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單項選擇題哪種擴頻技術是802.11B定義使用的？（）

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR，F(xiàn)HSS，and DSSS

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1.單項選擇題What is the effect of the following access list condition access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。

A.permit all packets matching the first three octets of the source address to all destinations
B.permit all packets matching the last octet of the destination address and accept all source addresses
C.permit all packets from the third subnet of the network address to all destinations
D.permit all packets matching the host bits in the source address to all destinations
E.permit all packets to destinations matching the first three octets in the destination address

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2.單項選擇題Which IPV6 routing protocol uses multicast group FF02::9 to send updates?（）

A.RIPng
B.OSPFv3
C.static
D.IS-ISfor IPv6

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3.單項選擇題 根據(jù)下圖，R1能通告給R2的最有效的匯總是？（）

A.172.1.0.0/22
B.172.1.0.0/21
C.172.1.4.0/22
D.172.1.4.0/24 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24
E.172.1.4.0/25 172.1.4.128/25 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24

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4.多項選擇題What are three IPv6 transition mechanisms?（）

A.6to4 tunneling
B.VPN tunneling
C.GRE tunneling
D.ISATAP tunneling
E.PPP tunneling
F.Teredo tunneling

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5.單項選擇題Given the output of the Floor3 switch, what statement describes the operation of this switch（）。

A.VTP is disabled on this switch.
B.The switch can create, change, and delete VLANs.
C.The switch learns VLAN information but does not save it to NVRAM.
D.The switch can create VLANs locally but will not forward this information to other switches.
E.The switch learns VLAN information and updates the local VLAN data base in NVRAM.

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6.單項選擇題Running both IPv4 and IPv6 on a router simultaneously is known as what?（）

A.4to6 routing
B.6to4 routing
C.binary routing
D.dual-stack routing
E.NextGen routing

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7.單項選擇題What is the default maximum number of equal-cost paths that can be placed into the routing of a cisco OSPF router?（）

A.16
B.2
C.unlimited
D.4

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8.多項選擇題Which two states are the port states when RSTP has converged？（）

A.blocking
B.learning
C.disabled
D.forwarding
E.listening

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9.單項選擇題A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role as root bridge（）。

A.Establish a direct link from the switch to all other switches in the network.
B.Assign the switch a higher MAC address than the other switches in the network have.
C.Configure the switch so that it has a lower priority than other switches in the network.
D.Configure the switch for full-duplex operation and configure the other switches for half-duplex operation.
E.Connect the switch directly to the MDF router, which will force the switch to assume the role of root bridge.

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10.單項選擇題 Host1的用戶想PING DSL調制解調器/路由器的192.168.1.254，ARP表如下圖，Host1會怎么操作？（）

A.發(fā)送一個單播ARP包到DSL調制解調器/路由器
B.發(fā)送一個單播ICMP包到DSL調制解調器/路由器
C.發(fā)送三層廣播包到響應的DSL調制解調器/路由器
D.發(fā)送一個可以被Host2，the switch，and the DSL modem/router 受到的2層廣播幀

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