The Internet Protocol (IP) is the foundational set of rules that governs how data is addressed, routed, and transmitted across computer networks to ensure it reaches the correct destination. Operating at the network layer (Layer 3) of the Open Systems Interconnection (OSI) model, it functions much like a digital postal system by assigning unique addresses to devices and handling data packaging. Core Functions of IP
Addressing: It assigns a unique identifier (an IP address) to every device connected to a network so they can locate each other.
Encapsulation: It breaks large blocks of data into smaller, manageable chunks called packets. Each packet includes a “header” containing metadata like the sender and receiver addresses, and a “payload” containing the actual data.
Routing: Network routers read the destination IP address in the packet header to determine the most efficient path across interconnected networks. Key Characteristics
Connectionless: IP does not establish a dedicated connection or “session” between devices before sending data. Each packet is treated completely independently.
Unreliable / Best-Effort: By design, IP alone does not guarantee that packets will arrive safely, in the correct order, or without duplication. It relies on higher-layer protocols like the Transmission Control Protocol (TCP) to handle error correction and retransmission. What is the Internet Protocol? – Cloudflare
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