2.1 - Physical Security

Bollards and Barricades
- Definition: Steel or concrete barriers designed to restrict vehicle access in specific areas.
- Functionality:
- Prevent large vehicles from entering pedestrian zones.
- Channel pedestrian movement through designated points.
- Enhance safety by separating vehicle routes from pedestrian areas.
- Variants based on environment:
- Large concrete round barriers.
- Natural barriers like canals or moats in water-rich environments.

Access Control Vestibules
- Definition: Intermediate security zone between external environment and secure internal areas (e.g., data centers).
- Types of vestibules:
- Unlocked doors: When one door is opened, all others lock.
- Locked doors: Only one door can be unlocked at a time; others remain locked until the first door is closed.
- Bi-directional access: Two doors with one-way unlocking features.
- Purpose: Track and manage individuals entering and exiting protected spaces.
- Security Personnel: Typically a receptionist or guard, checking IDs and access credentials.

Modern Access Systems
- Shift from physical keys to electronic processes, utilizing access cards.
- Card Technology:
- Use of RFID (Radio-Frequency Identification) or NFC (Near Field Communication) for access.
- Older systems may still use magnetic stripe readers.
- Functions of access cards:
- Gain entry to secure areas.
- Log clock-in and clock-out times.
- Facilitate security checks conducted by security personnel.

Internal View of Access Cards:
- Typical structure includes:
- An RFID chip located central within the card, attached to an antenna.

CCTV (Closed Circuit Television)
- Growing adoption in organizations for monitoring.
- Functionality:
- Allows remote observation of various facility locations without physical presence.
- Advanced features include:
  - Identification of vehicles.
  - Reading license plates.
  - Motion detection using radio reflection or infrared technology.
- Centralized Monitoring:
- Video feeds are networked to a central station for broader oversight.
- Alerts triggered by detected motion or door/window activity.

Alert Mechanisms
- Circuit-based alerts: Signals when doors or windows open/close, sending notifications to security personnel.
- Motion detection sensors: Automatically notify when changes in the environment occur.
- Duress buttons: Allow individuals to discreetly trigger alarms in unsafe situations.

Types of Locks Used:
- Conventional Lock and Key:
- The most common for home security, often paired with a deadbolt for added protection.
- Electronic Locks:
- Require PIN input for access.
- Token-based Locks:
- Use RFID chips embedded in badges for entry.
- Biometric Systems:
- Utilize physical characteristics (fingerprints, retina scans) for access verification.
- Multi-factor authentication may be implemented in high-security areas.

Cabinet and Rack Security
- Importance of locking cabinets and server racks to limit access to authorized personnel only.
- Structural configuration:
- Racks arranged side-by-side to minimize unauthorized access.
- Access provided through locked front and back doors, maintaining airflow via perforated or vented doors.

Role of Security Guards
- Often stationed at reception or patrolling premises.
- Responsibilities:
- Verify identification and grant or deny access.
- Ensure proper badge identification for employees, often worn on lanyards.
- Visitor Management:
- May require pre-registration for access approval, enhancing security measures with logs of visits.

Fencing Types:
- Purpose: Acts as a primary barrier to unauthorized access to buildings.
- Material and Design:
- Typically heavy metal, designed largely resistant to breaches.
- Heightened fences to deter climbing, often topped with razor wire in high-risk scenarios.