單項(xiàng)選擇題A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?()

A.This is a 10 Mb/s switch port.
B.This is a 100 Mb/s switch port.
C.This is an Ethernet port operating at half duplex.
D.This is an Ethernet port operating at full duplex.
E.This is a port on a network interface card in a PC


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1.單項(xiàng)選擇題Which spread spectrum technology does the 802.11b standard define for operation?()

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR, FHSS, and DSSS 

3.多項(xiàng)選擇題What are two recommended ways of protecting network device configuration files from outside network security threats? (Choose two.)()

A.Allow unrestricted access to the console or VTY ports.
B.Use a firewall to restrict access from the outside to the network devices.
C.Always use Telnet to access the device command line because its data is automatically encrypted.
D.Use SSH or another encrypted and authenticated transport to access device configurations.
E.Prevent the loss of passwords by disabling password encryption. 

7.單項(xiàng)選擇題The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command?()

A.This command should be executed from the global configuration mode.
B.The IP address 10.121.16.8 is the local router port used to forward data.
C.102 is the remote DLCI that will receive the information.
D.This command is required for all Frame Relay configurations.
E.The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC

9.多項(xiàng)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 

10.單項(xiàng)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 

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