The email it sent claimed to be from your system administrator. It would tell you that your email account had been infected by a virus and that you should open the attached file to get instructions. Once you opened the attached file, your system was infected. What is this?

What is IPv4 length?

Amplifier repeaters simply boost …

A … is basically an intelligent hub; it works and looks exactly like a hub, with one significant difference. When a … receives a packet, it will send that packet only out the port for the computer to which it needs to go. A … essentially a hub that is able to determine where a packet is being sent.

Ask several people to open their browsers and key the IP address of that machine in the address........... They should then be viewing the default website for that web server.

… is fast becoming as big a problem, even bigger than viruses.

What can you do with a firewall to help protect against virus attacks?