問答題What’s PHB？

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1.單項(xiàng)選擇題What are the mandatory， well-known BGP attributes？（）

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

4.單項(xiàng)選擇題Your Cisco network currently runs OSPF and you have a need to policy-route some specific traffic， regardless of what the routing table shows. Which one of these options would enable you to policy-route the traffic？（）

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

5.單項(xiàng)選擇題

Refer to the exhibit. Routers A and B are directly connected and running OSPF， but they are unable to form a neighbor relationship. What is the most likely cause？（）

A.The routers are not on the same network.
B.The network statements do not match.
C.The process number does not match.
D.The MTU does not match.
E.The OSPF cost does not match.
F.There is a physical issue with the cable.