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? b. 172.19.243.254 6. As data travels through the OSI model, the _________ layer is responsible for splitting the data into segments. Transport 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? 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. octet 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? 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 192.168.10.0, which of the following subnet masks provides 32 subnets? b. 255.255.255.248 20. For the Class C subnet mask for 192.168.10.0 described in the previous question, how many host addresses are available on each resulting subnet? b. 6 21. For the Class C network address 192.168.220.0, what subnet mask supports up to 16 subnets? c. 255.255.255.240 22. For the Class C subnet mask for 192.168.220.0 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 Internet? 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: 255.255.255.240 First four subnets: 188.8.131.52/28, 184.108.40.206/28, 220.127.116.11/28, 18.104.22.168/28 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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