【单选题】
PPP协议中，（ ）主要用于协商在该数据链路上所传输的数据包的格式与类型。___
A. 链路控制协议
B. PPP扩展协议
C. 网络层控制协议
D. PAP、CHAP协议
E.
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相关试题
【单选题】
下面各项组播协议中，运行哪个协议的路由器负责管理组用户主机加入、离开，通过维护用户数据，发送组播数据到主机？（ ）___
A. IGMP
B. PIM-DM
C. PIM-SM
D. MSDP
E.
【单选题】
组播IP地址中，类似于单播地址中的私有IP的是哪个范围？（ ）___
A. 224.0.0.1～224.0.0.255
B. 224.0.1.0～231.255.255.255
C. 232.0.0.0～232.255.255.255
D. 239.0.0.0～239.255.255.255
E.
【单选题】
组播是指网络中点到多点的通信形式。组播技术的核心就是把报文复制工作尽可能的放到离接收者最近的地方来完成。在组播中，组播组的概念比较重要。组播组使用以下哪个范围的IP地址：（ ）___
A. 1.0.0.0～126.255.255.255
B. 127.0.0.0～191.255.255.255
C. 192.0.0.0～223.255.255.255
D. 224.0.0.0～239.255.255.255
E.
【单选题】
数据封装在数据链路层被称作（ ）___
A. 数据包
B. 数据段
C. 帧
D. 块
E.
【单选题】
主流的以太网交换机默认使用下面那种以太网的帧格式？（ ）___
A. 802.3
B. 802.2
C. ETHERNET II
D. SNAP
E.
【单选题】
以下哪个功能可以实现各类业务在网关上任意LAN端口的接入( ) ___
A. 全路由功能
B. 路由功能
C. DHCP功能
D. 桥接功能
E.
【单选题】
当部署QoS时，对数据的复杂分类通常部署在网络中的哪个部分( ) ___
A. 数据链路层
B. 边缘接入层
C. 汇聚层
D. 核心层
E.
【单选题】
从通信协议的角度来看，路由器是在哪个层次上实现网络互联（ ） ___
A. 物理层
B. 链路层
C. 网络层
D. 传输层
E.
【单选题】
FTP和TFTP是哪层的协议( )___
A. 物理层
B. 网络层
C. 传输层
D. 应用层
E.
【单选题】
选出基于TCP协议的应用程序（ ）___
A. PING
B. TFTP
C. TELNET
D. OSPF
E.
【单选题】
下面选项中，哪项不是数据链路层的主要功能（ ）___
A. 提供对物理层的控制
B. 差错控制
C. 流量控制
D. 决定传输报文的最佳路由
E.
【单选题】
当今世界上最流行的TCP/IP协议的层次并不是按OSI参考模型来划分的，相对应于OSI 的七层网络模型，没有定义的是（ ）___
A. 物理层与链路层
B. 链路层与网络层
C. 网络层与传输层
D. 会话层与表示层
E.
【单选题】
检验本机各端口的网络信息应用以下哪个命令（ ） ___
A. ping
B. tracert
C. Netstat
D. ipconfig
E.
【单选题】
以下哪个操作系统目前还未在网关或路由器上应用（ ） ___
A. Linux系统
B. Openwrt系统
C. Osgi系统
D. Andriod系统
E.
【单选题】
AAA不包括下面哪一项( )___
A. Authentication
B. Authority
C. Access
D. Accounting
E.
【单选题】
如何查看PC机的MAC地址与IP地址的映射的？（ ）___
A. arp –a
B. arp –d
C. show arp
D. arp show
E.
【单选题】
在IP地址规划中，通常采用以下哪种技术来提高地址的利用率（ ）___
A. VLSM
B. QinQ
C. MPLS
D. 以上都不是
E.
【单选题】
最常用的诊断故障的命令是ping，它使用了哪个协议？( )___
A. ARP
B. ICMP
C. RARP
D. PING
E.
【单选题】
172.16.10.9是哪类IP地址 ( )___
A. A类
B. B类
C. C类
D. D类
E.
【单选题】
B类地址的前缀范围是？（ ）___
A. 10000000-11111111
B. 00000000-10111111
C. 10000000-10111111
D. 10000000-11011111
E.
【单选题】
当端口的状态为 [ 端口－down 协议－up ] 时，意味着：( )___
A. 端口的链路已被断开，但是还能受到keep alive信号。
B. 端口已不能够收到keep alive信号，但能正常工作。
C. 端口坏了，应该换掉。
D. 端口不可能处于这种状态。
E.
【单选题】
工作在网络层的典型设备是（ ） ___
A. HUB
B. 接入交换机
C. 网管服务器
D. router
E.
【单选题】
查看丢包率，可以用Wireshark抓包后查看（ ）包的丢失率。___
A. RTP
B. UDP
C. MEGACO
D. ICMP
E.
