IS － IS is often considered an alternative to OSPF in the IP world. Which two statements identify similarities between IS －IS and OSPF?()A. support for designated intermediate systems and backup designated intermediate systemsB. support for multip le area

第1题：

第2题：

第3题：

From a design perspective which two of the following OHPF Statements are most relevant？（）

• A、 OSPF stub areas can be thought of as a simple form of summarization
• B、 OSPF cannot filter intra area routes
• C、 An ARR ran only exist in two areas - the backbone and one adjacent area
• D、 Performance issues in the Backbone area can be offset by allowing some traffic to transit anon-backbone area
• E、 the size of an area （the LSDB） will be constrained by the size of the IP MTU

第4题：

Which of the following describe the process identifier that is used to run OSPF on a router (Choose two.)（）。

• A、It is locally significant
• B、It is globally significant
• C、It is needed to identify a unique instance of an OSPF database
• D、It is an optional parameter required only if multiple OSPF processes are running on the router
• E、All routers in the same OSPF area must have the same process ID if they are to exchange routing information

第5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6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7题：

What are two Cisco IOS commands that can be used to view neighbor adjacencies?（）

• A、show ip ospf interfaces
• B、show ip ospf protocols
• C、show ip ospf neighbors
• D、show ip ospf database

第8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

第9题：

第10题：

第11题：

第12题：

第13题：

第14题：

If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）

• A、A sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor link
• B、A sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchanged
• C、A SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor door
• D、A SHAM link is part of OSPF network of MPLS-VPN provider

第15题：

When the Cisco IOS OSPF command ip ospf dead-interval minimal hello-multiplier 5 is configured， which two statements are true？ （）

• A、OSPF hello interval is 5 seconds
• B、OSPF hello interval is 1 second
• C、OSPF dead interval is 1 second
• D、OSPF dead interval is 5 seconds
• E、OSPF dead interval is 20 seconds
• F、OSPF hello interval is 0.2 second

第16题：

IS - IS is often considered an alternative to OSPF in the IP world. Which two statements identify similarities between IS -IS and OSPF?（）

• A、support for designated intermediate systems and backup designated intermediate systems
• B、support for multip le areas per router
• C、support for classless routing
• D、support for address summarization between areas
• E、support for both DIS adjacencies and neighbor adjacencies

第17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18题：

Which two items should you know when configuring OSPF to dynamically learn routes? （）(Choose two.)

• A、OSPF area ID
• B、OSPF neighbor address
• C、OSPF loopback address
• D、OSPF authentication type

第19题：

Which command is used to display the collection of OSPF link states？（）

• A、show ip ospf lsa database（not A）
• B、show ip ospf link-state
• C、show ip ospf neighbors
• D、show ip ospf database

第20题：

Which two statements are correct regarding the default protocol preference values? （）

• A、RIP is preferred over OSPF external routes
• B、Direct, local and static routes have the same preference value
• C、OSPF's preference value is lower than BGP
• D、OSPF has a single preference value for both internal and external routes

第21题：

第22题：

第23题：