【单选题】
QUESTION 251如下图所示，IPSec传输模式中AH的头部应该插入到以下哪个位置？___
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【单选题】
QUESTION 252以下哪种远程登录方式最安全？ ___
A. Telnet
B. Stelnet v100
C. Stelnet v2
D. Stelnet v1
【单选题】
QUESTION 253以下业务模块的ACL默认动作为permit的是？___
A. HTTP
B. SNMP
C. Telnet
D. 流策略
【单选题】
QUESTION 254 IPv6地址2019::8:AB对应的Solicited-node组播地址为？___
A. FF02::1:FF08:AB
B. FF02::FF08:AB
C. FF02::1:FE08:AB
D. FF02::1:FF20:19
【单选题】
QUESTION 255 DHCPv6客户端发送的DHCPv6请求报文的目的端口号为？___
A. 546
B. 548
C. 547
D. 549
【单选题】
QUESTION 257 IPv6报文头比IPv4报文头增加了哪个字段？___
A. Version
B. Flow Label
C.
D. estination Address
【单选题】
项设备的报文处理复杂度？___
A. 最后一跳和倒数第二跳设备
B. 倒数第二跳设备
C. 全部MPLS网络设备
D. 最后一跳设备
【单选题】
QUESTION 263 交换机收到一个单播数据帧，如果该数据帧目的MAC在MAC地表中能够找到，这此数据帧一定会从此MAC 对应端口转发出去。___
【单选题】
QUESTION 264 某台交换机STP端口输出信息如下：下列说法错误的是？___
A. 该交换机非根桥
B. Forward-delay为20s
C. 配置BPDU的MaxAge为20s
D. 该端口发送配置BPDU的周期为2s
【单选题】
QUESTION 266 现有一台交换机通过一个端口和对端设备的指定端口直连，但是该端口不转发任何报文，却可以通过接收 BPDU来监听网络变化，那么该端口的角色应该是（）。___
A. Root端口C
B. Designated端口
C. Alternate端口
D. Disable端口
【单选题】
QUESTION 267 交换机MAC地址表如下，下列说法正确的有？___
A. 交换机收到目的MAC地址为5489-9811-0b49的数据帧一定会丢弃
B. 交换机收到目的MAC地址为5489-9885-18a8的数据帧一定会丢弃
C. 交换机收到源MAC地址为5489-9811-0b49的数据帧一定会丢弃
D. 交换机收到目的MAC地址为5489-989d-1d30的数据帧一定会丢弃
【单选题】
QUESTION 268 运行STP的设备收到RSTP的配置BPDU时会丢弃。___
【单选题】
QUESTION 269STP协议当指定端口收到比自己差的配置BPDU时，立刻向下游发送自己的BPDU。___
【单选题】
QUESTION 270 STP下游设备通知上游设备发生拓扑变化时发送的报文是？___
A. TCA报文
B. TC报文
C. 配置BPDU
D. TCN BPDU
【单选题】
QUESTION 272 RSTP中Backup端口可以替换发生故障的根端口。___
【单选题】
QUESTION 274 VRP支持OSPF多进程，如果在启用OSPF时不指定进程号，则默认使用的进程号码是（）。___
【单选题】
QUESTION 276 ip route-static 10.0.12.0 255.255.255.0 192.168.1.1 关于此命令描述正确的是___
A. 如果路由器通过其他协议学习到和此路由相同目的网络的路由，路由器将会优先选择此路由
B. 此命令配置了一条到达10.0.12.0网络的路由
C. 该路由的优先级为100
D. 此命令配置了一条到达192.168.1.1网络的路由
【单选题】
QUESTION 277 OSPF协议使用哪种状态表示邻居关系已经建立？___
A. 2-way
B. Down
C. Attempt
D. Full
【单选题】
QUESTION 278 缺省情况下，广播网络上OSPF协议HELLO报文发送的周期为？___
A. 10s
B. 40s
C. 30s
D. 20s
【单选题】
QUESTION 281 两台路由器通过PPP链路互连，管理员在两台路由器上配置了OSPF，且运行在同一个区域中，如果它们的 Router ID相同，则下面描述正确的（）。___
A. 两台路由器将会建立正常的完全邻居关系
B. 两台路由器将不会互相发送hel1o信息
C. 两台路由器将会建立正常的完全邻接关系
D. VRP会提示两台路由器的Router ID冲突
【单选题】
QUESTION 282 下面哪个OSPF版本适用于IPv6？___
A. OSPFv1
B. OSPFv3
C. OSPFv4
D. OSPFv2
【单选题】
QUESTION 285 一台windows主机初次启动，如果无法从DHCP服务器处获取地址，那么此主机可能会使用下列哪一个IP地 址？___
A. 127.0.0.1
B. 169.254.2.33
C. 255.255.255.255
D. 0.0.0.0
【单选题】
QUESTION 286 DHCP DISCOVER报文的主要作用是？___
