Learning Objectives
Setup and run the simulation
Examine the results
学习目标:
配置与运行模拟模式
验证实验结果
Introduction:
UDP is a connectionless protocol. It is used in place of TCP where speed is important and reliability is not a concern. Domain Name System (DNS) uses UDP as its transport protocol. When a web page is requested using a URL, the IP address must be learned from a DNS server before a web request can be encapsulated in an IP packet. This activity will focus on the exchange of DNS information between a PC and a server using UDP.
实验介绍:
UDP是一种面向连接的协议。它被运用在对速度和可靠性要求不高的TCP下。域名系统(DNS)使用UDP作为其传输协议。当一个网页通过URL被请求时,IP地址必须在封装成IP包之前从DNS哪里获取。这次实验将关注电脑和服务器之间是怎样用UDP交换DNS信息的。