CCTV:
Closed Circuit Television (CCTV) is a television transmission system in which live or prerecorded signals are sent over a closed loop to a finite and predetermined group of receivers, either via coaxial cable or as scrambled radio waves that are unscrambled at the point of reception.

Access Control:
The control of persons, vehicles and materials through entrances and exits of a protected area; an aspect of security that often utilizes hardware systems and specialized procedures to control and monitor movements into, out of, or within a protected area. Access to various areas may be limited to place or time, or a combination of both.

Intrusion Detection:
Intrusion detection (ID) is a type of Security Management System for computers and networks. An ID system gathers and analyzes information from various areas within a computer or a network to identify possible security breaches, which include both intrusions (attacks from outside the organization) and misuse (attacks from within the organization). ID uses vulnerability assessment (sometimes referred to as scanning), which is a technology developed to assess the security of a computer system or network.
Intrusion detection functions include:

• Monitoring and analyzing both user and system activities
• Analyzing system configurations and vulnerabilities
• Assessing system and file integrity
• Ability to recognize patterns typical of attacks
• Analysis of abnormal activity patterns