多項選擇題

Refer to the exhibit. From the MAC addresses shown in the command output， to which two ports is the multicast stream 225.230.57.199 being forwarded on this switch？ （）

A.Fa6/28
B.Fa7/20
C.Gi3/7
D.Fa4/2
E.Fa4/14
F.Fa4/38


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1.單項選擇題Which statement best describes OSPF external LSAs （type 5）？（）

A.OSPF external LSAs are automatically flooded into all OSPF areas， unlike type 7 LSAs， which require that redistribution be configured.
B.External LSAs （type 5） are automatically changed to type 1 LSAs at ASBRs.
C.Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.
D.External network LSAs （type 5） redistributed from other routing protocols into OSPF are not permitted to flood into a stub area.

2.單項選擇題This question is about the formation of OSPF adjacency. An OSPF adjacency will not form correctly across a point-to-point link in the same area. Which would most likely cause this problem？（）

A.Each interface has a different OSPF cost.
B.Each interface is configured with secondary addresses as well as primary addresses.
C.Each interface has a different MTU size.
D.Each interface is configured with theip unnumbered loopback 0 command.

5.單項選擇題

On the basis of the network provided in the exhibit， all routers are configured to run EIGRP on all links. If the link between PG-R1 and PG-R2 fails， what is the maximum number of queries PG-R3 will receive for 192.168.1.0/24， assuming that all the packets sent during convergence are transmitted once （there are no dropped or retransmitted packets）？（）

A.PG-R3 will receive up to four queries for 192.168.1.0/24， one each from PG-R2， PG-R4， PGR5，and PG-R6.
B.PG-R3 will receive up eight queries for 192.168.1.0/24， one from PG-R2， two from PG-R4，three from PG-R5， and four from PG-R6.
C.PG-R3 will receive one query for 192.168.1.0/24， since the remote routers， PG-R4， PG-R5， and PG-R6， are natural stubs in EIGRP
D.PG-R3 will not receive any queries from PG-R2， because there are no alternate paths for 192.168.1.0/24.