osi模型:七层模型介绍
It is the top most layer of OSI Model. Manipulation of data(information) in various ways is done in this layer which enables user or software to get access to the network. Some services provided by this layer includes: E-Mail, transferring files, distributing the results to user, directory services, network resources, etc.
它是OSI模型的最顶层。 在此层中以各种方式处理数据(信息),使用户或软件能够访问网络。 该层提供的一些服务包括:电子邮件,传输文件,将结果分发给用户,目录服务,网络资源等。
The Application Layer contains a variety of protocols that are commonly needed by users. One widely-used application protocol is HTTP(HyperText Transfer Protocol), which is the basis for the World Wide Web. When a browser wants a web page, it sends the name of the page it wants to the server using HTTP. The server then sends the page back.
应用层包含用户通常需要的各种协议。 一种广泛使用的应用协议是HTTP(超文本传输协议) ,它是万维网的基础。 当浏览器需要网页时,它将使用HTTP将其想要的页面的名称发送到服务器。 然后,服务器将页面发回。
Other Application protocols that are used are: File Transfer Protocol(FTP), Trivial File Transfer Protocol(TFTP), Simple Mail Transfer Protocol(SMTP), TELNET, Domain Name System(DNS) etc.
使用的其他应用程序协议是: 文件传输协议(FTP) , 普通文件传输协议(TFTP) , 简单邮件传输协议(SMTP) , TELNET , 域名系统(DNS)等。
There are commonly reoccurring problems that occur in the design and implementation of Application Layer protocols and can be addressed by patterns from several different pattern languages:
在应用层协议的设计和实现中,经常会发生一些常见的问题,可以通过几种不同的模式语言来解决:
翻译自: https://www.studytonight.com/computer-networks/osi-model-application-layer
osi模型:七层模型介绍