A. 客户端用来寻找DHCP服务器
B. DHCP服务器用来响应DFHCP DISCOVER报文，此报文携带了各种配置信息
C. 服务器对REQUEST报文的确认响应
D. 客户端请求配置确认，或者续借租期
【单选题】
QUESTION 287 如图所示，两台主机通过单常路由实现机间通信，当可的G0/0/1.2子接口收到主机B发送给主机A的数据帧 时，RTA将执行下面哪项操作？___
A. RTA将丢弃该数据帧
B. RTA将数据帧通过G0/0/1.1子接口直接转发出去
C. RTA删除VLAN标签20后，由G0/0/1.1接口发送出去
D. RTA先要删除VLAN标签20，然后添加VLAN标签10，再由G0/0/1.1接口发送出去
【单选题】
QUESTION 289 以下关于LACP模式的链路聚合说法正确的是？___
A. LACP模式下不能设置活动端口的数量
B. LACP模式下所有活动接口都参与数据的转发，分担负载流量
C. LACP模式下最多只能有4个活动端口
D. LACP模式下链路两端的设备相互发送LACP报文
【单选题】
QUESTION 290以下关于Hybrid端口说法正确的有？ ___
A. Hybrid端口不需要PVID
B. Hybrid端口只接收带VLAN TAG的数据帧
C. Hybrid端口发送数据帧时，一定携带VLAN TAG
D. Hybrid端口可以在出端口方向将某些VLAN帧的Tag剥掉
【单选题】
QUESTION 291 PPP链路建立过程中由Dead阶段可以直接转化为哪个阶段？ ___
A. Authenticate
B. Terminate
C. Establish
D. Network
【单选题】
QUESTION 292 以太网数据帧的Length/Type字段取以下哪个值时，表示承载的是PPPoE会话阶段的报文？___
A. 0x8863
B. 0x8864
C. 0x0800
D. 0x0806
【单选题】
QUESTION 293 VRP平台上，设置Serial接口数据链路层的封装类型为HDLC的命令是（）。___
A. link-protocol hdlc
B. hdlc enable
C. encapsulation hdlc
D. link-protocol ppp
【单选题】
QUESTION 294 (SNMPv1定义了5种协议操作。___
【单选题】
QUESTION 295 在华为ARG3系列路由器上进行有关AAA认证的配置时，最多能配置多少个域（Domain）？___
【单选题】
QUESTION 296 启用GRE的keepalive功能后，GRE隧道的本端会周期性的每10s向对端发送一次keepalive报文。___
【单选题】
QUESTION 297AAA协议是RADIUS协议。___
【单选题】
QUESTION 299 下面哪个版本的SNMP协议支持加密特性？___
A. SNMPv2c
B. SNMPv3
C. SNMPv2
D. SNMPv1
【单选题】
QUESTION 301 DHCPv6服务器发送的DHCPv6 ADVERTISE报文目的端口号为？___
A. 548
B. 547
C. 549
D. 546
【单选题】
QUESTION 302 当DHCPv6客户端收到DHCPv6服务器发送的RA报文中的和O标记位取值为下列哪个数值时，DHCPv6客户 端采用DHCPv6有状态自动配置获取IPv6地址和其它配置信息？___
【单选题】
QUESTION 303 ::1/128是IPv6环回地址。___
【单选题】
QUESTION 304 如下图所示的网络，在RouterB设备上配置静态路由如下，则在RouterB路由表中，2001::1/128对应的NextHop为？ ipv6 route-static 2001::1 128 3001::12:1 ___
A. 3001::12:2
B. fe80::fe03:c3fb
C. 3002::12:1
D. 3001::12:1
【单选题】
QUESTION 305 SR（Segment Routing）作为一种新的替代MPLS的隧道技术受到越来越多的关注，很多用户希望引入SR技术来简化网络部署和管理，降低CAPEX(Capital Expenditure)。SR作为当前主流的隧道技术，在承载网使用广泛。 ___
【单选题】
QUESTION 306 广播地址是网络地址中主机位全部置为1的一种特殊地址，它也可以做为主机地址使用。 ___
【单选题】
QUESTION 307如图所示，如果管理员希望能够提升此网络的性能，则下面哪一种方法最合适？___
A. 使用交换机把每台主机连接起来，并把每台主机的工作模式修改为全双工
B. 使用Hub把每台主机连接起来，并把每台主机的工作模式都修改为半双工
C. 使用Hub把每台主机连接起来，并把每台主机的工作模式都修改为全双工
D. 使用交换机把每台主机连接起来，并把每台主机的工作模式修改为半双工
推荐试题
【单选题】
Some old people don’t like pop songs because they cannot ___ so much noise.
A. resist
B. sustain
C. tolerate
D. undergo
【单选题】
I have kept that portrait where I can see it every day, as it always ___ me of my university days in London.
