Protocols working at different layers in TCP/IP Model are parts of TCP/IP stack
**TCP protocol works at transport layer and IP protocol works at network layer
1. Transport Layer
- TCP: Transmission Control Protocol
- UDP: User Datagram Protocol
| TCP | UDP |
|---|---|
| Connection Oriented(establishes connection and sends data packets) | Not Connection Oriented(sends data packets without any connection) |
| Reliable | Not Reliable |
| Slow and Heavy | Fast and Lightweight |
2. Network Layer
- DHCP: Dynamic Host Configuration Protocol(allots IP addresses to devices)
- IP: Internet Protocol(Responsible for routing of data packets)
Other protocols working at Network Layer
- ARP: Address Resolution Protocol(For mapping the IP anndress to MAC address)
- ICMP: Internet Control Message Protocol(For debugging network stability & deliverability)