By default, an L1/L2 IS-IS route

题目

By default, an L1/L2 IS-IS router advertises what remote area routes into a Level 1 area?()

  • A、only summarized routes
  • B、all routes in the network
  • C、all routes in the backbone
  • D、No routes are advertised.
参考答案和解析
正确答案:D
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相似问题和答案

第1题:

What is the purpose of IS-IS level boundaries?()

A. Restrain the formation of adjacencies.

B. Control the flooding scope of link-state PDUs.

C. Partition the L2 backbone into multiple domains.

D. Aggregate L1 domains into a contiguous backbone.


参考答案:B

第2题:

Assuming both paths shown in the exhibit are available, which statement is correct?()

A. Traffic matching the default route will use 10.1.1.1 as the next hop.

B. Traffic matching the default route will use 10.1.1.254 as the next hop.

C. Traffic matching the default route will be load-balanced per packet across both next hops.

D. Traffic matching the default route will be load-balanced per flow across both next hops.


参考答案:B

第3题:

You need to configure a default route on a Ezonexam router. Which command will configure a default route on a router?

A.VE1(config)# ip route 0.0.0.0 10.1.1.0 10.1.1.1

B.VE1(config)# ip default-route 10.1.1.0

C.VE1(config)# ip default-gateway 10.1.1.0

D.VE1(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1


正确答案:D
解析:Explanation:Thecommand"IProute0.0.0.00.0.0.0<ip-addressoftheinterface>"commandisusedtoconfigureadefaultrouteonarouter.Inthiscase,adefaultroutewithanexthopIPaddressof10.1.1.1wasconfigured.IncorrectAnswers:A.Thiswillbeaninvalidroute,sincethe"10.1.1.0"valuewillspecifythenetworkmask,whichinthiscaseisinvalid.B,C.Thesecommandsareinvalid.Thecommand"ipdefault-network"couldbeused,butnot"ipdefault-route"or"ipdefault-gateway".IPdefault-gatewayisusedonswitches,notrouters.

第4题:

为了设计上的便利,对于四边均有支承的板按弹性方法设计时,当()时按单向板设计。

  • A、l2/l1≥2
  • B、l2/l1<2
  • C、l2/l1≥3
  • D、l2/l1<3

正确答案:C

第5题:

如图所示,线圈L的自感系数很大,且其直流电阻可以忽略不计,L1、L2是两个完全相同的小灯泡,开关S闭合和断开的过程中,灯L1、L2的亮度变化情况是(灯丝不会断)( )。
A.S闭合,L1亮度不变,L2亮度逐渐变亮,最后两灯一样亮;S断开,L2立即熄灭,L1逐渐变暗
B.S闭合,L1亮度不变,L2很亮;S断开,L1、L2立即熄灭
C.S闭合,L1、L2同时亮,而后L1逐渐熄灭,L2亮度不变;S断开,L2立即熄灭,L1亮一下再熄灭
D.S闭合,L1、L2同时亮,而后L1逐渐熄灭,L2则逐渐变得更亮;S断开,L2立即熄灭,L1亮一下再熄灭



答案:D
解析:
当S接通时,L的自感系数很大,对电流的阻碍作用较大,L1和L2串接后与电源相连,L1和L2同时亮,随着L中电流的增大,L的直流电阻不计,L的分流作用增大,L1的电流逐渐减小为零,由于总电阻变小,总电流变大,L2的电流增大,L2灯变得更亮。当S断开,L2中无电流,立即熄灭,而电感L将要维持本身的电流不变,L与L1组成闭合电路,L1灯要亮一下后再熄灭。综上所述,选项D正确。

第6题:

By default, an L1/L2 IS-IS router advertises what remote area routes into a Level 1 area?()

A. only summarized routes

B. all routes in the network

C. all routes in the backbone

D. No routes are advertised.


参考答案:D

第7题:

Which two provide intra -area routing services?()

A. L1 ES

B. L2 IS

C. L2 ES

D. L1 IS

E. L1/L2 IS


参考答案:D, E

第8题:

关于IS-IS的骨干区域,以下说法正确的有()

A.是由所有的L2路由器(含L1/L2)组成的

B.可以不连续

C.用于区域间路由

D.用区域area0标识


正确答案:AC

第9题:

Which source of routing information is preferred by default?()

  • A、OSPF internal
  • B、OSPF external
  • C、IS-IS Level 1
  • D、IS-IS Level 2

正确答案:A

第10题:

IS-IS路由协议中L1和L2的边界处于路由器内部


正确答案:错误

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