Computer Network Concepts Quiz

Computer Network Concepts

• A computer network consists of interconnected computers and devices that allow communication and resource sharing.
• Key benefits include reduced hardware costs, sharing of files and applications, electronic mail services, collaborative work on files, and remote troubleshooting assistance.

Types of Computer Networks

• Personal Area Network (PAN):

  • Connects devices within close proximity (meters), such as smartphones and tablets.

• Local Area Network (LAN):

  • Confined to a limited geographic area like a school or office building.
  • Requires a file server to store network control software and shared applications.
  • Connected computers are referred to as workstations.

• Campus Area Network (CAN):

  • Interconnects multiple LANs within a defined campus area, often owned by a university or enterprise.

• Metropolitan Area Network (MAN):

  • A hybrid network connecting multiple LANs within the same city or municipality.

• Wide Area Network (WAN):

  • Covers vast areas, often crossing metropolitan, regional, or national boundaries.
  • Uses dedicated transoceanic cabling or satellite uplinks for connectivity.

Network Materials

• Cables are traditionally used to connect devices, with various types available based on specific needs.
• Common networking cables include coaxial, twisted-pair, and fiber-optic materials, differing in bandwidth, size, and cost.

Common Network Cables

• Twisted Pair Cable:

  • Used for telephone communications and Ethernet networks.
  • Comprises twisted copper wire pairs to minimize crosstalk.
  • Unshielded Twisted Pair (UTP):
    • Contains 2-4 pairs of wires, offering basic noise cancellation.
    • Most commonly used cable type.
  • Shielded Twisted Pair (STP):
    • Each wire pair is wrapped in metallic foil for better shielding.
    • Reduces internal and external electrical noise but is more costly and difficult to install.

• Coaxial Cable:

  • Features a copper core surrounded by a thick shield.
  • Primarily connects computers to a wider network.
  • Requires specific connectors (BNC or Bayonet Neill-Concelman).