Summary

To secure computer networks, we use various tools and strategies. Firewalls act as protective barriers, filtering data in and out. Spam filters and anti-spam software prevent unwanted messages. Anti-spyware and anti-virus programs guard against harmful software. Staff training and policies promote safe practices. reCAPTCHA stops automated threats. Encryption encodes data to prevent unauthorised access. Vulnerabilities are weak points that hackers target, so we use penetration testing to find them. Physical security ensures network equipment is safe. Strong passwords and user access levels limit unauthorised entry.