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多項選擇題What are three valid reasons to assign ports to VLANs on a switch? （）

A.to make VTP easier to implement
B.to isolate broadcast traffic
C.to increase the size of the collision domain
D.to allow more devices to connect to the network
E.to logically group hosts according to function
F.to increase network security

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1.單項選擇題In which integration method is an IPV6 packet encapsulated within an IPV4 protocol？（）

A.proxy
B.dual-stack
C.tunneling
D.dot1q

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2.單項選擇題How many collision domains are shown（）。

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

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3.單項選擇題 The Frame Relay network in the diagram is not functioning properly.What is the cause of the problem？（）

A.The Gallant router has the wrong LM Itype configured
B.Inverse ARP is providing the wrong PVC information to the Gallant router
C.The S3 interface ofthe Steele router has been configured with the frame-relay encapsulation ietf command
D.The frame-relay map statement in the Attalla router for the PVC to Steele is not correct
E.The IP address on the serial interface of the Attalla router is configured incorrectly

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4.多項選擇題Which are valid modes for a switch port used as a VLAN trunk (Choose three.)（）。

A.transparent
B.auto
C.on
D.desirable
E.blocking
F.forwarding

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5.單項選擇題Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet（）。

A.Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link.
B.Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex Ethernet uses a jam signal.
C.Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth.
D.Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive.

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