hosts file

i accidently delete my hosts file
what is hosts file for??
how do i get a new hosts file?
wothout a hosts file will it affect my computer?

First, telling what OS you use may be usefull... In any case u can edit and setup ur hosts file yourself...

In linux there are the hostnames and IP's of your LAN.

For windows here is a very helpfull link: http://accs-net.com/hosts/ and how it affects your browsing