What is the IP protocol?

The IP protocol (Internet Protocol) is the main protocol of the network layer (Layer 3 in the OSI model) in the TCP/IP protocol stack. It is responsible for addressing and routing data packets in a network, ensuring the delivery of information from sender to receiver across various networks.

Key features of IP:

• Best Effort Delivery: IP attempts to deliver a packet but does not guarantee its receipt, order, or the absence of duplicates. These functions are provided by higher-level protocols, such as TCP.
• Addressing: Uses IP addresses to identify nodes in the network (IPv4 32-bit, IPv6 128-bit).
• Fragmentation: Allows large packets to be broken into smaller ones for transmission over networks with limited MTU (Maximum Transmission Unit). Reassembly occurs at the destination node.
• Routing: IP packets contain destination address information used by routers to determine the best delivery path.
• Connectionless Protocol: IP does not establish a persistent connection between sender and receiver. Each packet is processed independently.

IP is the foundation of the internet and most modern networks.