Nokia 4A0-C04 問題練習

Question No : 1
Which of the following statements regarding area border routers in an OSPF network is true?

• A.The term backbone router has the same definition as the term area border router.
• B.An OSPF network needs at least one area border router to function.
• C.Area border routers connect the backbone area to other areas in an OSPF network.
• D.By definition, an area border router must perform route summarization between areas.

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Question No : 2
There is an IP host with IP address 10.2.3.1. A static route is created, using the "configure router static-route 10.2.3.0/24 next-hop 10.1.2.1" command .
What is the correct traceroute command to test this static route on an Nokia 7750 SR?

• A.traceroute 10.2.3.1
• B.traceroute 10.2.3.1 next-hop 10.1.2.1
• C.traceroute next-hop 10.1.2.1
• D.traceroute does not work on the Nokia 7750 S
• E.traceroute 10.1.2.1

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Question No : 3
In an OSPF environment, what must a router receive after it sends out an update?

• A.The router must receive an acknowledgment
• B.The router must receive a Hello
• C.The router must receive a new sequence number
• D.The router must receive a Link State Packet

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Question No : 4
In which of the following types of areas does an OSPF router not set the E bit in its Type 1 LSA?

• A.Not so stubby area
• B.Stub area
• C.Backbone area
• D.Normal area

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Question No : 5
What is the purpose of a T-LDP session?

• A.It allows link LDP to be configured on the edge devices only.
• B.It is used to signal the transport labels in the provider core.
• C.It allows selective control over which devices are configured for LD
• D.It is used to signal the service labels in the provider core.

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Question No : 6
Which of the following is TRUE when the explicit null is implemented?

• A.The penultimate router will forward packets to the eLER, based on the IP header.
• B.The eLER will receive packets with a top label value of 0.
• C.The eLER will receive packets with a top label value of 3.
• D.The penultimate router will pop the top label from the packets.

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Question No : 7
How is the aggregator attribute handled with 32-bit AS numbers?

• A.With the same method and attribute as 16-bit AS numbers.
• B.With the same method as 16-bit AS numbers, but using the AS4_Aggregator attribute.
• C.Aggregation is not yet supported with 32-bit AS numbers.
• D.By using a dummy value of 23456 in the 16-bit AS aggregator field. This value lets the router know it needs to read the 32-bit AS number that is contained in the nextTL

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Question No : 8
Click on the exhibit.



Two LSPs traverse the path R1-R2-R3. Both LSPs are configured with facility fast reroute and link protection.
When router R1 is the PLR, which router becomes the Merge Point (MP) for this LSP?

• A.Router R1
• B.Router R2
• C.Router R3
• D.Router R4
• E.Router R5

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Question No : 9
Which of the following regarding the location of an MPLS label is FALSE?

• A.The MPLS label value may be carried in an ATM header.
• B.The MPLS label value may be carried in a shim header.
• C.The MPLS label value may be carried in an OSPF header.
• D.The MPLS label value may be carried in a Frame Relay header.

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Question No : 10
What is the purpose of configuring a triggered-policy on an Nokia 7750 SR?

• A.Policy changes are delayed until the peer router with the affected routes reboots.
• B.Policy changes are delayed until route updates for affected BGP routes are received from peers.
• C.Policy changes are delayed until BGP sessions are cleared or BGP is reset.
• D.Policy changes are delayed until the router reboots.

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Question No : 11
What type of LSA is used to flood information about prefixes from one OSPF area to other attached areas?

• A.Type 1
• B.Type 3
• C.Type 4
• D.Type 7

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Question No : 12
An autonomous system has 7 routers configured with BGP .
How many iBGP sessions are required for a fully meshed configuration?

• A.7
• B.13
• C.21
• D.42

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Question No : 13
Click on the exhibit.



When router R1 forwards a PATH message to router R2, which of the following about the PATH message's IP header is TRUE?

• A.The options field is set to router alert.
• B.The source address is R1's egress interface address.
• C.The destination address is R2's ingress interface address.
• D.The HOP object includes R2's system address.

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Question No : 14
Which of the following is a characteristic of a VPLS?

• A.All SAPs of a VPLS belong to the same broadcast domain.
• B.When a new site is added, all the existing sites need to be shutdown and re-provisioned.
• C.An additional T-LDP session is required between PEs for each additional VPLS that is provisioned.
• D.Multiple VPLSes on the same router share a single MAC FD

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Question No : 15
Which of the following regarding route reflectors is TRUE?

• A.Only the route reflector is configured with a cluster id.
• B.There can only be one route reflector in a cluster.
• C.Clients should have iBGP sessions with each other to maintain the mesh.
• D.There can only be one level of route reflectors in the topology.

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