For example:

1, ADSL dialing, the IP of most ADSL users is dynamic IP, and the IP dialed each time is different. A fixed IP, of course, except for telecommunications.

2. Intranet IP address. , the computer in the network, IP address, can be set manually, can't change, is static!

Automatically obtain the IP assigned to an IP router, and then if it is not renewed within the lease period, it will become another dynamic IP address, which can be regarded as a dynamic quantity.

Supplement to your question:

A:

1, the IP address of your LAN, for example, the static IP dynamic IP of your machine is 192. 168. 1, and the IP address of the external network doesn't matter, because the external network, the machine doesn't know your LAN address is192./kloc-0. 10. 1。 The external network only knows the address or address assigned to you by your ADSL, and there is no ADSL plug-in, which can be used. This may be because you don't understand, which requires you to read books.

It is useful to prevent ARP from binding MAC addresses. After the router page is bound, the computer writes a command binding, which is a double binding to ARP attacks (as long as your network card is assigned a fixed IP, they will not change).