单项选择题
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
单项选择题 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？（）
多项选择题 InyourCiscoEIGRPnetwork，younoticethattheneighborrelationshipbetweentwoofyourrouterswasrecentlyrestarted.Whichtwoofthesechoicescouldhavemadethisoccur？（）
多项选择题 Router1isconfiguredforBGPasdual-homedontheCisconetwork.WhichthreeBGPattributesarecarriedineveryBGPupdateonthisrouter（bothIBGPandEBGP）？（）