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网络工程师每日一练试题内容(2023/9/19)
试题1
假设系统有n个进程共享资源R,且资源R的可用数为3,其中n≥3 。若采用PV操作,则信号量S的取值范围应为(9) 。
A.-1~n-1
B.B.-3~3
C.C.-(n-3)~3
D.D.-(n-l)~1
查看答案
试题参考答案:C
试题2
以太网协议中使用了二进制指数后退算法,其冲突后最大的尝试次数为()次。查看答案
试题参考答案:C
试题解析与讨论:www.cnitpm.com/st/418224343.html
试题3
SONET采用的成帧方法是()。查看答案
试题参考答案:C
试题解析与讨论:www.cnitpm.com/st/537061581.html
试题4
下图画出了曼彻斯特编码和差分曼彻斯特编码的波形图,实际传送的比特串为( )。查看答案
试题参考答案:C
试题5
我国自行研制的移动通信3G标准是 ( ) 。
A、TD-SCDMA
B、WCDMA
C、CDMA2000
D、GPRS
查看答案
试题参考答案:A
试题解析与讨论:www.cnitpm.com/st/85922958.html
试题6
在OSI参考模型中,实现端到端的应答、分组排序和流量控制功能的协议层是 ( ) 。
A、数据链路层
B、网络层
C、传输层
D、会话层
查看答案
试题参考答案:C
试题解析与讨论:www.cnitpm.com/st/84342904.html
试题7
在大型无线网络中,AP通常通过DHCP option( )来获取AC的IP地址。查看答案
试题参考答案:A
试题解析与讨论:www.cnitpm.com/st/459796509.html
试题8
SNMP采用UDP提供的数据报服务传递信息,这是由于( )。查看答案
试题参考答案:D
试题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
试题参考答案:B、C、B、A、D
试题解析与讨论:www.cnitpm.com/st/233861520.html
试题10
ICMP协议属于TCP/IP网络中的(1)协议,ICMP报文封装在(2)包中传送。查看答案
试题参考答案:B、A
试题解析与讨论:www.cnitpm.com/st/233481362.html
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