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網(wǎng)絡(luò)工程師每日一練試題內(nèi)容(2023/9/19)
試題1
假設(shè)系統(tǒng)有n個進程共享資源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
試題參考答案:C
試題2
以太網(wǎng)協(xié)議中使用了二進制指數(shù)后退算法,其沖突后最大的嘗試次數(shù)為()次。查看答案
試題參考答案:C
試題3
SONET采用的成幀方法是()。查看答案
試題參考答案:C
試題4
下圖畫出了曼徹斯特編碼和差分曼徹斯特編碼的波形圖,實際傳送的比特串為( )。查看答案
試題參考答案:C
試題5
我國自行研制的移動通信3G標準是 ( ) 。
A、TD-SCDMA
B、WCDMA
C、CDMA2000
D、GPRS
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試題參考答案:A
試題6
在OSI參考模型中,實現(xiàn)端到端的應(yīng)答、分組排序和流量控制功能的協(xié)議層是 ( ) 。
A、數(shù)據(jù)鏈路層
B、網(wǎng)絡(luò)層
C、傳輸層
D、會話層
查看答案
試題參考答案:C
試題7
在大型無線網(wǎng)絡(luò)中,AP通常通過DHCP option( )來獲取AC的IP地址。查看答案
試題參考答案:A
試題8
SNMP采用UDP提供的數(shù)據(jù)報服務(wù)傳遞信息,這是由于( )。查看答案
試題參考答案:D
試題9
A transport layer protocol usually has several responsibilities .One is to create a process-to-process communication;UDP uses (1)numbers to accomplish this.Another Responsibility is to provide control mechanisms at the transpt level.UDP does this task at a very minimal level.There is no flow control mechanism and there Is no(2) for received packet. UDP,however ,does provide error control to some extent.If UDP detects an error in the received packet,it will silently drop it.The transport layer also provides a connection mechanism for the processes.The(3)must be able to send streams of data to the transport layer.It is the responsibility of the transport layer at (4)station to make the connection with the receiver.chop the stream into transportable units,number them,and send them one by one.It is the responsibility of th transorort layer at the receiving end to wait until all the different units belong to th same process have arrived,check and pass those that are(5) free ,and deliver them to the receiving process as a stream. (1)A. hop
B. port
C. route
D.packet
(2)A. connection
B. window
C. acknowledgement
D.destination
(3)A. jobs
B. processes
C. proarams
D.users
(4)A. sending
B. routing
C. switching
D.receiving
(5)A. call
B. state
C. cost
D.error
查看答案
試題參考答案:B、C、B、A、D
試題10
ICMP協(xié)議屬于TCP/IP網(wǎng)絡(luò)中的(1)協(xié)議,ICMP報文封裝在(2)包中傳送。查看答案
試題參考答案:B、A
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