1.3
Computer Networks
Network types, protocols, and security
LAN: Local Area Network, small area, organisation-owned
WAN: Wide Area Network, large area, uses third-party links
Star topology: Central switch/hub, one failure doesn't affect others
Protocols: TCP/IP, HTTP, HTTPS, FTP, SMTP, IMAP
Packet switching: Data split into packets with headers
MAC address: Hardware identifier, IP address: Network identifier
Exam Tips
- •Always define key terms before explaining concepts
- •Use specific examples where possible to demonstrate understanding
- •Check mark allocation - one point per mark is a good guide