試題1

查看答案

試題2

3DES 的密鑰長(zhǎng)度為（ ）。
A．56
B．112
C．128
D．168

查看答案

試題3

Windows Server 2003中能夠發(fā)送SNMP請(qǐng)求報(bào)文并能對(duì)SNMP報(bào)文進(jìn)行解析的服務(wù)為  （1）  ；用以監(jiān)聽(tīng)被管主機(jī)發(fā)送來(lái)的陷入報(bào)文的服務(wù)為  （2）  。
（1）A、NMP Service
B、Task Scheduler
C、Terminal Services
D、SNMP Trap Service
（2）A、SNMP Service
B、Task Scheduler
C、Terminal Services
D、SNMP Trap Service

查看答案

試題4

查看答案

試題5

邊界網(wǎng)關(guān)協(xié)議BGP4是一種動(dòng)態(tài)路由發(fā)現(xiàn)協(xié)議，它的主要功能是（1） 。BGP路由器之間傳送的是AS路徑信息，這樣就解決了（2） 問(wèn)題。BGP4報(bào)文封裝在 （3）。
（1）A．發(fā)現(xiàn)新的路由
B.計(jì)算最短通路
C．控制路由策略
D．維護(hù)網(wǎng)絡(luò)拓?fù)鋽?shù)據(jù)庫(kù)
（2）A．路由環(huán)路
B．最短通路
C．路由計(jì)算
D．路由更新
（3）A.IP數(shù)據(jù)報(bào)
B．以太幀
C. TCP報(bào)文
D.UDP報(bào)文

查看答案

試題6

The usual way to ensure reliable delivery is to provide the  （1）  with some feedback about what is happening at the other end of the line. Typically, the protocol calls for the receiver to send back special  （2）  frame bearing positive or negative  （3）  about the incoming frames. If the sender receives a positive acknowledgement about a frame, it knows the the frame has arrived safely. On the other hand, a negative acknowledgement means that something has gone wrong, and the frame must be transmitted again.
An additional complication comes from the possibility that hardware troubles may cause a frame to  （4）  completely. In this case, the receiver will not react at all, since it has no any reason to react. It should be clear that a protocol in which the sender transmits a frame and then waits for an acknowledgement, positive or negative, will hang forever if a frame is ever lost due to, for example,  （5）  hardware.。
（1）A、receiver
B、controller
C、sender
D、customer
（2）A、data
B、controll
C、request
D、session
（3）A、application
B、connection
C、stream
D、acknowledgement
（4）A、vanish
B、vary
C、appear
D、incline
（5）A、acting
B、working
C、malfunctioning
D、functioning

查看答案

試題7

查看答案

試題8

假設(shè)系統(tǒng)有n個(gè)進(jìn)程共享資源R，且資源R的可用數(shù)為3，其中n≥3 。若采用PV操作，則信號(hào)量S的取值范圍應(yīng)為（9） 。
A．-1～n-1
B．B．-3～3
C．C．-（n-3）～3
D．D．-（n-l）～1

查看答案

試題9

查看答案

試題10

IEEE802.11g標(biāo)準(zhǔn)支持最高數(shù)據(jù)速率可達(dá)  （ ）  Mb/s。
A、5
B、11
C、54
D、100

查看答案