Refer to the exhibit. Router E learned about the PIM RP （designated as 7.7.7.7） from four different sources. Routers A and D advertised the 7.0.0.0 network via EIGRP. Routers B and C advertised the 7.0.0.0 network via OSPF. Considering that all four Ethernet interfaces on router E could potentially lead back to the PIM-RP， when router E receives the first multicast packet down the shared tree， which incoming interface will be used to successfully pass the RPF check？（）

单项选择题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.

单项选择题Based on the output provided in the exhibit， to which address or location will the router forward a packet sent to 192.168.32.1？（）

A.10.1.1.1
B.10.1.1.2
C.10.1.1.3
D.The default gateway

单项选择题Whatarethemandatory，well-knownBGPattributes？（）

A.origin,AS-path,next-hop
B.AS-path,origin,MED
C.AS-path,origin,weight
D.AS-path,weight,MED

单项选择题YouuseOSPFasyournetworkroutingprotocol.YouusethecommandshowiprouteandyouseeseveralroutesdescribedasO，OIA，OE1，andOE2.Whatroutesareinyourarea？（）

A.O IA
B.O E1
C.O E2
D.O

单项选择题YourCisconetworkcurrentlyrunsOSPFandyouhaveaneedtopolicy-routesomespecifictraffic，regardlessofwhattheroutingtableshows.Whichoneoftheseoptionswouldenableyoutopolicy-routethetraffic？（）

A.source IP address and the protocol （such as SSL， HTTPS， SSH）
B.the packet Time to Live and the source IP address
C.type of service header and DSCP value
D.destination IP address