Another new type of virus has been gaining popularity in the past few years, and that is the “… virus” or, put simply, a hoax. Rather than actually writing a virus, a hacker sends an email to every address he has. The email claims to be from some well-known antivirus center and warns of a new virus that is circulating. The email instructs people to delete some file from their computer to get rid of the virus. The file, however, is not really a virus but part of a computer’s system.

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 …

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.

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.

In net user script, the attacker writes the following two-line script (obviously the word localaccountname is replaced with an actual local account name.):

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