During the IPv6 address resolution，a node sends a neighbor solicitation message in order to discover which of these？（）

多项选择题YourcompanyisresearchinganewapplicationthatrunsoverIPv6，butpartofitmuststillhaveIPv4support.YourcompanyusesatraditionalIPv4network.YourplanisnottorunIPv6overthewholenetwork，buttosegmentpartsofthenetworkoreventooperatesimultaneouslywithIPv6andIPv4.YoumustmakeabriefpresentationaboutIPv6technologytotheboardoftechnicaldirectors.Whichthreeoftheseitemscouldbepartofyourpresentation？（）

A.Tunnel IPv6 over IPv4 to connect far-end IPv6 networks.
B.Explain why configuring IPv4 and IPv6 at the same time over the same LAN interface is not possible.
C.Explain why configuring IPv4 and IPv6 at the same time over the same LAN interface is possible.
D.What is the meaning of EUI-64 and how does it work？
E.Tunnel IPv4 over IPv6 to connect far-end IPv4 networks.

多项选择题HalfofyournetworkusesRIPv2andtheotherhalfrunsOSPF.Thenetworksdonotcommunicatewitheachother.WhichtwoofthesefactorsdescribetheimpactofactivatingEIGRPovereachseparatepart？（）

A.EIGRP will not be accepted when configured on the actual RIPv2 routers.
B.OSPF will no longer be used in the routing table， because you only have EIGRP internal routes running.
C.OSPF will no longer be used in the routing table， because you only have EIGRP external routes running.
D.RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP external routes running.
E.RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP internal routes running.
F.OSPF database will have RIPv2 routes.

单项选择题WhatsthedefaultstratumclockonaCiscorouter，whenyouseethekeyword master configuredontheNTPline？（）

A.1
B.2
C.4
D.6
E.8

多项选择题ThecoreofanetworkhasfourroutersconnectedinasquaredesignwithGigabitEthernetlinksusing 30subnets.Thenetworkisusedtocarryvoicetrafficandotherapplications.Convergencetimeistakingmorethanexpected.WhichthreeactionswouldyoutaketoimproveOSPFconvergencetime？（）

A.Increase MTU of the interfaces to accommodate larger OSPF packets.
B.Change the network type to point-to-point on those links.
C.Reduce SPF initial timer.
D.Increase hello interval to avoid adjacency flapping.
E.Enable OSPF

单项选择题UnicastReversePathForwardingcanperformalloftheseactionsexceptwhichone？（）

A.examine all packets received to make sure that the source addresses and source interfaces appear in the routing table and match the interfaces where the packets were received
B.check to see if any packet received at a router interface arrives on the best return path
C.combine with a configured ACL
D.log its events，if you specify the logging options for the ACL entries used by the unicast rpf command
E.inspect IP packets encapsulated in tunnels， such as GRE