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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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1.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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2.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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3.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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4.單項(xiàng)選擇題Which command enables RSTP on a switch？（）

A.spanning-tree mode rapid-pvst
B.spanning-tree uplinkfast
C.spanning-tree backbonefast
D.spanning-tree mode mst

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5.單項(xiàng)選擇題Why would a network administrator configure port security on a switch（）。

A.to prevent unauthorized Telnet access to a switch port
B.to limit the number of Layer 2 broadcasts on a particular switch port
C.to prevent unauthorized hosts from accessing the LAN
D.to protect the IP and MAC address of the switch and associated ports
E.to block unauthorized access to the switch management interfaces over common TCP ports

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6.單項(xiàng)選擇題Hosts on the same VLAN can communicate with each other but are unable to communicate with hosts on different VLANs. What is needed to allow communication between VLANs（）。

A.a switch with a trunk link that is configured between the switches
B.a router with an IP address on the physical interface that is connected to the switch
C.a switch with an access link that is configured between the switches
D.a router with subinterfaces configured on the physical interface that is connected to the switch

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7.單項(xiàng)選擇題There are no boot system commands in a router configuration in NVRAM.What is the fall back sequence that router will use to find an ios during reload？（）

A.Flash，TFTPserver，ROM
B.Flash，NVRAM，ROM
C.ROM，NVRAM，TFTPserver
D.NVRAM，TFTPserver，ROM
E.TFTPserver，F(xiàn)lash，NVRAM

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8.單項(xiàng)選擇題 根據(jù)下圖，Switch1剛剛完成重啟，并完成上電自檢。HostA發(fā)送它的第一個(gè)偵到HostC，交換機(jī)首先會(huì)對(duì)switching table做什么操作（）

A.Switch1會(huì)添加192.168.23.4到switchingtable
B.Switch1添加192.168.23.12到switchingtable
C.Switch1添加000A 8A47.E612到switchingtable
D.Switch1添加000B DB95.2EE9到switchingtable

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9.單項(xiàng)選擇題哪種擴(kuò)頻技術(shù)是802.11B定義使用的？（）

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR，F(xiàn)HSS，and DSSS

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10.單項(xiàng)選擇題What is the effect of the following access list condition access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。

A.permit all packets matching the first three octets of the source address to all destinations
B.permit all packets matching the last octet of the destination address and accept all source addresses
C.permit all packets from the third subnet of the network address to all destinations
D.permit all packets matching the host bits in the source address to all destinations
E.permit all packets to destinations matching the first three octets in the destination address

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