A hard bounce occurs when an email is permanently undeliverable, such as to a nonexistent address. A soft bounce happens when an email reaches the recipient's server but cannot be delivered to their inbox, perhaps due to it being full. Spam is unsolicited junk mail. An intranet is a private network within a firewall that connects organizational computers, whereas the internet connects networks globally.

2. a hard bounce is the failed delivery of an email due to a permanent reason like a non-existent address A soft bounce is an email message that gets as far as the recipient’s mail server but is bounced back undelivered before it gets to the intended recipient. A soft bounce might occur because the recipient’s inbox is full.

3. Spam is junk mail

4. Internet is an electronic communications network that connects computer networks and organizational computer facilities around the world Intranet is a private computer network with a firewall, business.

5. Post Office Protocol Application-layer internet standard protocol used by local email clients to retrieve e-mail from a remote sserver over a TCP/IP connection

6. 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 is the process of transforming information (referred to as plaintext) using an algorithm (called cipher) to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. Decryption can typically also perform decryption), to make the encrypted information readable again

8. set of social conventions that facilitate interaction over networks, ranging from Usenet and mailing lists to blogs and forums It is important because it keeps everything organized on the internet.

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