Final answer:
An intrusion in computers and technology refers to unauthorized access or attack on a system. Intrusion defenses include strong passwords, software updates, firewalls, and intrusion detection systems.
Step-by-step explanation:
Intrusion Definition: In the context of computers and technology, an intrusion refers to an unauthorized access or attack on a computer system or network. It involves an individual or program gaining access to computer resources without permission. Intrusions can cause data breaches, system compromise, or other security vulnerabilities.
Intrusion Defense: To defend against intrusions, several measures can be taken. These include implementing strong passwords and authentication methods, regularly updating software and security patches, using firewalls and antivirus software, and conducting regular security audits. Intrusion detection systems (IDS) and intrusion prevention systems (IPS) can also be used to monitor and block potential intrusions.