OCR J277/01 – 1.3 Computer networks

Posted on by Administrator Posted in J277 - Computer Science GCSE (OCR)
1.1 System Architecture - Overview / Checklist
1.3.1 Networks and topologies
Types of network:

    LAN (Local Area Network)
    WAN (Wide Area Network)

Factors that affect the performance of networks
The different roles of computers in a client-server and a peer-topeer network
The hardware needed to connect stand-alone computers into a Local Area Network:

    Wireless access points
    Routers
    Switches
    NIC (Network Interface Controller/Card)
    Transmission media

The Internet as a worldwide collection of computer networks:

    DNS (Domain Name Server)
    Hosting
    The Cloud
    Web servers and clients

Star and Mesh network topologies

1.3.2 Wired and wireless networks, protocols and layers
Modes of connection:

    Wired

      Ethernet

    Wireless

      Wi-Fi
      Bluetooth

Encryption
IP addressing and MAC addressing
Standards
Common protocols including:

    TCP/IP (Transmission Control Protocol/Internet Protocol)
    HTTP (Hyper Text Transfer Protocol)
    HTTPS (Hyper Text Transfer Protocol Secure)
    FTP (File Transfer Protocol)
    POP (Post Office Protocol)
    IMAP (Internet Message Access Protocol)
    SMTP (Simple Mail Transfer Protocol)

The concept of layers

Recommended Resources

1.3.1 Networks and topologies

Network Design

Network Design Tasks

Office Network Design Task

The Retro Gaming Internet Café


1.3.2 Wired and wireless networks, protocols and layers

Wired & Wireless Connection Methods

Daily Protocolometer

TCP/IP Protocols and Packet Switching

TCP/IP Stack: Network Layers and Protocols

IP Addresses (IPv4, IPv6), MAC Addresses & URLs


Further Reading…

Extra Resources
Network Design – Drag and Drop Computer Networks – Quiz Computer Networks – Terminology Computer Networks – Crossword Network Design – Quiz Computer Networks – Acronyms Computer Networks – Noughts and Crosses The Mesh Network Puzzle

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