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試題1
以下關(guān)于三重DES加密的敘述中,正確的是()。查看答案
試題參考答案:B
試題2
在Windows XP中用事件查看器查看日志文件,可看到的日志包括 ( ) 。
A、用戶訪問(wèn)日志、安全性日志和系統(tǒng)日志
B、應(yīng)用程序日志、安全性日志和系統(tǒng)日志
C、網(wǎng)絡(luò)攻擊日志、安全性日志和記帳日志
D、網(wǎng)絡(luò)連接日志、安全性日志和服務(wù)日志
查看答案
試題參考答案:B
試題3
Traditional Internet access methods like dial-up were so slow that host computers were connected to the dial-up (1) at the customer premise over slow (2) ports. PPP was designed to run directly over these serial links. But with the advent of broadband Internet (3) technologies such as ADSL and cable modems there has been a considerable increase in the bandwidth delivered to the end users. This means that the host computers at the customer premise connect to the (4) or cable “modem” over a much faster medium such as Ethernet. It also means that multiple(5) can be connect to the Internet through the same connection.
(1)A、buffer
B、modem
C、computer
D、server
(2)A、parallel
B、digital
C、serial
D、variable
(3)A、access
B、cache
C、cast
D、storage
(4)A、FDDI
B、HDSL
C、ADSL
D、CDMA
(5)A、cables
B、hosts
C、servers
D、modems
查看答案
試題參考答案:B、C、A、C、B
試題4
多形病毒指的是 ( ) 的計(jì)算機(jī)病毒。
A、可在反病毒檢測(cè)時(shí)隱藏自己
B、每次感染都會(huì)改變自己
C、可以通過(guò)不同的渠道進(jìn)行傳播
D、可以根據(jù)不同環(huán)境造成不同破壞
查看答案
試題參考答案:B
試題5
( ) 不屬于PKI CA(認(rèn)證中心)的功能。
A、接受并驗(yàn)證最終用戶數(shù)字證書的申請(qǐng)
B、向申請(qǐng)者頒發(fā)或拒絕頒發(fā)數(shù)字證書
C、產(chǎn)生和發(fā)布證書廢止列表(CRL),驗(yàn)證證書狀態(tài)
D、業(yè)務(wù)受理點(diǎn)LRA的全面管理
查看答案
試題參考答案:D
試題6
在異步通信中,每個(gè)字符包含1位起始位、8位數(shù)據(jù)位、1位奇偶位和2位終止位,若有效數(shù)據(jù)速率為800b/s ,采用QPSK調(diào)制,則碼元速率為()波特。查看答案
試題參考答案:A
試題7
假設(shè)一個(gè)IP數(shù)據(jù)報(bào)總長(zhǎng)度為3000B,要經(jīng)過(guò)一段MTU為1500B的鏈路,該IP數(shù)據(jù)報(bào)必須經(jīng)過(guò)分片才能通過(guò)該鏈路。該原始IP數(shù)據(jù)報(bào)需被分成( )個(gè)片,若IP首部沒(méi)有可選字段,則最后一個(gè)片首部中Ofiset字段為( )。查看答案
試題參考答案:B、A
試題8
在Linux操作系統(tǒng)中把外部設(shè)備當(dāng)做文件統(tǒng)一管理,外部設(shè)備文件通常放在 ( ) 目錄中。
A、/dev
B、/lib
C、/etc
D、/bin
查看答案
試題參考答案:A
試題9
客戶端采用()報(bào)文來(lái)拒絕DHCP服務(wù)器提供的IP地址。查看答案
試題參考答案:B
試題10
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.查看答案
試題參考答案:B、C、D、B、A
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