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1-持续CSMA协议下,当一个用户要发送数据时,它首先侦听信道,看是否有其他站点在传送。如果信道忙,就持续等待直到信道空闲时,便将数据送出。若发生冲突,就等待一个随机长的时间,然后重新侦听。
对于这种协议,先考虑当前帧i时的前一帧时i-1,得到前一帧时的最后一帧frame0(相对时间最大的帧)的相对时间dt0,然后再在当前帧时查看有哪些帧的相对时间会小于dt0,这些帧若是发送就会与frame0发生冲突,所以这些帧就进入持续等待状态,这些帧并没有发送。再考虑当前帧余下的帧(dt > dt0),它们中的第一帧侦听到信道处于空闲状态,所以就发送,而其他的帧由于第一帧的发送又处于等待状态。若有大于或等于2个帧的相对时间相等,且它们又同时侦听到信道空闲时,就会同时发送而导致冲突,冲突发生后的处理方法同上两个协议的一样。
-1- CSMA continued under the agreement, when a user to send data, it first interception Channel to see if there are other sites in transmission. If Channel busy, continuing to wait until the idle channel, and put more information out. If there is conflict, it is a long wait for a random time, then re-interception. Such agreements, to consider the current frame i am one of the former when i-1, be a time before the final one frame0 (relative to the time frame) the relative dt0 time, and then when the current frame to detect what the relative time frame will be less than dt0, these frames will be sent if and frame0 conflict, th
- 2022-03-03 08:55:18下载
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SMTP pop in the given procedure to add a filter to enable the theme for the rece...
在给出的SMTP pop程序中加上一个过滤器,使能够对接收邮件的主题内容进行关键字过滤。关键字从文件中读出,不少于十个,比较结果符合的打印出过滤用关键字、邮件主题、邮件发件人。多重符合的每次结果都要打印。在windows Visual C++ 下调试-SMTP pop in the given procedure to add a filter to enable the theme for the receiving e-mail content filtering keywords. Keywords from the document read out, of not less than 10, in line with the results of the comparison with the print keyword filtering, mail the theme of the message sender. Multi-line with the results of each must be printed. In windows Visual C++ under the debugger
- 2022-04-20 20:17:43下载
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FTP Connecting To and Retrieving FTP File Listings
FTP Connecting To and Retrieving FTP File Listings
- 2022-01-26 06:23:28下载
- 积分:1
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sockets封装的udp,主要是自己用着方便
sockets封装的udp,主要是自己用着方便-sockets package udp, mainly with the convenience of their own
- 2022-03-14 00:42:48下载
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用socket 编程接口编写两个程序,分别为客户程序(client.c)和服务器程序(server.c),该程序应能实现下述命令功能:
get:取远方的一个...
用socket 编程接口编写两个程序,分别为客户程序(client.c)和服务器程序(server.c),该程序应能实现下述命令功能:
get:取远方的一个文件
put:传给远方一个文件
pwd:显示远主当前目录
dir:列出远方当前目录
cd :改变远方当前目录
? :显示你提供的命令
quit :退出返回
-Socket programming interface used to prepare the two procedures, namely client (client.c) and server (server.c), the program should be able to function to achieve the following command: get: get a file from afar put: to the distance a file pwd: display current directory far the main dir: lists the current remote directory cd: to change the current directory from afar? : Shows you the command quit: exit to return to
- 2023-02-27 03:40:03下载
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SupeSite 是一套独立的内容管理系统(CMS),并且拥有强大对 Discuz! 论坛信息和 UCenter Home 个人空间信息聚合的功能。为站长提供了...
SupeSite 是一套独立的内容管理系统(CMS),并且拥有强大对 Discuz! 论坛信息和 UCenter Home 个人空间信息聚合的功能。为站长提供了一个创新的社区门户解决方案。通过 SupeSite 软件,社区论坛相关内容可以完成智能化的提取,并可将相关联数据及时的更新, SupeSite 与站内论坛(Discuz!)和个人空间(UCenter Home)协同运转,能更加轻松地将网站庞大繁琐的数据资源进行有效整合,大大减少查找和管理上的不便,自动生成一个生态型 Web2.0 社区门户。
SupeSite 作为国内用户量最大,覆盖面最广的社区门户聚合软件,占据了国内 95 的市场份额。
-SupeSite 是一套独立的内容管理系统(CMS),并且拥有强大对 Discuz! 论坛信息和 UCenter Home 个人空间信息聚合的功能。为站长提供了一个创新的社区门户解决方案。通过 SupeSite 软件,社区论坛相关内容可以完成智能化的提取,并可将相关联数据及时的更新, SupeSite 与站内论坛(Discuz!)和个人空间(UCenter Home)协同运转,能更加轻松地将网站庞大繁琐的数据资源进行有效整合,大大减少查找和管理上的不便,自动生成一个生态型 Web2.0 社区门户。
SupeSite 作为国内用户量最大,覆盖面最广的社区门户聚合软件,占据了国内 95 的市场份额。
- 2023-03-31 10:40:04下载
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This book guides software professionals through the traps and pitfalls of develo...
This book guides software professionals through the traps and pitfalls of developing efficient, portable, and flexible networked applications. It explores the inherent design complexities of concurrent networked applications and the tradeoffs that must be considered when working to master them.
- 2022-02-06 21:12:05下载
- 积分:1
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一个实现点对点传输的小程序,可以用来了解WINDOWS套接字
一个实现点对点传输的小程序,可以用来了解WINDOWS套接字-achieve a point-to-point transmission of small programs can be used to understand the Windows Sockets
- 2022-01-26 00:59:49下载
- 积分:1
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FLASH源码素材
FLASH源码素材-甜蜜恋人系列02 甜蜜恋人系列02 -FLASH source material-sweet lovers Series 02 lovers sweet sweet lovers Series 02 lovers sweet lovers Series 02 Series 02
- 2023-08-17 22:40:03下载
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HTTP download reference, easily understood, for beginners
HTTP下载的参考,较容易理解,适合初学者-HTTP download reference, easily understood, for beginners
- 2022-12-16 22:00:04下载
- 积分:1