merge different networks all using routers from multiple vendors?
    1. OSPF
    2. VTP
    3. EIGRP
    4. RIP
    5. IGRP

    Answer :A

34. What Channel is provided by ISDN BRI?
    1. 2B+1D
    2. 30B+1D
    3. 23B+1D
    4. 2D+1B

    Answer :A

35. Which of the following describe the process identifier that is used to run OSPF on a router? (Choose two)
    1. It is globally significant.
    2. It is an optional parameter required only if multiple OSPF processes are running on the router.
    3. All routers in the same OSPF area must have the same process ID if they are to exchange routing information.
    4. It is needed to identify a unique instance of an OSPF database.
    5. It is locally significant.

    Answer :D & E