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Cisco CCNA 640-802试题(71-75)

2007-12-24 11:17 佚名 51CTO.com 字号:T | T
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本文内容为Cisco CCNA认证考试640-802(71-75)试题及答案。

AD:

71. Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three.)

A. HDLC
B. Ethernet
C. Token Ring
D. PPP
E. FDDI
F. Frame Relay

Answer: ADF

72. Which additional configuration step is necessary in order to connect to an access point that has SSID
broadcasting disabled?

A. Set the SSID value in the client software to public.
B. Configure open authentication on the AP and the client.
C. Set the SSID value on the client to the SSID configured on the AP.
D. Configure MAC address filtering to permit the client to connect to the AP.

Answer: C

73. Why will a switch never learn a broadcast address?

A. Broadcasts only use network layer addressing.
B. A broadcast frame is never forwarded by a switch.
C. A broadcast address will never be the source address of a frame.
D. Broadcast addresses use an incorrect format for the switching table.
E. Broadcast frames are never sent to switches.

Answer: C

74. Refer to the graphic. Host A has established a connection with the HTTP server attached to interface E0 of the xyz router. Which of the following statements describe the information contained in protocol data units sent from host A to this server? (Choose three.)

A. The destination port number in a segment header will have a value of 80.
B. The destination port number in a segment header will have a unique value greater than or equal to 1023.
C. The destination address of a frame will be the MAC address of the HTTP server interface.
D. The destination address of a frame will be the MAC address of the E0 interface of the abc router.
E. The destination IP address of a packet will be the IP address of the E0 interface of the abc router.
F. The destination IP address of a packet will be the IP address of the network interface of the HTTP server.

Answer: ADF

75. What are two reasons a network administrator would use CDP? (Choose two.)

A. to verify the type of cable interconnecting two devices
B. to determine the status of network services on a remote device 
C. to obtain VLAN information from directly connected switches
D. to verify Layer 2 connectivity between two devices when Layer 3 fails
E. to obtain the IP address of a connected device in order to telnet to the device
F. to determine the status of the routing protocols between directly connected routers

Answer: DE

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