單項選擇題Three access ports have been installed and configured to a small office.What term defines the wireless topology?（）

A. IBSS
B. BSS
C. ESS
D. SSID


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1.單項選擇題

The network administrator cannot to switch 1 over a telnet session,although the hosts attached to switch 1 can ping the interface Fa0/0 of the router.Given the information in the graphic and assuming that the router and switch2 are configured properly,which of the following commands should be issued on switch 1 to correct this problem?（）

A. Switch1(config)# i nterface fa0 /1 Switch1(config-if)# ip address 192.168.24.3.255.255.255.0
B. Switch1 (config)#interface fa0/1 Switch1 (config-if)# switchport mode trunk
C. Switch 1 (config)# i nterface fa0 /1 Switch1 (config-if)# duplex full Switch1 (config-if)# speed 100
D. Switch1 (config-if)# default-gateway 192.168.24.1
E. Switch1 (config)# line con 0 Switch1(config-line)# password cisco Switch1 (config-line)#login

2.單項選擇題You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?（）

A. 192.168.252.8 255.255.255.248
B. 192.168.252.8 255.255.255.252
C. 192.168.252.16 255.255.255.240
D. 192.168.252.0 255.255.255.252
E. 192.168.252.16 255.255.255.252

3.單項選擇題Which command displays the CHAP authentication process as it occurs between two routers?（）

A. debug authentication
B. debug chap ppp
C. debug chap authentication
D. debug ppp authentication

4.單項選擇題At which layer of the OSI model dose PPP perform?（）

A. Layer 3
B. Layer 4
C. Layer 2
D. Layer 5

5.單項選擇題Which command is used to display the collection of OSPF link states?（）

A. show ip ospf lsa database
B. show ip ospf link-state
C. show ip ospf neighbors
D. show ip ospf database