Network security

What is authentication?

It is checking that the computer and the user are allowed to access the content.

What is the most common method of authentication?

It is by using a username and a password.

What is encryption(authentication)?

It is the encoding of data so that it can no longer be easily understood. It won’t prevent prevent hacking, but it makes a data unreadable unless the recipient has a necessary description tools.

What is plaintext?

The original message to be encrypted.

What is ciphertext?

It is the encrypted message.

What is encryption?

The process of converting ciphertext into plaintext.

What is a key?

A sequence of numbers used to encrypt or decrypt often using a mathematical formula.

What is encryption algorithm?

It is the method for encrypting plain text.

What is a firewall?

A network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. The network layer or packet filters stop suspicious packets passing through and the application layer firewall inspect packets and reject those with improper content.

What is MAC address filtering?

Every device has a unique MAC address, so a wireless router can be configured to block access to specific devices identified by their MAC addresses.