Write notes on the following: AUDIT TRAILS, Network access control (NAC), Resources or physical components of LAN

Okay, I see you're working through the "Write notes on the following" section. I've already covered AUDIT TRAILS. Let's continue with the other two points.

Network access control (NAC)

Network Access Control (NAC) is a computer networking solution that restricts the availability of network resources to endpoints that comply with a defined security policy. It authenticates users and devices before granting them access to the network.

Key functions of NAC include:

• Authentication: Verifying the identity of users and devices.
• Authorization: Determining what network resources authenticated entities can access.
• Assessment: Checking devices for compliance with security policies (e.g., up-to-date antivirus, operating system patches).

Resources or physical components of LAN

A Local Area Network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus, or office building.

The main physical components (resources) of a LAN include:

• Computers/Workstations: End-user devices that connect to the network.
• Servers: Centralized computers that provide services (e.g., file storage, printing, web hosting) to other devices on the network.
• Networking Devices:
  • Routers: Connect different networks and direct data packets between them.
  • Switches: Connect devices within a LAN, forwarding data only to the intended recipient.
  • Hubs: (Older technology) Connect multiple devices but broadcast data to all connected devices.
  • Wireless Access Points (WAPs): Allow wireless devices to connect to the wired network.
• Cabling: Physical media like Ethernet cables (e.g., Cat5e, Cat6) used to connect devices.
• Network Interface Cards (NICs): Hardware components in each device that allow it to connect to the network.