{"id":1900,"date":"2023-10-23T13:02:16","date_gmt":"2023-10-23T08:02:16","guid":{"rendered":"https:\/\/afzalbadshah.com\/?p=1900"},"modified":"2025-10-15T12:27:47","modified_gmt":"2025-10-15T07:27:47","slug":"basics-of-internet-protocol-ip","status":"publish","type":"post","link":"https:\/\/afzalbadshah.com\/index.php\/2023\/10\/23\/basics-of-internet-protocol-ip\/","title":{"rendered":"Basics of Internet Protocol (IP) AND IP Addressing"},"content":{"rendered":"\n

The Internet Protocol (IP) is a fundamental set of rules and conventions that define how data is transmitted and routed over the Internet. It is the backbone of modern networking, ensuring that every piece of data finds its correct destination, whether between two computers in a local lab or between continents.<\/p>\n\n\n\n

Visit the detailed course on Computer Networks for more tutorials and visual explanations.<\/a><\/p>\n\n\n\n

Introduction to the Internet Protocol (IP)<\/h2>\n\n\n\n

The Internet Protocol provides the addressing and routing system that connects billions of devices globally. It defines the structure of data packets, how these packets are addressed, and how they move from one device to another. Think of IP as the digital postal system. It adds sender and receiver addresses to every data packet and ensures that each packet reaches the right destination.<\/p>\n\n\n\n

Basics of the Internet Protocol (IP)<\/h2>\n\n\n\n

Here are some essential terminologies and concepts related to IP.<\/p>\n\n\n\n

Addressing<\/h3>\n\n\n\n

IP assigns a unique numerical address to each device connected to the Internet. These are called IP addresses, and they serve as the logical identity of a device.<\/p>\n\n\n\n

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Example IPv4: 192.168.1.1<\/code>
Example IPv6: 2001:0db8:85a3:0000:0000:8a2e:0370:7334<\/code><\/p>\n<\/blockquote>\n\n\n\n

IPv4 uses 32-bit addresses, while IPv6 uses 128-bit addresses to support a vastly larger number of devices.<\/p>\n\n\n\n

Packet Structure<\/h3>\n\n\n\n

Before transmission, data is divided into small packets. Each packet includes the source IP address, the destination IP address, and the actual data (payload). This helps routers and switches determine where to send each packet next.<\/p>\n\n\n\n

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Example of packet components:
| Source: 192.168.1.10 | Destination: 172.217.0.46 | Data: <content> |<\/code><\/p>\n<\/blockquote>\n\n\n\n

Routing<\/h3>\n\n\n\n

Routers read the destination IP address in each packet and use routing tables to decide the best path for forwarding it. Packets may pass through multiple routers before reaching their final destination.<\/p>\n\n\n\n

Version 4 (IPv4)<\/h3>\n\n\n\n

IPv4 has been the standard for decades, offering around 4.3 billion unique addresses. However, due to the massive growth of connected devices, the IPv4 pool is not able to address.<\/p>\n\n\n\n

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Example IPv4 Address: 192.168.0.1<\/code><\/p>\n<\/blockquote>\n\n\n\n

Version 6 (IPv6)<\/h3>\n\n\n\n

IPv6 was introduced to overcome IPv4 limitations. It provides trillions of unique addresses, supports efficient routing, and ensures every IoT device can have a unique identifier.<\/p>\n\n\n\n

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Example IPv6 Address: 2001:0db8:85a3::8a2e:0370:7334<\/code><\/p>\n<\/blockquote>\n\n\n\n

End-to-End Connectivity<\/h3>\n\n\n\n

IP ensures that packets can travel from any source to any destination across multiple networks \u2014 a concept known as end-to-end communication. However, IP does not guarantee reliability; it simply forwards packets.<\/p>\n\n\n\n

Stateless Protocol<\/h3>\n\n\n\n

IP is a stateless protocol. It treats each packet independently. If one packet fails to arrive, IP itself does not retry. Higher-layer protocols like TCP handle reliability and sequencing.<\/p>\n\n\n\n

Internet Governance<\/h3>\n\n\n\n

IP address allocation and management are overseen by:<\/p>\n\n\n\n