3 4

Chapter Review

  1. Match the protocols in the left column with the appropriate descriptions in the right column.

    a.  DHCP

    1.  Transmits e-mail messages between servers

    b.  ARP

    2.  Routes datagrams to their final destination

    c.  IP

    3.  Provides connection-oriented service at the transport layer

    d.  POP3

    4.  Resolves host names into IP addresses

    e.  SNMP

    5.  Connects two systems at the link layer

    f.  ICMP

    6.  Converts IP addresses into hardware addresses

    g.  TCP

    7.  Automatically configures TCP/IP clients

    h.  DNS

    8.  Provides communications between e-mail clients and servers

    i.  PPP

    9.  Carries network management data to a central console

    j.  SMTP

    10.  Carries error messages from routers to end systems

  2. Which of the following fields is blank in an ARP Request message?
    1. Sender Hardware Address
    2. Sender Protocol Address
    3. Target Hardware Address
    4. Target Protocol Address
  3. Which ICMP message type is the basis for the Traceroute utility?
    1. Echo Request
    2. Time To Live Exceeded In Transit
    3. Host Unreachable
    4. Fragment Reassembly Time Exceeded
  4. Why are ARP Request messages transmitted as broadcasts?
  5. Which ICMP message type performs a rudimentary form of flow control?
    1. Source Quench
    2. Router Solicitation
    3. Redirect
    4. Echo Request
  6. Which of the following fields in an ARP Reply message contains a value supplied by the system transmitting the message?
    1. Sender Hardware Address
    2. Sender Protocol Address
    3. Target Hardware Address
    4. Target Protocol Address
  7. How does ARP minimize the number of broadcasts it generates?
  8. Which application layer protocol uses two port numbers at the server?
    1. SMTP
    2. HTTP
    3. DHCP
    4. FTP
  9. Which IP address class provides for the largest number of hosts?
    1. Class A
    2. Class B
    3. Class C
    4. All three classes provide the same number of hosts.
  10. What kind of IP address must a system have to be visible from the Internet?
    1. Subnetted
    2. Registered
    3. Class A
    4. Binary