2022年08月26日来源：信管网 作者:cnitpm
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网络工程师每日一练试题内容（2022/8/25）
试题1
在BGP4协议中，路由器通过发送( 1 )报文将正常工作信息告知邻居。当出现路由信息的新增或删除时，采用( 2 )报文告知对方。查看答案
试题参考答案：C、B
试题2
Traditional IP packet forwarding analyzes the （ 1）IP address contained in then network layee header of each packet as the packet rravels from its sourse to its final destination. A router analyzes the destination IP address independently at each hop in the network. Dynamic （ 2） protocols or staitic configuration builds the database needed to analyze the destination IP address(the routing table). The process of implementing traditional IP routing also is called hop-by-hop destination-based （ 3）routing. Although successful,and obviously widely deployed,certain restrictions,which have been realized for some time,exist for this method of packet forwarding that diminish its （ 4）.New techniques are therefore required to address and expand the functionality of an IP-based network infrastructure. This first chapter concertrates on idenfifying these restrictions.and presents a new architecture,known as multiprotocol（ 5）switching,that provides solutions to some of this restrictions. ( 1).A.datagram
B.destination
C.connection
D.service
( 2).A.routing
B.forwarding
C.transmission
D.managerment
( 3).A.anycast
B.multicast
C.broadcast
D.unicast
( 4).A.reliability
B.flexibility
C.stability
D.capability
( 5).A.cost
B.cast
C.mark
D.label
查看答案
试题参考答案：B、A、D、B、D
试题3
下面4个主机地址中属于网络110.17.200.0/21的地址是（53） 。
A. 110.17.198.0
B. 110.17.206.0
C. 110.17.217.0
D. 110.17.224.0
查看答案
试题参考答案：B
试题4
WWW系统采用的传输协议是（ ）查看答案
试题参考答案：C
试题5
设有下面4条路由：196.34.129.0/24、196.34.130.0/24、196.34.132.0/24和196.34.133.0/24，如果进行路由汇聚，能覆盖这4条路由的地址是（ ）查看答案
试题参考答案：A
试题6
参加下面的网络连接图，4个选项是Host A的ARP表，如果HostA ping HostB,则ARP表中的哪一选项用来封装传输的帧？（）。
A. A
B. B
C. C
D. D
查看答案
试题参考答案：D
试题7
假设某公司有8000台主机，采用CIDR方法进行划分，则至少给它分配（1）个C类网络。如果192.168.210.181是其中一台主机地址，则其网络地址为（2）。查看答案
试题参考答案：D、A
试题8
The TCP protocolis a (1) layer protocol. Each connection connects two TCPs that may be just one physical network apart or located on opposite sides ofthe globe. In other words, each connection creates a (2) witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. Selecting afixed retransnussion time for all connections can result in serious consequences. Ifthe retransmission time does not allow enough time for a (3) to reach the destination and an acknowledgment to reach the source, it can result in retransmission of segments that are still on the way. Conversely, if the retransnussion time is longer than necessary for a short path, it may result in delay for the application programs.Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive (4)faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. Retransmission time can be made(5) by basing it on the round-trip time (RTT). Several formulas are used for this purpose.
（1）A、physical
B、network
C、transport
D、application
（2）A、path
B、window
C、response
D、process
（3）A、process
B、segment
C、program
D、user
（4）A、connections
B、requests
C、acknowledgments
D、datagrams
（5）A、long
B、short
C、fixed
D、dynamic
查看答案
试题参考答案：C、A、B、C、D
试题解析与讨论：www.cnitpm.com/st/92823196.html
试题9
在（）校验方法中，采用模2运算来构造校验位。查看答案
试题参考答案：D
试题10
Blowfish加密算法的分组长度是（ ）。查看答案
试题参考答案：A
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