首页
登录
从业资格
CSMA,although more efficient than ALOHA
CSMA,although more efficient than ALOHA
考试题库
2022-08-02
50
问题
CSMA,although more efficient than ALOHA or slotted ALOHA,still has one glaring inefficiency.If the medium is busy,the station will wait for a random amount of time. When two frames collide,the medium remains ( ) for the duration of transmission of both damaged frames. The use of random delays reduces the probability of( ). For( )frames,compared to propagation time,the amount of wasted capacity can be considerable.This waste can be reduced if a station continues to listen to the medium while( ).The maximum utilization depends on the length of the frame and on the( ) time; the longer the frames or the shorter the propagation time,the higher the utilization..A.collidingB.forwardingC.transmittingD.receiving
选项
A.colliding
B.forwarding
C.transmitting
D.receiving
答案
C
解析
尽管CSMA的效率远远大于ALOHA或时隙ALOHA,但它依然存在一个显著低效的情况。当信道忙的时候,站点需要等待一段随机时间。当两个帧发生冲突时,在两个被破坏帧的传输持续时间内,信道仍然无法使用。使用随机时延会降低冲突的可能性,但是如果帧的长度相对于传播时间来说很长,那么容量的浪费也是很可观的。如果站点继续边发送边监听,这种浪费可以减少。最大利用率取决于帧的长度和传播时间; 帧越长或传播时间越短,利用率越高。
转载请注明原文地址:https://www.tihaiku.com/congyezige/2430924.html
本试题收录于:
初级网络管理员题库软件水平考试初中高级分类
初级网络管理员
软件水平考试初中高级
相关试题推荐
CSMA,althoughmoreefficientthanALOHA
CSMA,althoughmoreefficientthanALOHA
CSMA,althoughmoreefficientthanALOHA
CSMA,althoughmoreefficientthanALOHA
CSMA,althoughmoreefficientthanALOHA
CSMA,althoughmoreefficientthanALOHA
Althoughthebulkofindustryresources
Althoughthebulkofindustryresources
Althoughthebulkofindustryresources
Althoughthebulkofindustryresources
随机试题
WhenBobwaseighteen,he______goingaroundwithastrangesetofpeopleands
[img]2016m3x/ct_eyyjsbz2014c_eyyjsbcloze_0226_20163[/img]Thewildboarist
Althoughhislawyerswere______,theycouldn’tbesureaboutthefinaloutcome
[originaltext][16]Theprivatemotorvehiclehasgivenusafreedomourancesto
当事人订立合同时,一方不得将自己的意志强加给另一方。这体现了合同订立的( )原则
某城市轻轨工程的建设单位自行办理招标事宜。由于该工程技术复杂,建设单位决定采用邀
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
甲企业共生产18种产品,其产品组合为3种洗涤剂、4种香皂、5种纸巾和6种洗发水。
下列污水处理厂站中,适宜接纳处理小型养殖场废水的是()。A.城镇污水处理厂
根据《建设项目工程总承包管理规范》的规定,建设项目工程总承包的管理工作一般不涉及
最新回复
(
0
)