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Communications and Networking – Practice Quiz –  Unit 6

Communications and Networking – Practice Quiz – Unit 6

  1. What is the primary reason for the development of IPv6?
    Select one:
    a. security
    b. header format specification
    c. expanded addressing capabilities Correct
    d. addressing simplificationsWhich statement describes the purpose of a default route?
  2. Select one:
    a. to identify the Layer 2 address of an end device on the local network.
    b. to forward data to the local switch as the next hop to all destinations.
    c. to transfer data to another host on the same network segment.
    d. to transfer data to a host outside the local network when no other route to the destination exists. Correct
    e. to send packets whose destination address is unknown
  3. In Stop-and-Wait, deadlock can be avoided by the sender side doing retransmit-on-timeout while the receiver does not do retransmissions.
    Select one:
    False Correct 
  4. The terms autonomous system (AS) and routing domain are used to refer to a set of routers under common administration, using a common link-cost assignment.
    Select one:
    True Correct


  5. If the IPv4 “Don’t Fragment” (DF header flag) is set to 1 by the sender, then a router must not fragment the packet and must _____ instead.
    Select one:
    a. forward it unchanged
    b. return it to sender
    c. truncate it
    d. drop it Correct


  6. What is the size of IPv6 addresses?
    Select one:
    a. 256 bits
    b. 96 bits
    c. 32 bits
    d. 128 bits Correct
    e. 64 bits


  7. What OSI layer identifies the communicating applications?
    Select one:
    a. Layer 1
    b. Layer 2
    c. Layer 3
    d. Layer 4 Correct
    e. Layer 5


  8. The Split Horizon fix to the slow-convergence problem prevents all linear routing loops.
    Select one:
    True Correct


  9. If an IPv4 address has all 1-bits for the host bits, it is of type:
    Select one:
    a. broadcast Correct
    b. invalid
    c. unallocated
    d. multicast


  10. What version of IP is the most common in the world?
    Select one:
    a. IPv3
    b. IPng
    c. IPv5
    d. IPv6
    e. IPv4 Correct


  11. The Routing Information Protocol (RIP) is an intra-domain routing protocol based on _________ routing
    Select one:
    a. distance vector Correct
    b. link state
    c. path vector
    d. OSPF
    e. path state


  12. Which information is found in the UDP header?
    Select one:
    a. Sequencing
    b. Flow Control
    c. Acknowledgement
    d. Urgent data flag
    e. Source and Destination Port Correct


  13. BGP implements policy through filtering rules which allow rejection of certain routes at three different stages. Which of the following is NOT one of those stages?
    Select one:
    a. Import filtering
    b. Route path optimization Correct
    c. Export filtering
    d. Best path selection


  14. Which application made the greatest use of early Remote Procedure Call?
    Select one:
    a. Network File System Correct
    b. Windows Internet Explorer
    c. File Transfer Protocol
    d. Email


  15. UDP (like TCP) avoids IP fragmentation by relying on the Path MTU Discovery mechanism.
    Select one:
    False Correct


  16. Which is an important characteristic of UDP?
    Select one:
    a. acknowledgement of data delivery
    b. minimal delays in data delivery Correct
    c. high reliability of data delivery
    d. same order data delivery
    e. flow control


  17. The size of the UDP port field is:
    Select one:
    a. 8 bits
    b. 16 bits Correct
    c. 32 bits
    d. 48 bits
    e. 64 bits


  18. A possible Internet compatibility issue is that a packet is too large for a given network. IPv4 handles this by supporting:
    Select one:
    a. large packets
    b. TTL (Time-to-Live) header field
    c. fragmentation Correct
    d. segmentation


  19. IPv4 class D addresses are used for:
    Select one:
    a. broadcast traffic
    b. multicast traffic Correct
    c. unicast traffic
    d. anycast traffic


  20. What is the primary reason for the eventual retirement of IPv4?
    Select one:
    a. security
    b. header format specification
    c. limited addressing capabilities Correct
    d. addressing simplifications
    e. performance issues


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