What is a Spam? Why has it become a big Internet issue?

Q. What is a Spam? Why has it become a big Internet issue?

Answer:-

Spam:- Spamming refers to the sending of bulk-mail by an identified or unidentified source. In non-malicious form, bulk advertising mail is sent to many accounts. In malicious form (e.g., e-mail bombing), the attacker keeps on sending bulk mail until the mail-server runs out of disk space.

• Spam has become the bane of the Internet, and still there is no real solution in sight. Spam is usually defined as "unsolicited e-mail" and resembles the flyers from stores that clog your newspapers each morning, but it's much more than that.