首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
计算机
On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision
On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision
admin
2009-05-19
38
问题
On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hosts do? (Select all valid answers)
A. The destination host sends a request to the source for retransmission.
B. The jam signal indicates that the collision has been cleared.
C. The hosts will attempt to resume transmission after a time delay has expired.
D. An electrical pulse indicates that the collision has cleared.
E. The router on the segment will signal that the collision has cleared.
F. The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission.
选项
答案
C
解析
Explanation:
When a host on an Ethernet LAN has information to send, the following steps are taken:
1. A device with a frame to send listens until Ethernet is not busy.
2. When the Ethernet is not busy, the sender begins sending the frame.
3. The sender listens to make sure that no collision occurred.
4. Once the senders hear the collision, they each send a jamming signal, to ensure that all stations recognize the collision.
5. After the jamming is complete, each sender randomizes a timer and waits that long.
6. When each timer expires, the process starts over with step 1.
转载请注明原文地址:https://kaotiyun.com/show/pMhZ777K
本试题收录于:
思科640802题库思科认证分类
0
思科640802
思科认证
相关试题推荐
Fewthingssay"forgetI’mhere"quitesoeloquentlyastheposeoftheshy—theavertedgaze,thehunchedshoulders,thebodypi
Writeanessayof160~200wordsbasedonthefollowingdrawing.Inyouressay,youshould1)describethedrawingbriefly,
Writeanessayof160-200wordsbasedonthefollowingdrawing.Inyouressay,youshould1)describethedrawingbriefly,
Writeanessayof160-200wordsbasedonthefollowingdrawing.Inyouressay,youshould1)describethedrawingbriefly,
Youfailedtofinishanimportanttaskassignedbyyourprofessorbecauseofasevereillness.Writealettertoyourprofessor
Inorderto"changelivesforthebetter"andreduce"dependency,"GeorgeOsborne,ChancelloroftheExchequer,introducedthe
Peoplehavespeculatedforcenturiesaboutafuturewithoutwork.Todayisnodifferent,withacademics,writers,andactivists
Writealettertoapologizetoyourfriend,Anna.Youpromisedtogotothetheaterwithher,butforsomereasonsyoucan’tat
随机试题
行政处罚显失公正主要有以下情形:________。同样情况,________对待;不同情况,________对待。反复无常。
下列说法中正确的一项是()
诊断慢性阻塞性肺病时,确定不完全可逆的气流受限的条件是指
价值工程涉及到( )三个基本要素。
少年期是多事之秋,心理学家称之为“危险期”,因此,对这一阶段的少年定要严加看管。()
下列哪项不属于大学科研成果?()
跑步:动作
某单位组织员工进行拓展训练,沿公路从甲地步行至乙地,再由乙地立即原路返回甲地。如果员工每天行进的路程比前一天增加l千米,则去时用4天走完的路程,返回时用了3天,问:甲地到乙地总共多远?
从某意义上讲,系统的______是比计算机系统工程更基础甚至是更困难的工程。
InAmerica,peoplearefacedwithmoreandmoredecisionseveryday,【C1】______it’spickingoneofthirty-oneicecream【C2】______
最新回复
(
0
)