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填空題衡量網(wǎng)絡性能的主要標準是（）、（）。

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1.多項選擇題一個子網(wǎng)掩碼為255.255.240.0的網(wǎng)絡中，（）為合法網(wǎng)段地址。

A.150.150.0.0
B.150.150.0.8
C.150.150.8.0
D.150.150.16.0

2.多項選擇題All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A (Choose two.)（）。

A.Network A - 172.16.3.48/26
B.Network A - 172.16.3.128/25
C.Network A - 172.16.3.192/26
D.Link A - 172.16.3.0/30
E.Link A - 172.16.3.40/30
F.Link A - 172.16.3.112/30

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3.多項選擇題 The switches shown in the diagram, Core and Core2, are both Catalyst 2950s. The addressing scheme for each company site is as follows:Router Ethernet port - 1st usable addressCore - 2nd usable addressCore2 - 3rd usable addressFor this network, which of the following commands must be configured on Core2 to allow it to be managed remotely from any subnet on the network? （）

A.Core2(config)# interface f0/0 Core2(config-if)# ip address 192.168.1.10 255.255.255.248
B.Core2(config)# interface vlan 1 Core2(config-if)# ip address 192.168.1.11 255.255.255.248
C.Core2(config)# line con 0 Core2(config-line)# password cisco
D.Core2(config)# line vty 0 4 Core2(config-line)# password cisco
E.Core2(config)# ip default-gateway 192.168.1.9
F.Core2(config)# ip route 0.0.0.0 0.0.0.0 192.168.1.8

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4.單項選擇題Which type of EIGRP route entry describes a fesible successor？（）

A.a primary route，stored in the routing table
B.a backup route，stored in the routingt able
C.a backup route，stored in the topology table
D.A primary route，stored in the topology table

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5.單項選擇題無類路由協(xié)議路由表表目為三維組，其中不包括（）。

A.子網(wǎng)掩碼
B.源網(wǎng)絡地址
C.目的網(wǎng)絡地址
D.下一跳地址

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6.單項選擇題VLAN tag在OSI參考模型的哪一層？（）

A.應用層
B.表示層
C.會話層
D.傳輸層
E.網(wǎng)絡層
F.鏈路層
G.物理層

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7.判斷題RIP協(xié)議引入路由保持機制的作用是防止路由形成環(huán)路。

參考答案：對

8.單項選擇題While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist（）。

A.the session layer
B.the protocol layer
C.the data link layer
D.the access layer
E.the network layer
F.the application layer

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9.多項選擇題Which statements describe the routing protocol OSPF? （）

A.It supports VLSM.
B.It is used to route between autonomous systems.
C.It confines network instability to one area of the network.
D.It increases routing overhead on the network.
E.It allows extensive control of routing updates.
F.It is simpler to configure than RIP v2.

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10.多項選擇題Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true (Choose two.)（）。

A.Router C will use ICMP to inform Host 1 that Host 2 cannot be reached
B.Router C will use ICMP to inform Router B that Host 2 cannot be reached
C.Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached
D.Router C will send a Destination Unreachable message type
E.Router C will send a Router Selection message type
F.Router C will send a Source Quench message type

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