Why networks need security measures

Networks face various threats that can compromise data and system security. Without proper protection, sensitive information can be stolen, systems can be damaged, and unauthorised users can gain access to restricted areas.

Common network threats include:

• Malware - Viruses, worms, and other malicious software that can damage systems
• Hackers - Unauthorised users attempting to gain access to networks
• Data theft - Stealing personal or confidential information
• Denial of service attacks - Overwhelming networks to make them unusable

How encryption protects data

Encryption is a method of converting readable data into a coded form. This process ensures that only someone with the correct key can access the original information.

Key concepts in encryption

• Plain text - The original, readable form of data
• Cipher text - The encoded version of the data
• Encryption key - The key needed to decode the cipher text

If someone intercepts the data without the key, they cannot understand or use it.

The role of firewalls in network protection

A firewall is a security system that monitors and controls network traffic.

How firewalls work

• Firewalls inspect all data entering or leaving the network
• They block any potential threats
• This helps prevent unauthorised access to the network

Features and functions of anti-malware software

Anti-malware software is a program designed to find and stop malware from damaging devices or networks.

Key features of anti-malware software

• Scanning - Checks files or emails for malware
• Repair and removal - Fixes infected files
• Real-time protection - Continuously monitors for threats
• Automatic updates - Keeps virus definitions current to detect new threats

The importance of passwords for secure access

Passwords help prevent unauthorised users from accessing a network or account.

Creating strong passwords

• Use a mix of uppercase and lowercase letters, numbers, and symbols
• Avoid common words or easily guessed personal information
• Make them many characters long

Strong passwords help keep personal information secure. Users should also change passwords regularly and avoid reusing them across different sites.