What is IPv4 length?

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?

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

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.

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

By now you are aware, in a general way, of the dangers of the Internet, and you have ........a few basic rules for protection on the Internet.

When was the birth of Usenet newsgroups?