Cisco CCIE Service Provider Cable Recertification Set 2

1.

Based on the information above, which OSPF configurations listed are valid? (multiple answer)

routerArouter ospf 1network 14.0.0.0 0.255.255.255 area 0routerBrouter ospf 1network 14.0.0.0 0.255.255.255 area 0 routerArouter ospf 1network 14.1.1.0 0.0.0.255 area 0routerBrouter ospf 2network 14.1.1.0 0.0.0.255 area 0 routerArouter ospf 1network 14.0.0.0 0.0.255.255 area 0routerBrouter ospf 1network 14.1.0.0 0.0.0.255area 0 routerArouter ospf 1network 14.1.1.0 0.0.0.255 area 1routerBrouter ospf 1network 14.1.0.0 0.0.255.255area 0

2.

How should OSPF be configured on Router B?

router ospfnetwork 108.3.0.0 router ospf 1network 108.3.100.0 0.0.0.255 area 6network 108.3.2.0 0.0.0.255 area 6 router ospf 1network 108.3.100.0 0.0.0.255 area 6network 108.3.2.0 0.0.0.255 area 0 router ospf 1network 108.3.100.0 255.255.255.0 area 6network 108.3.2.0 255.255.255.0 area 6 router ospf 1network 108.3.1.0 0.0.0.255 area 6network 108.3.100.0 0.0.0.255 area 6network 108.3.2.00.0.0.255 area 6

3.

A router is set up to redistribute routing updates from OSPF to RIP. What answer best describes issues the network administrator needs to be aware of?

Split Horizon, Poison Reverse, Holddown Slow convergence, limited hop-count metric, lack of network mask information, periodic broadcasts None, OSPF is a link-state routing protocol which overcomes issues found in RIP. Difference in metrics (e.g. hops vs. cost), subnet mask allocation/addressing (e.g. VLSM vs. fixed subnetmask length), routing protocol summarization (e.g. network boundaries)

4.

A router has the above routes listed in its routing table and receives a packet destined for 172.16.0.45. What will happen?

The router will not forward this packet, since it is destined for the 0 subnet. The router will forward the packet through 172.31.116.65, since it has the lowest metric. The router will forward the packet through 10.1.1.1. The router will forward the packet through 172.31.116.65, since it has the lowest administrative distance. The router will forward the packet through 192.168.1.4.

5.

According to the diagram, what attribute is initiated by AS200 (IBGP) to give preference to the path A or D traffic will take when going from AS200 to AS100? What attribute is initiated by AS200 (EBGP) to give preference to the path B or C traffic will take when going from AS100 to AS200?

MED; Origin MED; Local Preference Community; Origin Local Preference; MED Origin; Community

6.

Customers green and blue must communicate with each other. Which condition is required?

Customer Blue and Customer Green must use BGP for routing to the Internet. Customer Blue and Customer Green must use unique addresses in their corporate networks. All Service Provider routers must use BGP. The Service Provider must provide BGP Peering to another Service Provider.

7.

BGP can implement a policy of 'Route Dampening' to control route instability. What statement about route dampening is NOT correct?

A numeric penalty is applied to a route each time it flaps. The penalty is exponentially decayed according to parameters, such as half-life-time. The history of unstable routes is forwarded back to the sender to control future updates. The route is eventually suppressed based on a configurable 'suppress limit'.

8.

In BGP, why should a Route Reflector be used?

To overcome issues of split-horizon within BGP To reduce the number of External BGP peers by allowing updates to reflect without the need to be fullymeshed To allow the router to reflect updates from one Internal BGP speaker to another without the need to be fullymeshed To divide Autonomous Systems into mini-Autonomous Systems, allowing the reduction in the number ofpeers None of the above

9.

If a host sends a TCP segment with the RST flag set, it means:

The receiver should send all data in the reassembly buffer to the application receiving it immediately. The receiver should reset the session. Any routers between the source and destination hosts should reset the state of the connection in theirbuffers. The receiver should make certain its send buffer is pushed onto the wire.

10.

The "show controllers cable x/y upstreram x" command does not detect impulse noise because:

It does measure impulse noise but it is an estimate. Ingress is measured in microseconds and can't be detected. Ingress is measured in milliseconds and can't be detected. Impulse is measured in microseconds and can't be detected. Impulse noise is detected but based on an average.

Cisco CCIE Service Provider Cable Recertification Set 2

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Cisco CCIE Service Provider Cable Recertification Set 2

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