A.The transport layer divides a data stream into segments and may add reliability and flow control information.
B.The data link layer adds physical source and destination addresses and an FCS to the segment.
C.Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D.Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E.The presentation layer translates bits into voltages for transmission across the physical link.
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A.802.1Q native VLAN frames are untagged by default.
B.802.1Q trunking ports can also be secure ports.
C.802.1Q trunks can use 10 Mb/s Ethernet interfaces.
D.802.1Q trunks require full-duplex, point-to-point connectivity.
E.802.1Q trunks should have native VLANs that are the same at both ends.
A.it is a layer 2 messaging protocol which maintains vlan configurations across network.
B.it includes an 8-bit field which specifies the priority of a frame.
C.it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.
D.it modifies the 802.3 frame header，and thus requires that the FCS be recomputed.
E.it is a trunking protocol capable of carring untagged frames.
A.255.255.255.0
B.255.255.255.192
C.255.255.255.250
D.255.255.255.252
A.RSTP cannot operate with PVST+.
B.RSTP defines new port roles.
C.RSTP defines no new port states.
D.RSTP is a proprietary implementation of IEEE 802.1D STP.
E.RSTP is compatible with the original IEEE 802.1D STP.
A.redundant
B.spanned
C.provisioned
D.converged
最新試題
請(qǐng)參見圖示。當(dāng)計(jì)算機(jī)A 向計(jì)算機(jī)D 發(fā)送幀時(shí)，哪些計(jì)算機(jī)會(huì)接收該幀？（）
請(qǐng)參見圖示。公司路由器由于故障被更換。更換路由器之后，Education 辦公室內(nèi)的主機(jī)C 和D 能夠相互ping 通，但是無法訪問Accounts 辦公室內(nèi)的主機(jī)。此問題的原因可能是什么？（）
請(qǐng)參見圖示。主機(jī)A 正在訪問多臺(tái)服務(wù)器。結(jié)合使用什么端口號(hào)和地址即可唯一識(shí)別特定服務(wù)器上運(yùn)行的特定進(jìn)程？（）
請(qǐng)參見圖示。對(duì)于從主機(jī)A 向Web 服務(wù)器發(fā)出的網(wǎng)頁請(qǐng)求，正確的目的套接字?jǐn)?shù)字是什么？（）
在Cisco IOS 設(shè)備中，啟動(dòng)配置文件存儲(chǔ)于何處？（）
請(qǐng)參見圖示。某用戶想要查看當(dāng)前的配置。圖中所示為ipconfig/all 命令的輸出。從此輸出可以得到哪三項(xiàng)結(jié)論？（）
以下哪兩種介質(zhì)可提供高達(dá)1Gb/s 的帶寬？（）
路由器使用哪一項(xiàng)信息來確定源主機(jī)和目的主機(jī)之間的路徑？（）
請(qǐng)參見圖示。RouterB 已經(jīng)過正確配置。RouterA 的以太網(wǎng)接口Fa0/0已使用如圖所示的命令進(jìn)行配置。但是，從RouterA 的Fa0/0接口無法成功ping 通RouterB 的Fa0/0接口。應(yīng)在RouterA 上采取什么措施來解決此問題？（）
PC 無法連接到任何遠(yuǎn)程網(wǎng)站，無法ping 通其默認(rèn)網(wǎng)關(guān)，也無法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？（）