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A simple LAN configuration
The most important thing is to switch.
To communicate to each PC must have a name.
Two .IP address
IP address is a unique identifier, a network coding (binary), consists of 32 bits.
Each part of the 8-bit binary.
1.IP address rule
III. Subnet Mask
比如说 10.1.1.1 ：
可以让10是网络位（网段），1.1.1就是名字（主机位）
Vernacular time: you have to remember a few 255 to a few web site. And 255 corresponding to the network position.
PS: an IP address, a subnet mask must be configured.
Four .IP Addresses in Depth
1. Category
ABC class has a default subnet mask!
If the multicast address is 224.0.0.6, it represents a combination of several ip addresses, for example, more than one person watching a movie at the same time, server centrally, can be understood as several pc machine.
2. Case 1
Broadcast address is the Big Horn Ha!
3. Case 2
V. Gateway
This picture vivid, through a gateway (router), achieved without network segments (intranet and extranet) access JD.
Six .DNS
In public DNS server online, JD first purchase domain name, form parsing record, PC JD can be accessed through the domain name.
This picture more vivid! !
If the DNS server hacking attacks the very nb.
VII. Configuring IP address
Open three virtual machines.
In VMware configure their own right! !
VIII. Network Test Command
无外乎使用 ipconfig查看自己的ip
用 ipconfig /all还可以查看mac唯一物理地址
用 ping命令查看几台pc中是否可以互相通信
ping不通的情况有可能是因为防火墙
This time you pull the network cable, it is certainly not communicate.