A. recollects
B. reminds
C. recalls
D. invokes
【单选题】
The article suggests that when a person is under unusual ___ he should be especially careful to have a well-balanced diet.
A. weight
B. stress
C. press
D. nerve
【单选题】
You should hire a more ___ manager than the one you currently have.
A. sufficient
B. effective
C. respective
D. efficient
【单选题】
Surgeons began to ___ their hands and arms with soap and water before operating.
A. scrub
B. enhance
C. rub
D. exhibit
【单选题】
He might let something ___ in a moment of weakness.
A. slip
B. leak
C. to slip
D. to leak
【单选题】
Do not ___ the salad until you are ready to serve.
A. mix
B. toss
C. fling
D. eat
【单选题】
The ___ for which he had fought all his life no longer seemed important to him.
A. aims
B. objectives
C. subjects
D. goals
【单选题】
You should pause and ___ now.
A. tweet
B. ponder
C. squander
D. gossip
【单选题】
Eating too much fat can ____heart disease and cause high blood pressure.
A. contribute to
B. attribute to
C. attest to
D. devote to
【单选题】
It soon ___ that what she loved was not my person but my wealth.
A. widened
B. expanded
C. extended
D. developed
【单选题】
I want to buy a new tie to ___ this brown suit.
A. go into
B. go after
C. go with
D. go through
【单选题】
Our company decided to ___ the contract because a number of the conditions in it had not been met.
A. destroy
B. resist
C. assume
D. cancel
【单选题】
My first ___ was to turn and run.
A. institute
B. institution
C. instinct
D. tuition
【单选题】
I think it’s time I ___ in a new computer.
A. invested
B. insulted
C. interacted
D. impacted
【单选题】
The jeweler will ____ the inside of the ring with her name.
A. carve
B. engrave
C. cut
D. engross
【单选题】
He was bleeding from a _____ on his forehead.
A. lash
B. gash
C. ash
D. sash
【单选题】
Let us go to the next ______ on the agenda.
A. matter
B. debate
C. speech
D. item
【单选题】
They are _____ moving their office outside London.
A. considered
B. discussing
C. pondering
D. negotiating
【单选题】
Although she _____ the old pot thoroughly, she could not make it look completely clean.
A. scrubbed
B. washed
C. made
D. screwed
【单选题】
The mistake will remain an indelible ____ on his memory.
A. stain
B. thing
C. issue
D. accident
【单选题】
The wheel ____ through my frozen hand, and the car went right across the road.
A. slipped
B. sipped
C. dashed
D. disappeared
【单选题】
The cupboard was ____ with old fishing tackle.
A. stuffed
B. stocked
C. stored
D. filled
【单选题】
The decision depended on the ____ of a coin.
A. loss
B. lot
C. toss
D. sign
【单选题】
Teaching can be a tiring and ____ job.
A. meaningless
B. stressed
C. rewarded
D. stressful
【单选题】
The building is partly a museum and partly a private ____.
A. place
B. area
C. community
D. residence
【单选题】
Stop ______ your foot.
A. tossing
B. wiggling
C. exhibiting
D. reviewing
【单选题】
It was a bloody ___ between the two armies.
A. rebellion
B. encounter
C. meet
D. fight
【单选题】
They conferred on the best way to ______ business.
A. extend
B. adjust
C. expand
D. adopt
【单选题】
We had a party last month, and it was a lot of fun, so let’s have ____ one this month.
A. another
B. the other B. more D. other
【单选题】
I decided to go to the library as soon as I ____.
A. finish what I did
B. finished what I did
C. would finish what I was doing
D. finished what I was doing
【单选题】
The speaker, ______ for her splendid speeches, was warmly received by the audience.
A. having known
B. being known
C. knowing
D. known
【单选题】
No sooner had we reached the top of the hill ______ we all sat down to rest.
A. when
B. then
C. than
D. until
【单选题】
___ energy under the earth must be released in one form or another, for example, an earthquake.
A. Accumulated
B. Gathered
C. Assembled
D. Collected
【单选题】
Please ___ me for my rudeness. I really do not know the custom here.
A. engaged
B. comfort
C. execute
D. forgive
【单选题】
Sometimes it is very difficult to ___ some of the English words. Even the native speaker cannot help.
A. decrease
B. create
C. define
D. delight
【单选题】
In the wife’s eyes, his ___ to their marriage life is far from perfect.
A. requirement
B. commitment
C. participation
D. reflection
【单选题】
This newspaper often ___ the government’s opinion, not the public opinion.
A. affects
B. reacts
C. reflects
D. recognizes
【单选题】
It is predicted that heavy rains are ___ to flood the area in a few days.
A. frightening
B. threatening
C. scattering
D. warning
【单选题】
I chose to work abroad to improve my career ___.
A. future
B. path
C. prospect
D. expect
