network security

network security

1. firewall

   • A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.

2. Anti-virus

   • An anti-virus sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software. Antivirus software was originally developed to detect and remove computer viruses, hence the name.

3. password

   • A password is a string of characters used for authenticating a user on a computer system.While usernames are generally public information, passwords are private to each user. Most passwords are comprised of several characters, which can typically include letters, numbers, and most symbols, but not spaces.

4. Encryption

   • The translation of data into a secret code. Encryption is the most effective way to achieve data security. To read an encrypted file, you must have access to a secret key or password that enables you to decrypt it. Unencrypted data is called plain text encrypted data is referred to as cipher text.

5. what is a firewall?

6. what is a Encryption?

7. what is a password?

8. what is a Anit-virus?

9. Lan: local area network

   • wan:wide area network
     • wpan:a wireless persernal netwowork