Supporting activity: network security i

3   A firewall is  generally set up to protect a particular network or network component from attack, or unauthorized penetration, by outside invaders. However, a firewall also may be set up to protect vital corporate or institutional data or resources from internal attacks.

4  Maintaining your network secured is imperative, one of the first things that any network admin should do after the network is in place is to change the password for the standard admin account, I also change the name of the local admin to something else and then share it only with the few people that have domain admin rights on the network.