CCNA(思科网络安装支持与认证助理)考核试题库:3

22: which of the following protocols maps ip addresses to mac addresses for connectivity to occur between two hosts?
a. arp
b. rarp
c. slarp
d. dhcp
　　23: your junior network administrator cannot seem to ping a host in another network and asks you why it isn't working. which of the following is not an answer that you would give him?
a. the host's default gateway is down.
b. the destination host is not powered on.
c. the ip address of the router inte***ce is incorrect.
d. the ip address of the switch to which the destination host connects is incorrect.
e. the host is in a different subnet.
　　24: which of the following classes of ip addresses is utilized for multicasting?
a. class a
b. class b
c. class c
d. class d
　　25: you give your it department a spreadsheet of ip addresses and their subnets. you receive a call from one of the junior techs asking what the /26 means next to the ip addresses. you tell her:
a. it represents the number of hosts possible on that subnetwork.
b. it represents the number of subnetworks that are being used.
c. it represents the class of ip address being used.
d. it represents the number of bits in the subnet mask that are 1.  
　　26: you are given an ip network of 192.168.5.0 and told that you need to separate this network into subnetworks that can support a maximum of 16 hosts per subnet. this will help alleviate congestion on the network. what subnet mask can you use to create the subnets necessary to meet the given criteria?
a. 255.0.0.0
b. 255.255.0.0
c. 255.255.255.0
d. 255.255.255.224
e. 255.255.255.240
　　27: which of the following would a class a network be assigned to?
a. government agency
b. small-to-medium sized corporation
c. soho
d. an individual
    28: a client has the ip address 192.168.5.98/27. which of the following addresses are on the same subnet as this host? (choose two.)
a. 192.168.5.95
b. 192.168.5.100
c. 192.168.5.128
d. 192.168.5.110
　　29: which of the following ip addresses is not a public ip address that can be routed over the internet?
a. 2.3.4.5
b. 11.12.13.14
c. 165.23.224.2
d. 172.31.45.34
e. 203.33.45.22
　　30: you are given a class b network. what is the default subnet mask assigned to the class b network?
a. 255.255.255.255
b. 255.255.0.0
c. 255.224.0.0
d. 0.0.0.0  
　　31: you are troubleshooting your router's inte***ces. for some reason, the ethernet inte***ce will not accept the ip address of 192.168.5.95/27 that you've assigned. which of the following explains the router's refusal to take the ip address?
a. class c addresses cannot be assigned to ethernet inte***ces.
b. the /27 is an invalid mask.
c. it is a broadcast address.
d. it is a public ip address.
e. it is a private ip address.