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網(wǎng)絡(luò)工程師每日一練試題內(nèi)容(2024/3/23)
試題1
Although a given waveform may contain frequencies over a very broad range, as a practical matter any transmission system will be able to accommodate only a limited band of (1) . This, in turn, limits the data rate that can be carried on the transmission (2) . A square wave has an infinite number of frequency components and hence an infinite (3) .However, the peak amplitude of the kth frequency component, kf, is only 1/k, so most of the (4) in this waveform is in the first few frequency components. In general, any digital waveform will have (5) bandwidth. If we attempt to transmit this waveform as a signal over any medium, the transmission system will limit the bandwidth that can be transmitted.
(1)A、frequencies
B、connections
C、diagrams
D、resources
(2)A、procedures
B、function
C、route
D、medium
(3)A、source
B、bandwidth
C、energy
D、cost
(4)A、frequency
B、energy
C、amplitude
D、phase
(5)A、small
B、limited
C、infinite
D、finite
查看答案
試題參考答案:A、D、B、B、C
試題2
IPv6地址的長度為:查看答案
試題參考答案:D
試題3
在單指令流多數(shù)據(jù)流計算機(SIMD)中,各處理單元必須( )
A、以同步方式,在同一時間內(nèi)執(zhí)行不同的指令
B、以同步方式,在同一時間內(nèi)執(zhí)行同一條指令
C、以異步方式,在同一時間內(nèi)執(zhí)行不同的指令
D、以異步方式,在同一時間內(nèi)執(zhí)行同一條指令
查看答案
試題參考答案:B
試題4
在SNMPv2中,一個實體發(fā)送一個報文,一般經(jīng)過四個步驟:
加入版本號和團體名,構(gòu)造報文;
把PDU、源和目標(biāo)端口地址以及團體名傳送給認(rèn)證服務(wù),認(rèn)證服務(wù)產(chǎn)生認(rèn)證碼或?qū)?shù)據(jù)進行加密,返回結(jié)果;
根據(jù)要實現(xiàn)的協(xié)議操作構(gòu)造PDU;
進行BER編碼,產(chǎn)生0/1比特串。
這四個步驟的正確次序是 ( ) 。
A、①③②④
B、③②①④
C、④①③②
D、②①③④
查看答案
試題參考答案:B
試題5
Certificates are (1) documents attesting to the (2) of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to (3) someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a certificate also contains an (4) date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital (5) of the certificate issuer. The most widely accepted format for certificates is X.509 , thus, Certificates can be read or written by any application complying with X.509.
(1)A、text
B、data
C、digital
D、structured
(2)A、connecting
B、binding
C、composing
D、conducting
(3)A、impersonate
B、personate
C、damage
D、control
(4)A、communication
B、computation
C、expectation
D、expiration
(5)A、signature
B、mark
C、stamp
D、hypertext
查看答案
試題參考答案:C、B、A、D、A
試題6
在SNMP中,管理進程查詢代理中一個或多個變量的值所用報文名稱為?。?) ,該報文的缺省目標(biāo)端口是?。?) 。
(1)A、get-request
B、set-request
C、get-response
D、trap
(2)A、160
B、161
C、162
D、163
查看答案
試題參考答案:A、B
試題7
光纖布線系統(tǒng)的測試指標(biāo)不包括 ( ) 。
A、最大衰減限值
B、波長窗口參數(shù)
C、回波損耗限值
D、近端串?dāng)_
查看答案
試題參考答案:D
試題8
某公司中,最大的局域網(wǎng)可容納200個主機,最小的局域網(wǎng)可容納20個主機,若使用可變長子網(wǎng)掩碼劃分子網(wǎng),其最長的掩碼(1)位,最短的掩碼(2)位。查看答案
試題參考答案:D、A
試題9
在交換機上執(zhí)行display stp topology-change命令,其作用是()。查看答案
試題參考答案:D
試題10
下面D類地址中,可用于本地子網(wǎng)作為組播地址分配的是(1),一個組播組包含4個成員,當(dāng)組播服務(wù)發(fā)送信息時需要發(fā)出(2)個分組。
(1)A.224.0.0.1
B.224.0.1.1
C.234.0.0.1
D.239.0.1.1
(2)A.1
B.2
C.3
D.4
查看答案
試題參考答案:D、A
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