2025年08月15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(2025/8/14)
试题1
下图中v0至v2的最短路径长度为 ( ) 。
A、90
B、60
C、70
D、100
查看答案
试题参考答案:B
试题2
在SNMPv2中,一个实体发送一个报文,一般经过四个步骤:
加入版本号和团体名,构造报文;
把PDU、源和目标端口地址以及团体名传送给认证服务,认证服务产生认证码或对数据进行加密,返回结果;
根据要实现的协议操作构造PDU;
进行BER编码,产生0/1比特串。
这四个步骤的正确次序是 ( ) 。
A、①③②④
B、③②①④
C、④①③②
D、②①③④
查看答案
试题参考答案:B
试题3
在防火墙域间安全策略中,不是outbound方向数据流的是( )。查看答案
试题参考答案:A
试题4
Software-defined networking(SDN)technology is an approachto(64)management that enables dynamic,progranmatically efficient network configuration in order to improve network performance and monitoring,in a manner more akin to(65)computing than to traditional network management. SDN archi tectures decouple network control and forwarding functions,enabling the network control to become directly(66)and the underlying infrastructure to be abstracted from applications and network services.SDN was commonly associated with the (67)protocol since the protocol's emergence in 2011. When using an SDN based model for transmitting multimedia traffic,an important aspect to take account is the(68)of Experience(QoE)estimation.To estimate theQoE,first we have to be able to classify the traffic and then,it's recommended that the system can solve critical problems on its own by analyzing the traffic.查看答案
试题参考答案:D、D、B、A、A
试题5
Network Addrees Translation(NAT) is an Internet standard that enables a local-area network to use one set of IP addresses for internet traffic and another set of ( ) IP addresses for external traffic. The main use of NAT is to limit the number of public IP addresses that an organization or company must use, for both economy and ( ) purposes. NAT remaps an IP address space into another by modifying network address information in the ( ) header of packets while they are in transit across a traffic routing device. It has become an essential tool in conserving global address space in the face of ( ) address exhaustion. When a packet traverses outside the local network, NAT converts the private IP address to a public IP address. If NAT runs out of public addresses,the packets will be dropped and ( )"host unreachable"packets will be sent.
(1) A. local
B. private
C. public
D. dynamic
(2) A. political
B. fairness
C. efficiency
D. security
(3) A.MAC
B. IP
C.TCP
D. UDP
(4) A. IPv4
B. IPv6
C. MAC
D. logical
(5) A. BGP
B. IGMP
C. ICMP
D. SNMP
查看答案
试题参考答案:C、D、B、A、C
试题6
4条路由:124.23.129.0/24,124.23.130.0/24,124.23.132.0/24和124.23.133.0/24经过汇聚后得到的网络地址是( )。查看答案
试题参考答案:A
试题7
下面关于 VTP 修剪的论述中,错误的是( )。
A.静态修剪就是手工剪掉中继链路上不活动的 VLAN
B.动态修剪使得中继链路上所有共享的 VLAN 都是活动的
C.静态修剪要求在 VTP 域中的所有交换机都配置成客户机模式
D.动态修剪要求在 VTP 域中的所有交换机都配置成服务器模式
查看答案
试题参考答案:C
试题8
以下关于以太网交换机的说法中,错误的是()。查看答案
试题参考答案:C
试题9
TCP是互联网中的传输层协议,TCP协议进行流量控制的方式是 (1) ,当TCP实体发出连接请求(SYN)后,等待对方的 (2) 相应。
(1)A、使用停等ARQ协议
B、使用后退N帧ARQ协议
C、使用固定大小的滑动窗口协议
D、使用可变大小的滑动窗口协议
(2)A、SYN
B、FIN、ACK
C、SYN、ACK
D、RST
查看答案
试题参考答案:D、C
试题10
对一个新的QoS通信流进行网络资源预约,以确保有足够的资源来保证所请求的QoS,该规则属于IntServ规定的4种用于提供QoS传输机制中的( )规则。查看答案
试题参考答案:A
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