CentOS-6.5-x86_64-bin-DVD1.iso 和 CentOS-6.5-x86_64-bin-DVD2.iso 什么关系？

Question

http://mirrors.sohu.com/centos/6.5/isos/x86_64/
CentOS-6.5-x86_64-bin-DVD1.iso 和 CentOS-6.5-x86_64-bin-DVD2.iso 什么关系？
网上看说后者是前者的补丁？
我自己在虚拟机里测试，还需要两个都装么？补丁怎装我也没搞过。
6.5版本是否稳定，我之前都是用的6.4的。

Answer 1

In fact, just look at the files under mount and you will know that DVD2 should be the software package and DVD1 should be the system

Answer 2

DVD1：基本系统+部分软件包。
DVD2: More packages.

Answer 3

dvd1 is the system and dvd2 is some software or something. 2. It will not affect the use if not installed.

Answer 4

1 is the basic system, 2 is the software package collection.