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单选题Which of the following LAN technologies is considered fast Ethernet and uses two pairs of cabling,one pair for sending and the other pair for receiving?（）A 100Base-T4B 100Base-TXC 100Base-XD 100Base-FX

题目
单选题
Which of the following LAN technologies is considered fast Ethernet and uses two pairs of cabling,one pair for sending and the other pair for receiving?（）
A

100Base-T4

B

100Base-TX

C

100Base-X

D

100Base-FX

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

● 10BaseT is an Ethernet LAN term meaning a maximum transfer rate of 10Mbps that uses baseband signaling and twisted pair cabling. A 10BaseT Ethernet LAN has a （71） topology.

（71）

A．star

B．ring

C．bus

D．none of the above


正确答案：A

第2题：

Which of the following LAN technologies is considered fast Ethernet and uses two pairs of cabling,one pair for sending and the other pair for receiving?()

A.100Base-T4

B.100Base-TX

C.100Base-X

D.100Base-FX


参考答案：B

第3题：

The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?

A．Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive

B．Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link

C．Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

D．Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex ethernet uses a jam signal

E．None of the above


正确答案：C

第4题：

100BASE-TX makes use of two pairs of twisted pair cable, one pair used for transmission and the other for(69).

A．reception

B．detection

C．relation

D．connection


正确答案：A
解析：译文：100BASE-TX由两对双绞线构成，其中一对用于发送信号，另一对则负责接收信号。

第5题：

Which of the following uses pair authentication to provide a wireless connection between twodevices?()

A. 802.11n

B. Bluetooth

C. Infrared

D. Cellular


参考答案：B

第6题：

Which of the following pin pairs remain with the same wire color for either T568A or T568B?()

A. Pair 1 & 8

B. Pair 2 & 7

C. Pair 3 & 6

D. Pair 4 & 5


参考答案：D

第7题：

Which of the following LAN technologies is defined as fast Ethernet?()

A.10Base-T

B.100Base-T

C.100Base-FX

D.1000Base-T


参考答案：B

第8题：

Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? (Select two answer choices.)

A．Full-duplex Ethernet uses CSMA/CD to prevent collisions.

B．Half-duplex Ethernet uses a loopback circuit to detect collisions.

C．A full-duplex Ethernet card allows 20Mbps for data transmission.

D．Full-duplex Ethernet makes use of two pairs of wires for data.

E．An Ethernet hub can operate both half and full duplex simultaneously.


正确答案：BD
解析：Explanation:
Half-duplex Ethernet send and receives on the same line, so a loopback needs to be set to detect collisions. Alternatively, full-duple Ethernet doesn't have to because it uses two pairs of wire, one to send and the other to receive. Collisions are not possible on full duplex Ethernet networks.

Incorrect Answers:
A. Full duplex uses both pairs of wires, so transmissions are sent on the first pair, and data that is received come in on the other pair. This prevents collisions.

C. Full duplex allows for data to be sent and received at the same time. It will not double the amount of bandwidth at any given time. The speed of the Ethernet link will remain at 10/100.

E. Hubs are shared devices and can only support one mode, unlike switches.

第9题：

Which of the following describes what the number two represents in l00Base2 cabling?()

A. Fiber

B. Coaxial cable

C. UTP

D. Twisted pair


参考答案：B

第10题：

Flex Links are a pair of a Layer 2 interfaces (switchports or port channels), where one interface is configured to act as a backup to the other. Which two statements are correct regarding Flex Links?（）

A. An interface can only belong to single Flex Links.

B. An interface can belong to multiple Flex Links.

C. Flex Links operate only over single pairs of links.

D. Flex Links automatically disable STP so no BPDUs are propagated.


参考答案：C, D

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