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單項(xiàng)選擇題How does using the service password encryption command on a router provide additional security?（）

A.by encrypting all passwords passing through the router
B.by encrypting passwords in the plain text configuration file
C.by requiring entry of encrypted passwords for access to the device
D.by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
E.by automatically suggesting encrypted passwords for use in configuring the router

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1.多項(xiàng)選擇題A network administrator wants to ensure that only the server can connect to port Fa0/1 on a Catalyst switch. The server is plugged into the switch Fa0/1 port and the network administrator is about to bring the server online. What can the administrator do to ensure that only the MAC address of the server is allowed by switch port Fa0/1 (Choose two.)（）。

A.Configure port Fa0/1 to accept connections only from the static IP address of the server.
B.Employ a proprietary connector type on Fa0/1 that is incompatible with other host connectors.
C.Configure the MAC address of the server as a static entry associated with port Fa0/1.
D.Bind the IP address of the server to its MAC address on the switch to prevent other hosts from spoofing the server IP address.
E.Configure port security on Fa0/1 to reject traffic with a source MAC address other than that of the server.
F.Configure an access list on the switch to deny server traffic from entering any port other than Fa0/1.

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2.多項(xiàng)選擇題Which two are features of IPv6？（）

A.multicast
B.broadcast
C.allcast
D.podcast
E.anycast

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3.單項(xiàng)選擇題在一個(gè)共享的雙絞線的網(wǎng)絡(luò)上的接口上產(chǎn)生了沖突檢測(cè)和載波偵聽.通過(guò)這個(gè)描述，關(guān)于這個(gè)網(wǎng)絡(luò)接口你知道了什么？（）

A.這是一個(gè)10Mb/s的交換端口
B.這是一個(gè)100Mb/s的交換端口
C.這是一個(gè)工作在半雙工模式下的以太口
D.這是一個(gè)工作在全雙工模式下的以太口
E.這是一個(gè)PC機(jī)上網(wǎng)卡上的一個(gè)接口

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4.單項(xiàng)選擇題What is the maximum data rate specified for IEEE 802.11b WLANs?（）

A.10 Mbps
B.11 Mbps
C.54 Mbps
D.100 Mbps

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5.單項(xiàng)選擇題 根據(jù)下圖，假設(shè)所有路由器接口都配置正確且正常工作，假設(shè)R2上OSPF配置正確，配置在R1上默認(rèn)路由會(huì)怎么影響R2的工作？（）

A.任何到達(dá)一個(gè)和路由器R1非直連的網(wǎng)絡(luò)的數(shù)據(jù)包都會(huì)被丟棄
B.任何到達(dá)一個(gè)和路由器R2非直連的網(wǎng)絡(luò)的數(shù)據(jù)包都會(huì)被丟棄
C.任何到達(dá)一個(gè)和路由器R2非直連的網(wǎng)絡(luò)的數(shù)據(jù)包都會(huì)即時(shí)被丟棄，因?yàn)镽1上缺少網(wǎng)關(guān)
D.直連在R2上的網(wǎng)絡(luò)將不能夠和172.16.100.0，172.16.100.128，172.16.100.64這些子網(wǎng)通訊
E.任何目的地沒(méi)有在R2的路由表中的數(shù)據(jù)包，R2將會(huì)定向到R1，R1會(huì)發(fā)送哪個(gè)數(shù)據(jù)包到R2，這樣路由環(huán)路產(chǎn)生

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