Which of the following are characteristics of OSPF areas?()A. Hierarchical OSPF networks need to be in one areaB. Multiple OSPF areas must connect to area 0C. Single area OSPF networks must be configured in area 1D. Areas can be assigned any number from 0

第1题：

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 LSAs in their database.
• C、All OSPF routers in totally stubby areas can have type 3 LSAs in  their database.
• D、All OSPF routers in totally stubby areas can have type 7 LSAs in their database.
• E、All OSPF routers in NSSA areas can have type 3 LSAs in their database.
• F、All OSPF routers in NSSA areas can have type 7 LSAs in their database.

第2题：

Which of the following data structures exist on a router for the OSPF routing protocol？（）

• A、OSPF topology table
• B、OSPF interface table
• C、OSPF routing information base
• D、OSPF link-state database
• E、OSPF adjacency table
• F、OSPF neighbor table

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 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5题：

Which of the following are characteristics of OSPF areas?（）

• A、Hierarchical OSPF networks need to be in one area
• 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 characteristics apply to IS - IS but not to OSPF?（）

• A、uses a default IOS metric of 10 on each interface
• B、uses an on - demand circuit to reduce the hello and LSA flooding across switched WAN li nks,such as ISDN
• C、uses a DIS and a backup DIS to present the psuedo - node on the LAN
• D、encapsulates PDUs directly into a data - link frame
• E、uses stubby areas to improve network scalability
• F、runs PRC (Partial Route Calculations) to calculate IP re achability information

第7题：

Which of the following can either directly or indirec tly identify all the interfaces for which both 1) OSPF has been enabled and 2) OSPF is not passive?（）

• A、show ip ospf database
• B、show ip ospf interface brief
• C、show ip protocols
• D、show ip route ospf
• E、show ip ospf neighbors

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第13题：

When implementing OSPFv3, which statement describes the configuration of OSPF areas?（）

• A、In interface configuration mode, the OSPFv3 area ID combination assigns interfaces to OSPFv3 areas.
• B、In router configuration mode, the network wildcard area ID combination assigns networks to OSPFv3 areas.
• C、In interface configuration mode, the IPv6 OSPF process area ID combination assigns interfaces to OSPFv3 areas.
• D、In router configuration mode, the IPv6 OSPF interface area ID combination assigns interfaces to OSPFv3 areas.

第14题：

One of the most important characteristics of OSPF is Multiple areas. Which statement best describes why this feature is such an important enhancement to earlier routing protocols?（）

• A、The network domain, when divided into areas, allows for the use of both IANA classful addressing and private addressing.
• B、The use of multiple areas allows for the use of prioritization.
• C、All computation is kept within the area, with minimum communication between the areas,allowing the network to scale to  larger sizes.
• D、It is easier to implement security.

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：

Which statement describes the process ID that is used to run OSPF on a router ?（）

• A、It is locally significant and must be the same throughout an area
• B、It is globally significant and is used to represent the AS number
• C、It is locally significant and is used to identify an instance of the OSPF database
• D、It is globally significant and is used to identify OSPF stub areas

第17题：

Area Border Router （ABR） is a router located on the border of one or more OSPF areas that connect those areas to the backbone network. An ABR will inject a default route into which two types of areas？（）

• A、Area 0
• B、NSSA
• C、Totally stubby
• D、Stub

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

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