單項選擇題Which command enables IPv6 forwarding on a cisco router?（）

A.ipv6 host
B.ipv6 unicast-routing
C.ipv6 local
D.ipv6 neighbor


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1.多項選擇題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

2.多項選擇題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.

3.多項選擇題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.

4.多項選擇題Which two are features of IPv6?（）

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

5.單項選擇題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.

6.單項選擇題

Refer to the exhibit. What is the most appropriate summarization for these routes?（）

A.10.0.0.0/21
B.10.0.0.0/22
C.10.0.0.0/23
D.10.0.0.0/24

8.單項選擇題What is the first 24 bits in a MAC address called?（）

A. NIC
B. BIA
C. OUI
D. VAI

9.單項選擇題What is known as "one-to-nearest" addressing in IPv6?（）

A.global unicast
B.anycast
C.multicast
D.unspecified address

10.多項選擇題Refer to the exhibit. A junior network administrator was given the task of configuring port security on SwitchA to allow only PC_A to access the switched network through port fa0/1. If any other device is detected, the port is to drop frames from this device. The administrator configured the interface and tested it with successful pings from PC_A to RouterA, and then observes the output from these two show commands.Which two of these changes are necessary for SwitchA to meet the requirements? （）

A.Port security needs to be globally enabled.
B.Port security needs to be enabled on the interface.
C.Port security needs to be configured to shut down the interface in the event of a violation.
D.Port security needs to be configured to allow only one learned MAC address.
E.Port security interface counters need to be cleared before using the show command.
F.The port security configuration needs to be saved to NVRAM before it can become active.