Category: Network Protocols

The adoption of IPv6 has introduced a number of enhancements over its predecessor, IPv4, including a larger address space, simplified header format, and improved support for mobility and extensibility. One of the core features distinguishing IPv6 from IPv4 is the use of extension headers. These optional headers allow IPv6 to support new features and services…

As IPv6 adoption continues to grow, the need for flexible and scalable address assignment mechanisms becomes increasingly important, particularly in environments where multiple subnets or downstream routers must be supported. In home and small office networks, where users may employ consumer-grade routers, access points, and IoT devices across different segments, a mechanism that allows automated…

The OSI (Open Systems Interconnection) model, developed by the International Organization for Standardization (ISO) in the late 1970s and published in 1984, was envisioned as a universal set of guidelines to foster interoperability between different communication systems. At a time when networking was fragmented, with proprietary technologies and vendor-specific protocols dominating the landscape, the OSI…

At the core of nearly all reliable internet communication lies the Transmission Control Protocol, or TCP. Designed in the 1970s and formalized in RFC 793 in 1981, TCP was engineered to ensure accurate, ordered, and complete delivery of data across networks. One of the most essential mechanisms that enables TCP to fulfill this role is…

The Hypertext Transfer Protocol, or HTTP, is the cornerstone of web communication, defining how messages are formatted and transmitted between clients and servers. Since its inception in the early 1990s, HTTP has undergone several major revisions aimed at improving performance, reliability, and scalability. HTTP/1.1, introduced in 1997, was the workhorse of the early web and…

In the modern internet landscape, speed and reliability are critical metrics for user experience, especially when delivering rich content at scale. Content Delivery Networks, or CDNs, have become essential infrastructure for achieving low latency and high availability by distributing content geographically closer to end users. One of the foundational techniques enabling this optimization is Anycast…

Segment Routing has emerged as a transformative approach to traffic engineering and network programmability in modern Wide Area Network (WAN) architectures. Designed to address the complexity and limitations of traditional MPLS and IP-based routing mechanisms, Segment Routing introduces a more scalable and simplified way to control packet forwarding paths through the network. By encoding the…

In Ethernet-based networks, especially in enterprise and campus environments, preventing broadcast storms and Layer-2 loops is a fundamental design requirement. Layer-2 domains are susceptible to loops because of the nature of Ethernet’s broadcast and unknown unicast behavior, combined with its lack of a built-in loop prevention mechanism. To address this, Spanning Tree Protocol (STP) was…

In the evolving landscape of web communication, enabling real-time or near-real-time interactions between clients and servers has become essential. Traditional request-response patterns offered by HTTP/1.1 are inherently unidirectional, where the client initiates a request and the server responds. However, modern applications such as chat systems, stock tickers, multiplayer games, and collaborative platforms demand low-latency, bidirectional,…

As the global internet steadily migrates from IPv4 to IPv6, many foundational protocols that underpinned IPv4 networking are being reevaluated, reengineered, or entirely replaced to accommodate the scale, complexity, and performance needs of modern networks. One such protocol is the Address Resolution Protocol (ARP), which has served for decades as the mechanism for resolving IP…