A.Filtering can occur based on Layer 3 information.
B.Broadcasts are eliminated.
C.Routers generally cost less than switches.
D.Broadcasts are not forwarded across the router.
E.Adding a router to the network decreases latency.
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A.remote DLCI on the main interface
B.local DLCI on the main interface
C.local DLCI on the subinterface
D.remote DLCI on the subinterface
根據(jù)下圖,該access list被配置在路由器RTB的S0/0接口上的OUT方向,哪兩個(gè)數(shù)據(jù)包會(huì)被DENY,如果被路由到該接口上的話?()
A.source ip address:192.168.15.5 destination port:21
B.source ip address:192.168.15.37 destination port:21
C.ssource ip address192.168.15.41 destination port:21
D.source ip address:192.168.15.36 destination port:23
E.source ip address:192.168.15.46 destination port:23
F.source ip address:192.168.15.49 destination port:23
A.The PC has connectivity with a local host.
B.The PC has connectivity with a Layer 3 device.
C.The PC has a default gateway correctly configured.
D.The PC has connectivity up to Layer 5 of the OSI model.
E.The PC has the TCP/IP protocol stack correctly installed.
A.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B.Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made,and another address is then assigned.
C.Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.
D.Addresses are permanently assigned so that the host uses the same address at all times.
A.允許unrestricted訪問到console或VTY口
B.用防火墻去限制外網(wǎng)的網(wǎng)絡(luò)設(shè)備訪問
C.因?yàn)閿?shù)據(jù)被自動(dòng)加密,所以總是允許使用TELNET命令訪問網(wǎng)絡(luò)設(shè)備的命令行
D.使用SSH或其他加密、認(rèn)證機(jī)制去訪問設(shè)備的配置
E.為了避免丟失密碼,所以不對(duì)密碼進(jìn)行加密(明文)
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請(qǐng)參見圖示。主機(jī)B 嘗試與主機(jī)C 建立TCP/IP 會(huì)話。在嘗試期間,San Francisco 器由器的FastEthernet 接口fa0/1捕獲到一個(gè)幀。捕獲的幀中包含源IP 地址為10.10.1.2而目的IP 地址為10.31.1.20的數(shù)據(jù)包。捕獲該幀時(shí),它的目的MAC 地址是什么?()
請(qǐng)參見圖示。主機(jī)A 嘗試與主機(jī)C 建立TCP/IP 會(huì)話。在嘗試期間,路由器Y 的FastEthernet 接口fa0/1捕獲到一個(gè)幀。捕獲的幀中包含源IP 地址為172.16.1.5而目的IP 地址為172.16.7.24的數(shù)據(jù)包。捕獲該幀時(shí),它的源MAC 地址是什么?()
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PC 無(wú)法連接到任何遠(yuǎn)程網(wǎng)站,無(wú)法ping 通其默認(rèn)網(wǎng)關(guān),也無(wú)法ping 通本地網(wǎng)段中工作正常的打印機(jī)。以下哪項(xiàng)操作可以確認(rèn)此PC 上的TCP/IP 協(xié)議棧是否工作正常?()
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路由器使用哪一項(xiàng)信息來(lái)確定源主機(jī)和目的主機(jī)之間的路徑?()
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請(qǐng)參見圖示。已啟用路由器的NAT 功能供PC 訪問Internet。可以為路由器接口S0/0/0分配下列哪一個(gè)IP 地址?()
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