【单选题】
广播报文的目的MAC地址是（ ）___
A. FFFFFFFFFFFF
B. 000000000000
C. 255.255.255.255
D. 0.0.0.0
E.
【单选题】
报文经过二层交换机转发后，以下说法哪个正确？（ ）___
A. 报文的源MAC、目的MAC会改变
B. 报文的源IP、目的IP会改变
C. 报文不会有任何改变
D. 报文的源MAC、目的MAC、源IP、目的IP都会改变
E.
【单选题】
当一台以太网交换机收到一个以太帧的时候，哪个MAC地址会被交换机学习并且保存到MAC地址表中？（ ）___
A. 以太帧的源MAC地址
B. 以太帧的目的MAC地址
C. 以太帧的源和目的MAC地址
D. 以上都不对
E.
【单选题】
以下关于LAN Switch的说法，正确的是（ ）___
A. LAN Switch主要根据数据包的MAC地址查找相应的IP地址，实现数据包的转发
B. LAN Switch可以不识别MAC地址，但是必须识别IP地址
C. 和共享式Hub比较起来，LAN Switch的一个端口可以说是一个单独的冲突域
D. LAN Switch在收到包含不能识别的MAC地址数据包时，将该数据包从所收到的端口直接送回去
E.
【单选题】
VLAN的划分不包括以下哪种方法？（ ）___
A. 基于端口
B. 基于MAC地址
C. 基于协议
D. 基于物理位置
E.
【单选题】
交换机中继链路（trunk link）打标签所依据的标准是（ ）___
A. 802.1Q
B. 802.1D
C. 802.3
D. 802.5
E.
【单选题】
在802.1Q协议中，对以太网帧中加入4 byte的VLAN信息，其中共有多少bit用来作为VLAN标识（ ）___
A. 8个
B. 10个
C. 12个
D. 16个
E.
【单选题】
配置组播时，需将（ ）端口加入组播Vlan。___
A. 用户端口
B. 上联口
C. 用户端口和上联口
D. 所有端口
E.
【单选题】
一个组播VLAN最多可以有（ ）个组播组。___
A. 128
B. 256
C. 512
D. 1024
E.
【单选题】
千兆以太网口的英文缩写是（ ）___
A. PE
B. GE
C. FE
D. SE
E.
【单选题】
网络中使用VLAN进行二层隔离，VLAN标准为( )。___
A. IEEE 802．1
B. IEEE 802．11
C. IEEE 802．1Q
D. IEEE 802．3
E.
【单选题】
为了防止网络风暴，应采用那种操作（ ）。___
A. 划分VLAN
B. 采用生成树协议（STP）
C. 黑洞路由
D. 端口环回
E.
【单选题】
下面关于VLAN描述正确的是( )___
A. 一个VLAN一个广播域
B. 一个VLAN一个冲突域
C. 一个VLAN只能包含一个物理端口
D. VLAN只能按照端口进行划分
E.
【单选题】
划分VLAN的主要作用是（ ）___
A. 隔离广播风暴，减少广播域
B. 绑定端口
C. 用于二层组网
D. 用于数据转发
E.
【单选题】
在VLAN的标签中，VLAN ID共占用（ ）比特。___
A. 24
B. 18
C. 16
D. 12
E.
【单选题】
在网络建设中为解决4K VLAN ID数量不够的问题，可以采用（ ）方式。___
A. VLAN聚合
B. QinQ
C. VLAN透传
D. VLAN终结
E.
【单选题】
关于VLAN下面说法错误的是（ ）。___
A. 隔离广播域
B. 相互间通信要通过路由器
C. 可以限制网上的计算机互相访问的权限
D. 只能在同一个物理网络上的主机进行逻辑分组
E.
推荐试题
【单选题】
- What do you think of the movie we saw last night?____
A. The actress is bad.
B. Terrific!
C. The theatre is bad.
D. Nobody was there.
【单选题】
___ No, thanks. I'm just looking around. I'll let you know if I want anything.
A. Could you help me?
B. What will you buy?
C. Can I help you?
D. Do you like to look around?
【单选题】
- Hello, Peter. What do you do?____
A. I am fine.
B. I am not sick.
C. I am a student from Bonn University.
D. I came from Bonn University.
【单选题】
-Excuse me; can I have a seat here?___
A. Be hurry.
B. Come on.
C. Yes, please.
D. Do you mind?
【单选题】
- Shall we sit up here on the grass or down there near the water?___
A. I'd rather stay here if you don't mind.
B. Sorry, I don't like neither.
C. Certainly, why not？
D. Yes, we like these two places.
【单选题】
- What do you do on Sunday?___
A. I 'm a teacher.
B. I play football.
C. You are a student.
D. They clean rooms.
【单选题】
- Our class won the girls' relay race in our school's sports meeting.___
A. That's right.
B. Thanks a lot.
C. Congratulations!
D. It's a pleasure.
【单选题】
- Hi, is Mary there, please?___
A. Hold on. I'll get her.
B. No, she isn't here.
C. Yes, she lives here.
D. Yes, what do you want?
【单选题】
- I am afraid I can't return the book to you before Friday. ___
A. Don't be afraid
B. Be careful
C. Not at all
D. Take your time
【单选题】
- I really don't know how to thank you enough. ___.
