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多項(xiàng)選擇題What are two security appliances that can be installed in a network? （）

A.ATM
B.IDS
C.IOS
D.IOX
E.IPS
F.SDM

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1.多項(xiàng)選擇題Which of the following describes the roles of devices in a WAN?（）

A.A CSU/DSU terminates a digital local loop.
B.A modem terminates a digital local loop.
C.A CSU/DSU terminates an analog local loop.
D.A modem terminates an analog local loop.
E.A router is commonly considered a DTE device.
F.A router is commonly considered a DCE device.

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2.單項(xiàng)選擇題Two buildings on the San Jose campus of a small company must be connected to use Ethernet with a bandwidth of at least 100 Mbps. The company is concerned about possible problems from voltage potential differences between the two buildings. Which media type should be used for the connection（）。

A.UTP cable
B.STP cable
C.coaxial cable
D.fiber optic cable

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3.多項(xiàng)選擇題Switch ports operating in which two roles will forward traffic according to the IEEE 802.1w standard?（）

A.alternate
B.backup
C.designated
D.disabled
E.root

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4.單項(xiàng)選擇題Which protocol is an open standard protocol framework that is commonly used in VPNs,to provid secure end-to-end communication?（）

A.L2TP
B.IPsec
C.PPTP
D.RSA

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5.多項(xiàng)選擇題Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? （）

A.HDLC
B.Ethernet
C.Token Ring
D.PPP
E.FDDI
F.Frame Relay

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6.單項(xiàng)選擇題 Refer to the exhibit.How many broadcast domains exist in the exhibited topology？（）

A.one
B.two
C.three
D.four
E.five
F.six

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7.單項(xiàng)選擇題 A routing protocol is required that supports:
1)routing update authentication
2)an addressing scheme that conserves IP addresses
3)multiple vendors
4)a network with over 50 routers Which routing protocol fulfills these requirements（）。

A.RIPv1
B.RIPv2
C.EIGRP
D.OSPF

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8.多項(xiàng)選擇題Which two Ethernet fiber-optic modes support distances of greater than 550 meters？（）

A.1000BASE-CX
B.100BASE-FX
C.1000BASE-LX
D.1000BASE-SX
E.1000BASE-ZX

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9.多項(xiàng)選擇題A Catalyst 2950 needs to be reconfigureD.What steps will ensure that the old configuration is erased?（）

A.Erase flash.
B.Restart the switch.
C.Delete the VLAN database.
D.Erase the running configuration.
E.Erase the startup configuration.
F.Modify the configuration register.

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10.多項(xiàng)選擇題Which three statements accurately describe layer 2 Ethernet switches？（）

A.Microsegmentation decreases the number of collisions on the network.
B.if a switch receives a frame for an unkown destination，it uses ARP to resolve the address.
C.Spanning Tree Protocol allows switches to automatically share vlan information.
D.In a properly functioning network with redundant switched paths，each swiched aegment will contain oneroot bridge with all its ports in the forwarding state.All other switches in that broadcast domain will haveonly one root port.
E.Establishing vlans increases the number of broadcast domains.
F.Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3address information.

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