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How do routers in an IS-IS Level-1 domain exit to reach othe

题目
多选题
How do routers in an IS-IS Level-1 domain exit to reach other Level-1 （L1） domains？（）
A

Level-1（L1） routers use default routes announced by Level-2（L2） routers in Level-1（L1） domain

B

Level-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） router

C

Level-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOS

D

Level-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS

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相似问题和答案

第1题：

Within IS－IS, the restart helper performs which task?()

A. It sends CSNPs to the restarting router.

B. It periodically sends TLV 211 to the restarting router.

C. It informs other routers in the domain that a router has restarted.

D. It tears down adjacency and sends its entire database after 30 seconds.


参考答案：A

第2题：

Which two conditions, when met, allow an IS－IS Level 2 router to be considered attached?()

A. You can reach other Level 2 routers.

B. It can reach at least one other defined area.

C. The router is reachable by at least two ES-IS nodes.

D. It has at least one enabled reachable prefix with a valid metric defined.


参考答案：B, D

第3题：

Thetelesalesforcerequestedadditionalwaystoterminatetheautomatedpollingquestionnaire.Inadditiontothedefaultfunctionality,youprovideamenuitemandabuttonforthispurpose.Adheringtoefficientcodingpractices,whichPL/SQLcodedoyouuseforthemenuitemandthebutton?（）

A.EXIT

B.EXIT_FORM

C.DO_KEY(‘Key-Exit‘)

D.DO_KEY(‘EXIT_FORM‘)


参考答案：D

第4题：

When an EFL teacher asks his student "How do you know that the author liked the placesince he did not tell us explicitly", he/she is helping students to reach _________ comprehension.


A.literal

B.evaluative

C.inferential

D.appreciative

答案：C
解析：
考查阅读教学。题干的意思是外语教师问学生“作者没有明确告诉我们，如何判断出他喜欢这个地方”，老师是在帮助学生进行什么阅读。A项“字面阅读”，B项“评价性阅读”，C项“推断性阅读”．D项“欣赏性阅读”，故选C。

第5题：

How often are IS－IS Hello packets transmitted?()

A. 3 seconds for DIS; 9 seconds for non-DIS

B. 9 seconds for DIS; 3 seconds for non-DIS

C. 10 seconds for DIS; 3 seconds for non-DIS

D. 10 seconds for all routers


参考答案：A

第6题：

Routers A and B are connected with a point-to-point OC-3 interface. Each router‘s OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in the same area.How many IS-IS adjacencies exist between the two routers?（）

A.0

B.1

C.2

D.3


参考答案：C

第7题：

Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）

A.0

B.1

C.2

D.3


参考答案：B

第8题：

下列哪条语句是错的______。

A．exit sub

B．exit function

C．exit while

D．exit do


正确答案：C
解析：exit sub用来跳出本过程。
exit function用来跳出本函数并返回到调用处继续执行。
exit do用来退出do循环。
没有exit while这个用法。

第9题：

When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?()

A. PIM - DM

B. PIM - SM

C. PIM - RP

D. CGMP

E. IGMP snooping


参考答案：B

第10题：

How do routers in an IS-IS Level-1 domain exit to reach other Level-1 （L1） domains？（）

  • A、Level-1（L1） routers use default routes announced by Level-2（L2） routers in Level-1（L1） domain
  • B、Level-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） router
  • C、Level-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOS
  • D、Level-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS

正确答案:B,C

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