Arpanet

1. The ARPANET ( Advanced Research Projects Agency Network ) developed by ARPA of the United States Department of Defense during the Cold War , was the world's first operational packet switching network, and the predecessor of the global Internet James Hartsfield 2 nd

2. Hard & Soft Bounce A soft bounce is an email message that gets as far as the recipient's mail server (it recognizes the address) but is bounced back undelivered before it gets to the intended recipient. A hard bounce is an email message that has been returned to the sender and is permanently undeliverable.

3. Computer Spam Electronic junk mail or junk newsgroup postings.

4. Internet & Intranet The Internet is an open public space An Intranet is designed to be a private space

5. POP In computing, the Post Office Protocol version 3 ( POP3 ) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection.

6. Phishing In the field of computer security, phishing is the criminally fraudulent process of attempting to acquire sensitive information such as usernames, passwords and credit card details by masquerading as a trustworthy entity in an electronic communication.

7. Encryption & Decryption In cryptography, encryption is the process of transforming information as using an algorithm to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. The process of decoding data that has been encrypted into a secret format. Decryption requires a secret key or password.

8. Netiquette Netiquette , a portmanteau of " network etiquette ", is a set of social conventions that facilitate interaction over networks, ranging from Usenet and mailing lists to blogs and forums .

9. Router A router is a networking device whose software and hardware are usually tailored to the tasks of routing and forwarding information.