Which command enables IPv6 forwarding on a cisco router?（）

多项选择题What are three features of the IPV6 protocol?（）

A.complicated header
B.plug-and-play
C.no broadcasts
D.checksums
E.optional IPsec
F.autoconfiguration

多项选择题A network administrator needs to configure port security on a switch.which two statements are true? （）

A.The network administrator can apply port security to dynamic access ports
B.The network administrator can configure static secure or sticky secure mac addresses in the voice vlan.
C.The sticky learning feature allows the addition of dynamically learned addresses to the running configuration.
D.The network administrator can apply port security to EtherChannels.
E.When dynamic mac address learning is enabled on an interface,the switch can learn new addresses,up to the maximum defined.

多项选择题Which two are advantages of static routing when compared to dynamic routing?（）

A.Security increases because only the network administrator may change the routing tables
B.Configuration complexity decreases as network size increases
C.Routing updates are automatically sent to neighbors
D.Route summarization is compued automatically by the router
E.Routing traffic load is reduced when used in stub network links
F.An efficient algorithm is used to build routing tables,using automatic updates
G.Routing tables adapt automatically to topology changes.

多项选择题Which two are features of IPv6?（）

A.multicast
B.broadcast
C.allcast
D.podcast
E.anycast

单项选择题What is the difference between a CSU DSU and a modem？（）

A.A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.
B.A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.
C.A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.
D.A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.