第4章 网络层 专题二：IP寻址、子网划分 习题课.docVIP

第4章 网络层 专题二：IP寻址、子网划分 习题课 一、CCNA学习指南 第3章子网划分、变长子网掩码和TCP/IP排错 复习题P191~196 基本练习题： 1~5根据IP地址及掩码，回答5个问题 7、VLSM 若需要主机位为x，需求数为y，则2x-2=y，即：x=log2(y+2)，x为整数。 11、广播地址 12、子网规划 13、理解什么是相同的网络？ 15、理解第8个子网的IP范围。 17、思科路由器设置0号子网有效。 18、加深理解可用IP范围。并非最后一个字节为0就为网络地址，最后一个字节为255就是广播地址。 19、可用IP范围。 复习题 1. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask? A. 14 B. 15 C. 16 D. 30 E. 31 F. 62 2. You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask? A. 2 B. 3 C. 4 D. 5 E. 6 F. 7 3. What is the subnetwork address for a host with the IP address 200.10.5.68/28? A. 200.10.5.56 B. 200.10.5.32 C. 200.10.5.64 D. 200.10.5.0 4. The network address of 172.16.0.0/19 provides how many subnets and hosts? A. 7 subnets, 30 hosts each B. 7 subnets, 2,046 hosts each C. 7 subnets, 8,190 hosts each D. 8 subnets, 30 hosts each E. 8 subnets, 2,046 hosts each F. 8 subnets, 8,190 hosts each 5. Which two statements describe the IP address 10.16.3.65/23? (Choose two.) A. The subnet address is 10.16.3.0 255.255.254.0. B. The lowest host address in the subnet is 10.16.2.1 255.255.254.0. C. The last valid host address in the subnet is 10.16.2.254 255.255.254.0. D. The broadcast address of the subnet is 10.16.3.255 255.255.254.0. E. The network is not subnetted. 7. On a VLSM network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses? A. /27 B. /28 C. /29 D. /30 E. /31 11. You have an interface on a router with the IP address of 192.168.192.10/29. What is the broadcast address the hosts will use on this LAN? A. 192.168.192.15 B. 192.168.192.31 C. 192.168.192.63 D. 192.168.192.127 E. 192.168.192.255 12. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask wou