OCR GCSE (J277) SLR 1.3 – Computer networks, connections and protocols

It includes:

• Student Learning Record Workbook (for use by students)
• Student Learning Record Answers (for use by teachers)
• End of Topic test and answers
• Lesson PowerPoint’s for every lesson
• Any associated answers or references sheets for class activities

This topic covers:

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