Author Archives: Allen Rodriguez

Remote Authentication Dial-In User Service (RADIUS) provides an authentication, authorization and accounting (AAA) protocol through which a network access server or device can consult a policy service. In modern deployments, a wireless controller, switch, VPN gateway or other authenticator often acts as the RADIUS client, while the user or device seeking access is a different […]

LAN, MAN and WAN describe networks primarily by geographic and organizational scope. A local area network connects devices within a limited location, a metropolitan network commonly links sites across a city, and a wide area network connects locations over greater distances or administrative boundaries. These terms do not intrinsically establish speed, security level, protocol, owner […]

Network ports are among the most fundamental concepts in networking, yet they are also among the most consequential from a security perspective. Every service running on a networked device communicates through a port, and every open port represents a potential entry point for an attacker who knows how to exploit it. For professionals preparing for […]

Route redistribution joins routing domains that were designed to calculate paths independently. A campus using OSPF may acquire a network using EIGRP, a provider handoff may introduce BGP, or a migration may temporarily require connected and static prefixes to enter a dynamic protocol. Redistribution permits reachability across those boundaries, but it does not turn separate […]

In an era where data streams stretch across continents in milliseconds and business continuity depends on the smooth pulse of digital communication, the demand for efficient Wide Area Network (WAN) performance is no longer a luxury—it’s an existential necessity. WANs are the arteries of our interconnected reality, connecting not just networks but lives, economies, and […]

In the intricate tapestry of computer networks, routing protocols serve as the navigational compass, guiding data packets through the labyrinthine pathways of interconnected devices. Among these protocols, the Enhanced Interior Gateway Routing Protocol (EIGRP) stands out as a hybrid routing protocol that amalgamates the strengths of distance-vector and link-state protocols. This article delves into the […]

Every network that connects more than one segment of devices requires a mechanism for determining how data travels from its source to its destination. Routing is the process that makes this possible, and it comes in two primary forms: dynamic routing, where routers automatically discover and share information about available paths, and static routing, where […]

In the fast-paced world of networking, one critical tool that allows administrators to gain transparency into network traffic without disruption is port mirroring. Network traffic, which flows constantly between devices, can sometimes become difficult to manage or troubleshoot. However, by creating exact copies of this traffic and forwarding them to a dedicated port, port mirroring […]

In today’s world of ubiquitous connectivity, wireless networking has become a cornerstone of our digital experience. At the heart of wireless communication, especially within the realms of Wi-Fi networks, lies the Service Set Identifier (SSID). Though often overlooked by everyday users, SSID plays a pivotal role in the seamless and secure operation of wireless networks. […]

A jumbo frame is an Ethernet frame designed to carry a larger-than-usual network-layer payload. In many IP Ethernet environments, a 1,500-byte MTU is the default, while data-center designs may choose an IP MTU near 9,000 bytes where devices and applications support it. The word “jumbo” is not itself a universal 9,000-byte standard, and Ethernet frame […]

In the ever-expanding world of networking, the demand for higher speeds, increased reliability, and scalability is constant. One of the fundamental strategies employed to meet these needs is link aggregation, which combines multiple physical links to create a single logical link, providing higher throughput, redundancy, and enhanced fault tolerance. Among the various methods of link […]

A wireless channel is a defined slice of radio-frequency spectrum that allows devices to send and receive 802.11 frames. Choosing the channel is more than selecting a number in an access-point dashboard: center frequency, channel width, neighboring radios, regulatory permissions, radar detection and available airtime all influence service quality. A channel plan is successful when […]

In the vast world of networking, routing protocols stand as the invisible architects, ensuring the smooth, efficient, and reliable flow of data between devices across intricate systems. Without routing protocols, data packets would be aimlessly adrift, unable to navigate the complex web of interconnected networks. The very foundation of modern networking relies on these protocols, […]

Routing Information Protocol, universally known as RIP, is one of the oldest and most foundational dynamic routing protocols in the history of computer networking. It belongs to a category of routing protocols known as distance-vector protocols, which determine the best path for network traffic based on the number of hops, meaning the number of routers […]

In the rapidly evolving landscape of modern networking, businesses and service providers face an increasing demand for bandwidth and reliability. As the volume of data that traverses networks grows exponentially, the need for high-performance, resilient infrastructure has become paramount. Enter port aggregation—a technique that allows organizations to optimize their network performance by bundling multiple physical […]