What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?()A.10B.40C.30D.20

第1题：

第2题：

Which three are benefits of IS - IS over OSPF?（）

• A、supports route tags
• B、supports more routers in an area
• C、does not require Hello packets to establish neighbor relationships
• D、produces fewer link state advertisements for a given network
• E、supports network layer protocols other than IP
• F、requires fewer neighbor relationships in a broadcast multiaccess network

正确答案:B,D,E

第3题：

A router learns about a remote network from EIGRP, OSPF, and a static route. Assuming all routing protocols are using their default administrative distance, which route will the router use to forward data to the remote network（）。

• A、The router will use the static route.
• B、The router will use the OSPF route.
• C、The router will use the EIGRP route.
• D、The router will load balance and use all three routes.

正确答案:A

第4题：

Which of the following characteristics are true assuming you are troubleshooting a networkcurrently enabled for VRRP？（Choose all that apply.）（）

• A、The network is load balancing among different members of the VRRP group
• B、The default hello timers are 1 second
• C、The interface IP address is being used as the virtual IP address
• D、There are several routers in the group simultaneously forwarding traffic for the group
• E、It is a Cisco Proprietary protocol
• F、The default hello timers are 3 seconds

正确答案:B,C

第5题：

What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multi-access network?（）

• A、10
• B、40
• C、30
• D、20

正确答案:A

第6题：

What is the function of the helper router during a restart event in OSPF?（）

• A、Sends Rapid Hellos to the restarting router.
• B、Maintains Adjancency with restarting router.
• C、Sends periodic DD packets to the restarting router.
• D、Floods Type 9 LSAs to all routers indicating a restarting event.

正确答案:B

第7题：

What is the default maximum number of equal-cost paths that can be placed into the routing of a cisco OSPF router?（）

• A、16
• B、2
• C、unlimited
• D、4

正确答案:D

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第14题：

What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?（）

• A、10
• B、40
• C、30
• D、20

正确答案:A

第15题：

In a point-to point network, which address are OSPF hello packets sent to?（）

• A、127.0.0.1
• B、192.168.0.5
• C、223.0.0.1
• D、172.16.0.1
• E、224.0.0.5
• F、254.255.255.255.255

正确答案:E

第16题：

On which types of network will OSPF elect a backup designated router?（）

• A、point-to-point and multiaccess
• B、point-to-multipoint and multiaccess
• C、point-to-point and point-to-multipoint
• D、nonbroadcast and broadcast multipoint
• E、nonbroadcast and broadcast multiaccess

正确答案:E

第17题：

Which statement about OSPF authentication is true？（）

• A、To enable OSPF authentication in a network， OSPF area 0 authentications must be enabled first
• B、The payload of OSPF version 3 packets contains no authentication information
• C、OSPF version 3 supports Advanced Encryption Standard
• D、OSPF version 3 uses router ID as a key to encrypt OSPF hello packets
• E、OSPF MD5 authentication uses TCP， and Plan Test authentication uses UDP

正确答案:B

第18题：

What is the purpose of the OSPF router ID in a OR/BOR election?（）

• A、It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network
• B、It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router
• C、It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network
• D、It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

正确答案:C

第19题：

What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）

• A、It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.
• B、It sends a copy of its neighbor table to all adjacent routers.
• C、It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.
• D、It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.

正确答案:C

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