ITL351 Computer Network Simulator

Semester project — full protocol stack simulator (C++).

Project structure

Computer-Network-Simulator/
├── main.cpp
├── build.bat
├── SPECIFICATION.md
├── devices/       Device, EndDevice, Hub, Switch, Bridge, Router
├── network/       Frame, Channel, CRC, IPv4, ARP, RoutingTable, RoutingProtocols
├── transport/     Ports, TCP/UDP segments
├── application/   HTTP, DNS
└── simulator/     Tests, domain analysis, full stack send

Build and run (Windows)

cd Computer-Network-Simulator
./build.bat
./network_sim.exe

What runs

main.cpp calls runAllTests() which runs all submission test cases in order:

1. Point-to-point
2. Star topology (5 hosts + hub)
3. Bridge + Switch + CRC
4. DL Test Case 1 (switch + 5 hosts + domains)
5. DL Test Case 2 (2 hubs + switch + 10 hosts + domains)
6. CSMA/CD access control
7. Selective Repeat flow control
8. Network layer (router, ARP, static + RIP/OSPF/BGP/EIGRP)
9. Full stack HTTP (TCP)
10. Full stack DNS (UDP)

Design notes

• Frames carry data at Layer 2; IPv4/ports logged at upper layers.
• ACKs use AckBuffer and deliverACKs() like earlier steps.
• Routing protocols are simplified educational simulations that update the routing table and print logs.

See SPECIFICATION.md for mapping to assignment deliverables.