Back to Computer Networks
Introduction to Networking
Network fundamentals, architecture, and performance metrics
Key Concepts
Network types, topologies, protocol models, performance metrics
Applications
Network design, protocol analysis, performance evaluation
Exam Focus
OSI vs TCP/IP, network calculations, topology comparison
Topics Overview
Network Architecture Details
Network Types
| Network Type | Range | Examples | Characteristics |
|---|---|---|---|
| LAN (Local Area Network) | Up to 1 km | Office, Home networks | High speed, low cost, private ownership |
| MAN (Metropolitan Area Network) | Up to 100 km | City-wide networks, Cable TV | Medium speed, moderate cost, may be public/private |
| WAN (Wide Area Network) | Country/Continent | Internet, Corporate networks | Lower speed, high cost, often public |
Network Topologies
Bus Topology
All nodes connected to a single cable
Advantages: Simple, cost-effective
Disadvantages: Single point of failure, collision domain
Star Topology
All nodes connected to central hub/switch
Advantages: Easy troubleshooting, no collision
Disadvantages: Central point failure, more cable required
Ring Topology
Nodes connected in circular fashion
Advantages: No collision, equal access
Disadvantages: Difficult troubleshooting, node failure affects network
Mesh Topology
Every node connected to every other node
Advantages: Highly fault tolerant, multiple paths
Disadvantages: Expensive, complex wiring
📝 Exam Preparation Tips
Key Topics to Remember
- • Memorize all 7 OSI layers and their functions
- • Compare OSI vs TCP/IP models
- • Understand network topology advantages/disadvantages
- • Practice bandwidth and latency calculations
- • Know network types and their characteristics
Common Exam Questions
- • "Compare OSI and TCP/IP models" (5 marks)
- • "Calculate transmission time for given data" (3 marks)
- • "Draw and explain star topology" (4 marks)
- • "Differentiate between LAN, MAN, and WAN" (6 marks)
- • "Explain functions of each OSI layer" (7 marks)