A. No problem
B. Think nothing of it
C. Not at all
D. It doesn't matter
【单选题】
- Must I be home before seven? ___.
A. No, you needn't
B. No, you mustn't
C. Yes, you will
D. No, you won't
【单选题】
-I'm sorry to hear that you failed in the exam______.
A. Not at all
B. Oh, thank you.That's very kind of you
C. You are welcome
D. Yes, I'm really sorry
【单选题】
-I will,______.
A. that's all right
B. thank you
C. all right
D. not at all
【单选题】
-Hello, may I speak to Zhao Hua?_____.
A. My name is Zhao Hua
B. I'm Zhao Hua
C. This is Zhao Hua speaking
D. Zhao Hua is me
【单选题】
___This is Mr Smith speaking now.
A. Who are you
B. Who is that
C. Who are you calling
D. What do you want to say
【单选题】
- I was worried about my maths, but Mr. Brown gave me an A.___
A. Don't worry about it.
B. Congratulations! That's a difficult course.
C. Mr. Brown is very good.
D. Good luck to you！
【单选题】
-Would you go to the concert with me?___, but I'm very busy now.
A. I'd like to
B. Sure
C. No problem
D. Certainly
【单选题】
-I'll be away on a business trip. Would you mind looking at my cat?Not at all. _______.
A. I have no time
B. I'd rather not
C. You can leave
D. I'd be happy to
【单选题】
- Hi, Jim! Nice to meet you.____.
A. Certainly
B. Many thanks
C. OK
D. Nice to meet you, too
【单选题】
- Hello, may I speak to Mike?_____
A. Who are you?
B. Sorry, he isn't in.
C. Thank you very much.
D. Yes, here you are.
【单选题】
- Will you join us for lunch?____.
A. No, I won't
B. Yes, with pleasure
C. Yes, please
D. Yes, help yourself
【单选题】
- Thank you for your great dinner. I really enjoyed it._____you enjoyed it.
A. I'm so glad
B. I'm sorry
C. What a pity
D. Surprisingly
【单选题】
- I heard Susan surprised her teacher by working hard. Yes, ___
A. her teacher worked hard.
B. Susan worked hard.
C. the teacher was surprising.
D. Susan was surprised.
【单选题】
- Peter, don't step on the grass_______.
A. It doesn't matter
B. I can't do it
C. Don't worry
D. Sorry, I won't do it again
【单选题】
- How was your journey to Paris? - ____
A. It went very well.
B. I flew there.
C. I love Paris.
D. Thank you for asking.
【单选题】
- I'm sorry for being late, Mr Lt______.
A. All right
B. That's right
C. Not at all
D. Never mind
【单选题】
- Happy birthday to you! ___!
A. Happy birthday to you
B. I'm very glad
C. That's all right
D. Thank you
【单选题】
- Do you like country music?___.
A. Yes, I like basketball a lot
B. It's far too crowded
C. Yes, I'm crazy about it
D. Oh, it's funny
【单选题】
- Have a cup of tea, ____? Thanks a lot.
A. don't you
B. haven't you
C. shall we
D. will you
【单选题】
- Thank God．It's Friday again．A nice weekend!___.
A. Me too
B. Yes，I'll be free then
C. That's all right
D. The same to you
【单选题】
— Write to me when you get home. OK, I ______.
A. must
B. should
C. will
D. can
【单选题】
Tom is so talkative. I’m sure you'll soon get tired ___ him.
A. of
B. with
C. at
D. on
【单选题】
I don't know ____ to deal with such matter.
A. what
B. how
C. which
D. /
【单选题】
___ is your girl friend like? She is very kind and good-looking.
A. How
B. What
C. Which
D. Who
【单选题】
He ___ driving me home, even though I told him I lived nearby.
A. insisted on
B. insisted at
C. insisted that
D. insisted in
【单选题】
We came finally ___the conclusion that she has been telling lies all the time.
A. of
B. into
C. to
D. at
【单选题】
I won’t make the___mistake next time.
A. like
B. same
C. near
D. similar
【单选题】
He ___lives in the house where he was born.
A. already
B. yet
C. still
D. ever
【单选题】
I am not used to speaking ___ public.
【单选题】
I didn’t know what to do, but then an idea suddenly ___to me.
A. appeared
B. happened
C. occurred
D. emerged
