Which three statements about OSPF areas are true?（）

第1题：

第2题：

Which two statements are true about IS -IS routing?（）

• A、Based on the default timers, OSPF d etects a failure faster than IS - IS does.
• B、OSPF default timers permit more tuning than IS - IS does.
• C、IS - IS is more efficient than OSPF in the use of CPU resources.
• D、OSPF is more scalable than IS - IS because of its ability to identify normal, stub, an d NSSA areas.
• E、IS - IS and OSPF are both Open Standard, link - state routing protocols which support VLSM.

第3题：

第4题：

Which three statements about Label-Switched Paths （LSPs） are true？ （）

• A、 LSPs are bidirectional.
• B、 LSPs are unidirectional.
• C、 LSPs can be signaled by CAC.
• D、 LSPs can be configured explicitly.
• E、 LSPs can be configured dynamically.

第5题：

Which of the following are true statements regarding the characteristics of OSPF areas? Select all that apply.（）

• A、All OSPF networks require the use of multiple areas
• B、Multiple OSPF areas must connect to area 0
• C、Single area OSPF networks must be configured in area 1
• D、Areas can be assigned any number from 0 to 63535
• E、Area 0 is called the backbone area
• F、Each OSPF area need to be configured with a loopback interface

第6题：

Which three statements about OSPF areas are true?（）

• A、Areas introduce a boundary on the link - state updates.
• B、Areas are  logical definitions specific to any given router.
• C、All routers within an area have the exact link - state database.
• D、The calculation of the Dijkstra algorithm on a router is limited to changes within an area.
• E、The area designated router will always  have a priority of 0.

第7题：

Which one of these statements is true of OSPF type 5 LSAs？ （）

• A、 They are used to summarize area routes to other areas.
• B、 They are used in not-so-stubby areas to propagate external routes.
• C、 They are used to notify areas of the ASBR.
• D、 They are flooded to all areas except stub areas （external route）.

第8题：

第9题：

Which two statements about route redistribution when implementing OSPF are true?（）

• A、Routes learned using any IP routing protocol can only be redistributed into non IP routing protocols.
• B、OSPF can import routes learned using EIGRP, RIP, and IS - IS.
• C、OSPF routes cannot be exported into EIGRP, RIP, an d IS - IS.
• D、At the interdomain level, OSPF cannot import routes learned using BGP.
• E、OSPF routes can be exported into BGP.

第10题：

Which three statements are true about terms in a policy?（）

• A、The order of the terms in a policy is irrelevant
• B、The action is specified in a then statement
• C、Ters are optional in a policy
• D、The match condition can be identified with a from statement
• E、Every policy must contain at least one term