多項選擇題A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem (Choose three.)()。

A.mismatched TKIP encryption
B.null SSID
C.cordless phones
D.mismatched SSID
E.metal file cabinets
F.antenna type or direction


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1.單項選擇題Which command is used to see the path taken by packets across an IP network?()

A.show ip route
B.show route
C.traceroute
D.trace ip route

3.單項選擇題Which component of VPN technology ensures that data can be read only by its intended recipient?()

A.data integrity
B.encryption
C.key exchange
D.authentication

4.多項選擇題If IP routing is enabled, which two commands set the gateway of last resort to the default gateway?()

A.ip default-gateway 0.0.0.0
B.ip route 172.16.2.1 0.0.0.0 0.0.0.0
C.ip default-network 0.0.0.0
D.ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E.ip route 0.0.0.0 0.0.0.0 172.16.2.1

5.單項選擇題A default Frame Relay WAN is classified as what type of physical network()。

A.point-to-point
B.broadcast multi-access
C.nonbroadcast multi-access
D.nonbroadcast multipoint
E.broadcast point-to-multipoint

7.單項選擇題Which command is used to load a configuration from a TFTP server and merge the configuration into RAM?()

A.copy running-config: TFTP
B.copy TFTP: running-config
C.copy TFTP: startup-config
D.copy startup-config: TFTP

8.多項選擇題Which two commands correctly verify whether port security has been configured on port FastEthernet0/12 on a switch?()

A.SW1#shows withport port-security interface FastEthernet0/12
B.SW1#shows withport port-secure interface FastEthernet0/12
C.SW1#show port-secure interface FastEthernet0/12
D.SW1#show running-config

9.多項選擇題下面哪些是ACL可以做到的?()

A.允許125.36.0.0/16網(wǎng)段的主機使用FTP協(xié)議訪問主機129.1.1.1;
B.不讓任何主機使用Telnet登錄;
C.拒絕一切數(shù)據(jù)包通過;
D.僅允許某個用戶從外部登錄,其他用戶不能這樣做。

10.多項選擇題What are two reasons that a network administrator would use access lists (Choose two.)()。

A.to control vty access into a router
B.to control broadcast traffic through a router
C.to filter traffic as it passes through a router
D.to filter traffic that originates from the router
E.to replace passwords as a line of defense against security incursions

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