第10題： 在路由器執(zhí)行（）命令可以查看到下面信息。

A.display current-configuration
B.display ip interface brief
C.display stp brief
D.display rip 1 route
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第11題： 下圖所示的網(wǎng)絡(luò)拓?fù)渲信渲昧薘IP協(xié)議，且RIP協(xié)議已更新完成。
下表所示為AR2路由器上查看到的路由信息。

從查看到的路由信息可以判斷（65），造成故障的原因是（66）。
（65）A.在AR2上ping172.16.0.1丟包
B.在AR1上ping3.3.3.3丟包
C.在AR1上ping172.16.1.1丟包
D.在AR3上ping1.1.1.1丟包
（66）A.在AR1上環(huán)回地址172.16.0.1配置錯誤
B.在AR3上環(huán)回地址172.16.1.1配置錯誤
C.RIPv1不支持無類網(wǎng)絡(luò)
D.RIPv2不支持無類網(wǎng)絡(luò)
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第12題： 下面關(guān)于路由器的描述中，正確的是（）。
A.路由器中串口與以太口必須是成對的
B.路由器中串口與以太口的IP地址必須在同一網(wǎng)段
C.路由器的串口之間通常是點對點連接
D.路由器的以太口之間必須是點對點連接
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第14題： 如果DHCP客戶端發(fā)現(xiàn)分配的IP地址已經(jīng)被使用，客戶端向服務(wù)器發(fā)出（）報文，拒絕該IP地址。
A.DHCPRelease
B.DHCPDecline
C.DHCPNack
D.DHCPRenew
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第15題： 在層次化園區(qū)網(wǎng)絡(luò)設(shè)計中，（）是匯聚層的功能。
A.高速數(shù)據(jù)傳輸
B.出口路由
C.廣播域的定義
D.MAC地址過濾
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第1題： With circuit switching,a（71）path is established between two stations for communication.Switching and transmission resources within the networkare（72）for the exclusive use of the circuit for the duration of the connection.The connection is（73）：Once it is established，it appears to attached devices as if there were a direct connection.Packet switching was designed to provide a more efficient facility than circuit switching for（74）data traffic.Each packet contains some portion of the user data plus control information needed for proper functioning of the network.A key distinguishing element of packet-switching networks is whether the internal operation is datagram or virtual circuit.With internal virtual circuits,a route is defined between two endpoints and all packets for that virtual circuit follow the（75）route,With internal datagrams,each packet is treated independently,and packets intended for the same destination may follow different routes.
71、A.unique
B.dedicated
C.nondedicated
D.independent
72、A.discarded
B.abandoned
C.reserved
D.broken
73、A.indistinct
B.direct
C.indirect
D.transparent
74、A.casual
B.bursty
C.limited
D.abundant
75、A.same
B.different
C.single
D.multiple
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