题库·华为认证
计算机类华为认证
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多选题

基于距离矢量算法的路由协议包括：（ ）

A
ICMP
B
RIP
C
IGRP
D
OSPF
E
IS-IS

题目答案

BC

答案解析

暂无解析
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举一反三
多选题

Which three of the protocols below belong to the application layer? (Select three answer choices)

A
ARP
B
HTTPS
C
SMTP
D
CDP
E
TFTP
F
ICMP

题目答案

BCE

答案解析

解析：EXPLANATION:THE APPLICATION LAYER IS THE HIGHEST OSI LAYER, AND PROTOCOLS AT THIS LAYER ARE END-USER ORIENTED. HTTPS SO PEOPLE CAN GET INFORMATION ON THE INTERNET, SMTP SO PEOPLE CAN MANAGE NETWORKS, AND TFTP SO PEOPLE CAN DOWNLOAD FILES.INCOR
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多选题

What are two characteristics of "store and forward" switching? (Select two answer choices)

A
Latency fluctuates regardless of frame. size.
B
The switch receives the complete frame. before beginning to forward it.
C
Latency through the switch varies with frame. length.
D
The switch checks the destination address upon receipt of headers.

题目答案

BC

答案解析

Explanation:With store-and-forward, the entire frame. is received by the switch before the first bit of the frame. is forwarded. As soon as the incoming switch port receives enough of the frame. to see the destination MAC address, the forwarding deci
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多选题

ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets? (Choose two)

A
They acknowledge receipt of TCP segments.
B
They guarantee datagram delivery.
C
They can provide hosts with information about network problems.
D
They are encapsulated within IP datagrams.
E
They are encapsulated within UDP datagrams.
F
They are encapsulated within TCP datagrams.

题目答案

CD

答案解析

解析：EXPLANATION:PING MAY BE USED TO FIND OUT WHETHER THE LOCAL MACHINES ARE CONNECTED TO THE NETWORK OR WHETHER A REMOTE SITE IS REACHABLE. THIS TOOL IS A COMMON NETWORK TOOL FOR DETERMINING THE NETWORK CONNECTIVITY WHICH USES ICMP PROTOCOL INSTEAD O
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多选题

Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)

A
The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.
B
The DHCP Discover message uses UDP as the transport layer protocol.
C
The DHCP Discover message uses a special Layer 2 multicast address as the destination address.
D
The DHCP Discover message uses TCP as the transport layer protocol.
E
The DHCP Discover message does not use a Layer 2 destination address.
F
The DHCP Discover message does not require a transport layer protocol.

题目答案

AB

答案解析

解析：EXPLANATION:DHCP USES UDP AS ITS TRANSPORT PROTOCOL. DHCP MESSAGES FROM A CLIENT TO A SERVER ARE SENT TO THE DHCP SERVER PORT (UDP PORT 67), AND DHCP MESSAGES FROM A SERVER TO A CLIENT ARE SENT TO THE DHCP CLIENT PORT (UDP PORT 68).THE CLIENT BRO
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多选题

华为DTMU单板功能包括()

A
支持多种时钟源:外部GPS输入、BITS同步时钟输入
B
支持8路数字量告警输入,其中2路固定为防雷失效告警检测
C
支持2路扩展数字量控制信号输出
D
默认配置支持4路E1输入,如有特殊要求,提供8路E1输入

题目答案

ABD

答案解析

暂无解析
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多选题

站点开通后,当地拨测发现无法起呼的现象,关于这种现象可能出现的原因有()

A
BSC里的CGI无定义
B
MSC里的CGI定义错误
C
小区名定义错误
D
PCU里的CGI定义错误

题目答案

AB

答案解析

暂无解析
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多选题

下列所述的哪些是ICMP协议的功能？ （ ）

A
报告TCP连接超时信息
B
重定向UDP消息
C
转发SNMP数据
D
查找子网掩码
E
报告路由更新错误信息

题目答案

ABE

答案解析

网际控制消息协议ICMP是一个网络层的协议，它提供了错误报告和其它回送给源点的关于IP数据包处理情况的消息。ICMP通常为IP或者更高层协议使用，一些ICMP报文把差错报文返回给用户进程。
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多选题

BTS3012基站,时钟出现参考源异常,可能的原因是()

A
基站传输问题
B
DTMU单板问题
C
BSC的时钟偏移、MSC时钟正常
D
MSC时钟偏移、BSC的时钟正常

题目答案

ABC

答案解析

暂无解析
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