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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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1.多項選擇題The network 172.25.0.0 has been divided into eight equal subnets. Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router? （）

A.172.25.78.243
B.172.25.98.16
C.172.25.72.0
D.172.25.94.255
E.172.25.96.17
F.172.25.100.16

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2.單項選擇題Why does RouterA show multiple unequal cost paths to network 192.168.81.0/24（）。

A.A variance was configured for EIGRP autonomous system 109.
B.The EIGRP topology table displays all routes to a destination.
C.The EIGRP topology table shows only backup routes to a destination.
D.Multiple floating static routes were configured to network 192.168.81.0 via interface Serial0.

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3.多項選擇題What are the possible trunking modes for a switch port? （）

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

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4.多項選擇題What should be done prior to backing up an IOS image to a TFTP server? （）

A.Make sure that the server can be reached across the network.
B.Check that authentication for TFTP access to the server is set.
C.Assure that the network server has adequate space for the IOS image.
D.Verify file naming and path requirements.
E.Make sure that the server can store binary files.
F.Adjust the TCP window size to speed up the transfer.

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5.多項選擇題Workstation A has been assigned an IP address of 192.0.2.24/28.Workstation B has been assigned an IP address of 192.0.2.100/28.The two workstations are connected with a straight-through cable.Attempts to ping between the hosts are unsuccessful. What two things can be done to allow communications between the hosts？（）

A.Replace the straight-through cable with a crossover cable
B.Change the subnet mask of the hosts to /25
C.Change the subnet mask of the hosts to /26
D.Change the address of Workstation A to 192.0.2.15
E.Change the address of Workstation B to 192.0.2.111

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