When verifying the OSPF link state database, which type of LSAs should you expect to see within the different OS PF area types?（）A、All OSPF routers in stubby areas can have type 3 LSAs in their database.B、All OSPF routers in stubby areas can have type 7 L

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第2题：

When an OSPF design is planned, which implementation can help a router not have memory resource issues?（）

• A、Have a backbone area (area 0) with 40 routers and use default routes to reach external destinations
• B、Have a backbo ne area (area 0) with 4 routers and 30,000 external routes injected into OSPF
• C、Have less OSPF areas to reduce the need for interarea route summarizations
• D、Have multiple OSPF processes on each OSPF router. Example, router ospf 1, router ospf 2

第3题：

OSPF stub areas are an important tool for the Network designer； which of the following two shouldbe considered when utilizing OSPF stub areas？ （）

• A、 OSPF stub areas increase the size of the LSDB with the addition of Type 3 and 5 LSAs
• B、 OSPF not so stubby areas are particularly useful as a simpler form of summarization
• C、 OSPF stub areas are always insulated from external changes
• D、 OSPF totally stubby cannot distinguish among ABRs for the best route to destinationsoutsidethe areas
• E、 OSPF stub areas can distinguish among ASBRs for destinations that are external to the OSPFdomain

第4题：

Which of the following is true about routers internal to a totally NSSA area?（）

• A、Routers cannot redistribute external routes into the area.
• B、Routers should have zero Type 3 LSAs in their LSDBs.
• C、Routers should have zero Type 5 LSAs in their LSDBs.
• D、Routers should learn default routes from the ABRs attached to the area.

第5题：

Which statement best describes OSPF external LSAs （type 5）？（）

• A、OSPF external LSAs are automatically flooded into all OSPF areas， unlike type 7 LSAs， which require that redistribution be configured.
• B、External LSAs （type 5） are automatically changed to type 1 LSAs at ASBRs.
• C、Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.
• D、External network LSAs （type 5） redistributed from other routing protocols into OSPF are not permitted to flood into a stub area.

第6题：

You are developing a verification plan for an upcoming OSPF implementation. Part of this plan is to verify the status of type 3 LSAs within the network. Which routers should you verify first to ensure that the configuration s are correct for generating type 3 LSAs?（）

• A、Internal routers within the backbone area (area 0)
• B、Internal routers within the NSSAs
• C、Internal routers within the stubby areas
• D、ASBRs
• E、ABRs
• F、DRs and BDRs

第7题：

Which three statements about OSPF partial SPF are true？（）

• A、If it is triggered by Type 4， all Type 4 LSAs that announce a certain ASBR and all Type 5 and 7 LSAs are processed
• B、If it is triggered by Types 5 and 7， all Type 5 and 7 LSAs that contribute to a certain destination are processed.
• C、If it is triggered by Type 2， all Type 2 LSAs that contribute to a certain destination are processed.
• D、If it is triggered by the change of Type 3， 4， 5， and 7 LSAs.
• E、If it is triggered by the change of Type 2， 3， 5， and 7 LSAs

第8题：

Which router translates the Type 7 LSAs into Type 5 LSAs, according to RFC 1587 (OSPF NSSAOption) in an OSPF NSSA with more than one ABR?（）

• A、The router receiving the route translates the Type 7 LSA into a Type 5 LSA.
• B、The ABR with the lowest router ID translates all Type 7 LSAs into Type 5 LSAs.
• C、The ABR with the highest router ID translates all Type 7 LSAs into Type 5 LSAs.
• D、All ABRs translate the Type 7 LSAs into Type 5 LSAs depending on which one has the lowest cost to the route.

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第13题：

You are troubleshooting an OSPF problem where external routes are not showing up in the OSPF database. Which two options a re valid checks that should be performed first to verify proper OSPF operation?（）

• A、Are the ASBRs trying to redistribute the external routes into a totally stubby area?
• B、Are the ABRs configured with stubby areas?
• C、Is the subnets keyword being used with the redistribution command?
• D、Is backbone area (area 0) contiguous?
• E、Is the CPU utilization of the routers high?

第14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15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16题：

An OSPF non-backbone area follows external routes to be flooded within the area. These external routes are propagated into other areas. However， external routes from other areas are not allowed to enter this area. Which type of OSPF area does this describe？（）

• A、stub area
• B、transit area
• C、border area
• D、not-so-stubby area

第17题：

what type of route can be advertised to OSPF totally stubby area？

第18题：

The maximum number of routers per OSPF area typically depends on which three factors?（）

• A、the kind of OSPF areas being implemented
• B、the number of external LSAs in the network
• C、the number of DRs and BDRs in the areas
• D、the number of virtual links in the areas
• E、how well the areas can be summarized
• F、the use of LSA filters

第19题：

An OSPF non-backbone area allows external routes to be flooded within the area. These externalroutes are propagated into other areas. However, external routes from other areas are not allowed to enter this area. Which type of OSPF area does this describe?（）

• A、stub area
• B、transit area
• C、border area
• D、not-so-stubby area

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