試題1

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試題2

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試題3

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試題4

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試題5

在Linux系統(tǒng)中，要查看如下輸出，可使用命令（32）。

A.[root@localhost]#ifconfig
B.[root@localhost]#ipconfig eth0
C.[root@localhost]#ipconfig]
D.[root@localhost]#ifconfig eth0

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試題6

在輸入輸出控制方法中，采用　（ ）　可以使得設(shè)備與主存間的數(shù)據(jù)塊傳送無(wú)需CPU干預(yù)。
A、程序控制輸入輸出
B、中斷
C、DMA
D、總線控制

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試題7

在瀏覽器的地址欄中輸入 xxxyftp.abc.com.cn，該 URL 中（ ）是要訪問(wèn)的主機(jī)名。
A．xxxyfip
B．a(chǎn)bc
C．com
D．Cn

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試題8

下面關(guān)于幾個(gè)網(wǎng)絡(luò)管理工具的描述中，錯(cuò)誤的是  （ ）  。
A、netstat可用于顯示IP、TCP、UDP、ICMP等協(xié)議的統(tǒng)計(jì)數(shù)據(jù)
B、sniffer能夠使網(wǎng)絡(luò)接口處于雜收模式，從而可截獲網(wǎng)絡(luò)上傳輸?shù)姆纸M
C、winipcfg采用MS-DOS工作方式顯示網(wǎng)絡(luò)適配器和主機(jī)的有關(guān)信息
D、tracert可以發(fā)現(xiàn)數(shù)據(jù)包到達(dá)目標(biāo)主機(jī)所經(jīng)過(guò)的路由器和到達(dá)時(shí)間

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試題9

The TCP protocolis a (1) layer protocol. Each connection connects two TCPs that may be just one physical network apart or located on opposite sides ofthe globe. In other words, each connection creates a (2) witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. Selecting afixed retransnussion time for all connections can result in serious consequences. Ifthe retransmission time does not allow enough time for a (3) to reach the destination and an acknowledgment to reach the source, it can result in retransmission of segments that are still on the way. Conversely, if the retransnussion time is longer than necessary for a short path, it may result in delay for the application programs.Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive (4)faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. Retransmission time can be made(5)  by basing it on the round-trip time (RTT). Several formulas are used for this purpose.
（1）A、physical
B、network
C、transport
D、application
（2）A、path
B、window
C、response
D、process
（3）A、process
B、segment
C、program
D、user
（4）A、connections
B、requests
C、acknowledgments
D、datagrams
（5）A、long
B、short
C、fixed
D、dynamic

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試題10

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