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									Guide to Networking Essentials, 5th ed., 14188-37180
Ch. 6                                                                                        Solutions-1

Chapter 6 Solutions
   Review Questions
       1.   The IPX/SPX protocol was primarily used in which operating system?
            b. NetWare
       2.   An IPv6 address is made up of how many bits?
            d. 128
       3.   The subnet mask of an IP address does which of the following?
            c. defines which part of the address specifies the network portion and which part specifies the
            host portion
       4.   A nonroutable protocol does not operate in which layer of the OSI model?
            e. Network
       5.   Which of the following is a private IP address and can’t be routed across the Internet?
       6.   As data travels through the OSI model, the _________ layer is responsible for splitting the
            data into segments.
       7.   Which of the following is a reason to subnet? (Choose all that apply.)
            a. Networks can be divided into logical groups.
            c. Subnetting can decrease the size of broadcast domains.
       8.   NetBEUI is well suited for large enterprise networks because it’s very fast. True or False?
       9.   Which Transport layer protocol reduces overhead?
            a. UDP
       10. Which of the following protocols resolves logical addresses to physical addresses?
            e. ARP
       11. Which of the following protocols provides connectionless service? (Choose all that apply.)
            a. IP
            b. UDP
       12. Which of the following does TCP use to establish a connection?
            c. three-way handshake
       13. A(n) ____________ is a grouping of 8 binary digits expressed as a decimal number.
       14. Which of the following represents a valid IPv6 address?
            b. 2001:345:abcd::230:44 (the :: represents two or more sets of 0s)
       15. When using TCP/IP, computers on the same network segment must have the same
           _______________. (Choose all that apply.)
Guide to Networking Essentials, 5th ed., 14188-37180
Ch. 6                                                                                      Solutions-2
           a. network number
           c. subnet mask
       16. A connection-oriented protocol provides fast but unreliable service. True or False?
       17. Which are enhancements of IPv6 compared to IPv4? (Choose all that apply.)
           a. larger address space
           c. built-in security
       18. Which protocol can configure a computer’s IP address and subnet mask automatically?
           e. DHCP
       19. For the Class C network address, which of the following subnet masks provides
           32 subnets?
       20. For the Class C subnet mask for described in the previous question, how many
           host addresses are available on each resulting subnet?
           b. 6
       21. For the Class C network address, what subnet mask supports up to 16 subnets?
       22. For the Class C subnet mask for described in the previous question, how many
           hosts are available per subnet?
           c. 14
       23. If you create a supernetted subnet mask for seven contiguous Class C IP addresses, how many
           bits worth of additional address space for host addresses do you create?
           b. 3
       24. Which IP addressing scheme permits workstations to use private IP addresses to access the
           b. NAT
       25. When a Windows 98 or later computer is configured to use DHCP but no DHCP server is
           available, what type of address is configured automatically for that computer?
           b. APIPA

   Hands-on Projects
       No answers necessary

   Case Projects

       Case Project 6-1

       Subnet mask:
       First four subnets:,,,
       Case Project 6-2
Guide to Networking Essentials, 5th ed., 14188-37180
Ch. 6                                                                                       Solutions-3
       You should ask the employee to open a command prompt window and type the command ipconfig
       /all. This employee is receiving an APIPA address, which means her computer was unable to
       contact a DHCP server. The DHCP server should be checked for functionality, and if it’s okay, the
       employee’s network connection should be checked.
       Case Project 6-3

       To make two broadcast domains, a router must be installed. Furthermore, NetBEUI is not routable
       and must be replaced by a routable protocol, with TCP/IP being the best choice. In addition,
       Windows XP no longer supports NetBEUI, so even if you decide against the two broadcast
       domains, a different protocol must be used so that the Windows XP and Windows 98 computers
       can communicate. An additional consideration is to install a DHCP server. With 200 computers
       running TCP/IP, static assignment of addresses is unwieldy.
       Case Project 6-4

       You must set up a Network Address Translation (NAT) device (usually the router that connects
       you to the Internet) and use PAT. You can use all four public addresses for PAT, or you can use
       just one or two of the public addresses for PAT and use the remaining public addresses to set up a
       publicly accessible Web server or other service you want to be available through the Internet.

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