A link light on a switch is an example of which of the following Ethernet properties?（）A、Collision detectionB、Multiple access pointsC、Carrier senseD、Collision avoidance

题目

A link light on a switch is an example of which of the following Ethernet properties?（）

A、Collision detection
B、Multiple access points
C、Carrier sense
D、Collision avoidance

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第1题：

Which two statements describe the operation of the CSMA/CD access method, which is in use on the Ezonexam network? (Choose two)

A. After a collision, the station that detected the collision has first priority to resend the lost data.

B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.

C. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.

D. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method.

E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.

正确答案：BE
B,E 解析：Explanation:
Ethernet networking uses Carrier Sense Multiple Access with Collision Detect (CSMA/CD), a protocol that helps devices share the bandwidth evenly without having two devices transmit at the same time on the network medium. CSMA/CD was created to overcome the problem of those collisions that occur when packets are transmitted simultaneously from different nodes. And trust me, good collision management is crucial, because when a node transmits in a CSMA/CD network, all the other nodes on the network receive and examine that transmission.

Only bridges and routers can effectively prevent a transmission from propagating throughout the entire network! So, how does the CSMA/CD protocol work? Like this: when a host wants to transmit over the network, it first checks for the presence of a digital signal on the wire. If all is clear (no other host is transmitting), the host will then proceed with its transmission.

But it doesn't stop there. The transmitting host constantly monitors the wire to make sure no other hosts begin transmitting. If the host detects another signal on the wire, it sends out an extended jam signal that causes all nodes on the segment to stop sending data (think, busy signal). The nodes respond to that jam signal by waiting a while before attempting to transmit again. Backoff algorithms determine when the colliding stations can retransmit. If collisions keep occurring after 15 tries, the nodes attempting to transmit will then time out.

第2题：

Determining when to retransmit frames is an example of which of the following Ethernet properties?()

A. Carrier sense

B. Collision detection

C. Multiple access points

D. Collision avoidance

参考答案：B

第3题：

IEEE802.3以太网采用_____协议以支持总线性结构，它的全称是()。

A.STP，Spanning Tree Protocol

B.STP，Shortest Tree Protocol

C.CSMA/CD Carrier Sense Multicast Access/Collision Detection

D.CSMA/CD Carrier Sent Multicast Access/CRC Detection

E.CSMA/CD Carrier Service Multiple Access/Collision Detection

F.CSMA/CD Carrier Sense Multiple Access/Collision Detection

正确答案：F

第4题：

Wlse uses snmp communication with an ethernet switch for what purpose？（）

A、shut down rogue access points
B、configure access points
C、discover access points
D、inventory access points

正确答案:A

第5题：

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?（）

A、This is a 10 Mb/s switch port.
B、This is a 100 Mb/s switch port.
C、This is an Ethernet port operating at half duplex.
D、This is an Ethernet port operating at full duplex.
E、This is a port on a network interface card in a PC

正确答案:C

第6题：

A link light on a switch is an example of which of the following Ethernet properties?()

A. Collision detection

B. Multiple access points

C. Carrier sense

D. Collision avoidance

参考答案：C

第7题：

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port（）。

A、This is a 10 Mb/s switch port
B、This is a 100 Mb/s switch port
C、This is an Ethernet port operating at half duplex
D、This is an Ethernet port operating at full duplex
E、This is a port on a network interface card in a PC

正确答案:C

第8题：

is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.

A．Repeater

B．Router

C．Bridge

D．Switch

正确答案：B

第9题：

Which two statements about 10 Gigabit Ethernet （10GE） are true？（）

A、10 Gigabit Ethernet does not support VLAN definition
B、10 Gigabit Ethernet supports full duplex links， but does not support half duplex links
C、10 Gigabit Ethernet supports unshielded or shielded twisted-pair cable connections
D、10 Gigabit Ethernet supports Carrier Sense Multiple Access with Collision Detection （CSMA/CD）
E、10 Gigabit Ethernet supports optical fiber connections in single mode only. Mufti mode is not supported

正确答案:B,C

第10题：

Which statement is true regarding an Ethernet collision domain?（）

A、If a router is used, the collision domain includes all devices connected to the router.
B、If a hub is used, the collision domain is limited to each device and the hub.
C、If a switch is used, the collision domain is limited to each device and the switch.
D、If a bridge is used, the collision domain includes all devices connected to the bridge.

正确答案:C

A link light on a switch is an example of which of the following Ethernet properties?（）A、Collision detectionB、Multiple access pointsC、Carrier senseD、Collision avoidance

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