多項(xiàng)選擇題Why do large OSPF networks use a hierarchical design?()

A.to confine network instability to single areas of the network.
B.to reduce the complexity of router configuration
C.to speed up convergence
D.to lower costs by replacing routers with distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead


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2.多項(xiàng)選擇題

Host1正在試圖和Host2聯(lián)系。RouterC的e0接口是down的,以下選項(xiàng)正確的是?()


A.RouterC會(huì)使用ICMP通知Host1“Host2無(wú)法到達(dá)”
B.RouterC會(huì)使用ICMP通知Host1“Host1無(wú)法到達(dá)”
C.RouterC會(huì)使用ICMP通知Host1,RouterA和RouterB“Host2無(wú)法到達(dá)”
D.RouterC會(huì)發(fā)送一個(gè)“DestinationUnreachable”的消息類(lèi)型
E.RouterC會(huì)發(fā)送一個(gè)“RouterSelection”的消息類(lèi)型
F.RouterC會(huì)發(fā)送一個(gè)“SourceQuench”的消息類(lèi)型

3.單項(xiàng)選擇題How many subnets can be gained by subnetting 172.17.32.0/23 into a /27 mask, and how many usable host addresses will there be per subnet?()

A.8 subnets, 31 hosts
B.8 subnets, 32 hosts
C.16 subnets, 30 hosts
D.16 subnets, 32 hosts
E.A Class B address can't be subnetted into the fourth octet.

5.單項(xiàng)選擇題

S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology shown in the exhibit. Originally, static routes were configured between these routers to successfully route traffic between the attached networks. What will need to be done in order to use RIPv2 in place of the static routes?()

A.Configure the no ip subnet-zero command on R1, R2, and R3.
B.Dynamic routing protocols such as RIPv2 cannot be used across Frame Relay networks.
C.Configure the S0/0 interface on R1 as two subinterfaces and configure point-to-point links to R2 and R3.
D.Change the 172.16.2.0/25 and 172.16.2.128/25 subnetworks so that at least two bits are borrowed from the last octet.
E.Change the network address configuration to eliminate the discontiguous 172.16.2.0/25 and 172.16.2.128/25 subnetwork.

7.單項(xiàng)選擇題What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-treetopology?()

A.lowest port MAC address
B.port priority number and MAC address.
C.VTP revision number
D.highest port priority number.
E.pathcost

8.單項(xiàng)選擇題A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5.What command should be issued to accomplish this task?()

A.access-list 101 deny tcp192.168.1.1280.0.0.15192.168.1.50.0.0.0eq23 access-list 101 permit ip any any
B.access-list 101 deny tcp192.168.1.1280.0.0.240192.168.1.50.0.0.0eq23 access-list101permit ip any any
C.access-list 1 deny tcp192.168.1.1280.0.0.255192.168.1.50.0.0.0eq21 access-list1permit ip any any
D.access-list 1 deny tcp192.168.1.1280.0.0.15host192.168.1.5eq23 access-list1permit ip any any

9.單項(xiàng)選擇題

一個(gè)網(wǎng)絡(luò)管理員配置了兩臺(tái)交換機(jī)London和Madrid,讓它們使用VTP。但是,兩臺(tái)交換機(jī)之間沒(méi)有共享VTP信息,根據(jù)下圖,回答交換機(jī)之間沒(méi)有分享VTP信息的原因是()。

A.VTP版本配置錯(cuò)誤
B.VTP工作模式配置錯(cuò)誤
C.VTP域名配置錯(cuò)誤
D.VTP的pruning mode被禁止了
E.VTP的V2 mode被禁止了
F.VTPtraps generation被禁止了

10.單項(xiàng)選擇題Assuming default setting,how can you erase the VTP database of VLANs on a CISCO IOS switch running in VTP server mode?()

A.Enable VTP pruning
B.From privileged mode,erase the startup configuration file,then reload.
C.From privileged mode,erase the vlan date file,then reload.
D.Cycle the switch power.

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