Cisco BSCI Building Scalable Cisco Internetworks Set 2

1.

Which option is true regarding the synchronization rule?

Do not use or internally advertise a route until the route is learned from a source other than BGP. Do not use or advertise a route until the route is learned from a BGP peer. Do not use or advertise routes marked PARTIAL. Wait until a CONFIRM message is received before using routes from BGP neighbors.

2.

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?

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

3.

When learning a new route, if a LSA received is not found in the topological database, what will an internal OSPF router do?

The sequence numbers are checked, and if the LSA is valid it is entered into the topology database. The LSA is placed in the topological database and an acknowledgement is sent to the transmitting router. The LSA is dropped and a message is sent to the transmitting router. The LSA is flooded immediately out of all the OSPF interfaces, except the interface from which the LSA wasreceived.

4.

EIGRP has been configured to operate over Frame Relay multipoint connections. What should the bandwidth command be set to?

the CIR rate of the lowest speed connection multiplied by the number of circuits the CIR rate of the lowest speed connection the CIR rate of the highest speed connection the sum of all the CIRs divided by the number of connections

5.

Which statement is correct based upon the following output from the show command on PG-RT1?

OSPFv3 establishes neighbor adjacencies by using Link-local addresses. OSPFv3 establishes neighbor adjacencies by using IPv4 addresses. OSPFv3 establishes neighbor adjacencies by using global IPv6 addresses. PG-RT1 owns a subnet mask of 64 bits.

6.

After DUAL calculations, a router has identified a successor route, but no routes have qualified as a feasible successor. In the event that the current successor goes down, what process will EIGRP use in the selection of a new successor?

EIGRP will find the interface with the lowest MAC address The route will transition to the active state The route will transition to the passive state EIGRP will automatically use the route with the lowest feasible distance(FD) EIGRP will automatically use the route with the lowest advertised distance(AD)

7.

EIGRP has been configured to operate over Frame Relay multipoint connections. What should the bandwidth command be set to?

the CIR rate of the lowest speed connection multiplied by the number of circuits the CIR rate of the lowest speed connection the CIR rate of the highest speed connection the sum of all the CIRs divided by the number of connections

8.

What does the default value of the EIGRP variance command of 1 mean?

Load balancing is disabled on this router. The router performs equal-cost load balancing. Only the path that is the feasible successor should be used. The router only performs equal-cost load balancing on all paths that have a metric greater than 1.

9.

What technique should be used on BGP edge routers to prevent a multi-homed autonomous system from becoming a transit system?

Advertise with a high MED value all networks that are discovered via external BGP. Remove the AS-Path information on all routes in the BGP table prior to advertising externally. Only advertise networks externally if they have been discovered via internal BGP. Use an outgoing distribution list to filter all networks not originating from inside the autonomous system. Set the no-export community attribute on all networks that are advertised externally.

10.

Which routing protocol will continue to receive and process routing updates from neighbors after the passive- interface router configuration command is entered?

EIGRP RIP OSPF IS-IS

Cisco BSCI Building Scalable Cisco Internetworks Set 2

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