Computer Network Essentials: Tips, Tutorials, and Best Practices

OSPF In Computer Networks: Is OSPF A Data Link Layer Protocol?

Date: 31st August 2026, Monday | Editor: Techk's Team

Introduction to OSPF OSPF, or Open Shortest Path First, is one of the most important routing protocols used in modern computer networks. However, an important clarification is necessary at the beginning: OSPF does not operate at the Data Link Layer. OSPF is primarily a Network Layer (Layer 3)....

What Is Multicast Listener Discovery (MLD)? Complete Guide To MLD In IPv6 Networks

Date: 29th August 2026, Saturday | Editor: Techk's Team

Introduction to Multicast Listener Discovery (MLD) Multicast Listener Discovery (MLD) is an important protocol used in IPv6 networks to manage multicast group membership. It allows IPv6 hosts and routers to communicate about which multicast groups are being listened to by devices on a network. MLD....

What Is IGMP? Can IGMP Create Security Risks For A Network?

Date: 29th August 2026, Saturday | Editor: Techk's Team

Introduction to IGMP Internet Group Management Protocol (IGMP) is a network-layer communication protocol used primarily in IPv4 networks to manage multicast group membership. Multicast allows a single source to transmit data to multiple receivers simultaneously without sending an individual copy....

ICMP: Definition, Working, Uses, Applications, Types, And Importance

Date: 29th August 2026, Saturday | Editor: Techk's Team

Introduction to ICMP ICMP (Internet Control Message Protocol) is an important protocol used in IP-based computer networks for sending control, diagnostic, error-reporting, and status messages. ICMP works closely with the Internet Protocol (IP) and is commonly associated with the Network Layer....

Network Layer: Definition, Objectives, Functions, Protocols, And Importance

Date: 29th August 2026, Saturday | Editor: Techk's Team

Introduction to the Network Layer The Network Layer is the third layer of the OSI (Open Systems Interconnection) model and plays a fundamental role in computer networking. It is positioned above the Data Link Layer and below the Transport Layer. The primary responsibility of the Network Layer is....

HDLC In Data Link Layer: Definition, Features, Frame Format, Types, Working, And Applications

Date: 28th August 2026, Friday | Editor: Techk's Team

1. Introduction to HDLC in the Data Link Layer High-Level Data Link Control (HDLC) is a bit-oriented data link layer protocol used for reliable communication between two or more network devices over a data communication link. HDLC operates at Layer 2 of the OSI model, also known as the Data Link....

WiFi(802.11) In Data Link Layer - Introduction

Date: 28th August 2026, Friday | Editor: Techk's Team

The IEEE 802.11 standard defines the specifications for Wireless Local Area Networks (WLANs), operating primarily across the physical layer and the Data Link Layer of the Open Systems Interconnection (OSI) model. Within the Data Link Layer, 802.11 is tasked with converting raw physical signals....

Main Objectives And Goals Of The Physical Layer In Computer Networks

Date: 27th August 2026, Thursday | Editor: Techk's Team

Introduction The Physical Layer is the first and lowest layer of the Open Systems Interconnection (OSI) model and provides the fundamental foundation for communication between network devices. Its primary responsibility is to transmit raw bits—zeros and ones—over a physical....

What Is The Data Link Layer? Complete Guide To Layer 2 Of The OSI Model

Date: 26th August 2026, Wednesday | Editor: Techk's Team

1. Introduction to the Data Link Layer The Data Link Layer is the second layer of the OSI (Open Systems Interconnection) model and plays a fundamental role in computer networking. Positioned between the Physical Layer and the Network Layer, it is responsible for providing reliable communication....

10/100/1000BASE-T In The Physical Layer: Complete Guide To Fast Ethernet And Gigabit Ethernet

Date: 26th August 2026, Wednesday | Editor: Techk's Team

Introduction 10/100/1000BASE-T is one of the most widely used Ethernet technologies for connecting computers, servers, switches, routers, access points, IP cameras, printers, and other network devices over copper twisted-pair cables. It is commonly associated with Ethernet physical-layer....

Hubs In The Physical Layer: Definition, Architecture, Working, Types, Advantages, Limitations, And Applications

Date: 25th August 2026, Tuesday | Editor: Techk's Team

1. Introduction A hub is a basic networking device that operates primarily at Layer 1, the Physical Layer, of the OSI (Open Systems Interconnection) model. It is used to connect multiple computers, network devices, or communication nodes within a local area network (LAN). Unlike intelligent....

DSL (Digital Subscriber Line) In The Physical Layer

Date: 21st August 2026, Friday | Editor: Techk's Team

Introduction Digital Subscriber Line (DSL) is a family of broadband communication technologies designed to provide high-speed digital data transmission over the existing copper twisted-pair telephone infrastructure. DSL operates primarily at the Physical Layer (Layer 1) of the OSI reference model....

Physical Layer: RS-232 | RS-232 And The OSI Physical Layer | RS-232 And The Physical Layer

Date: 18th August 2026, Tuesday | Editor: Techk's Team

1. Introduction RS-232 is one of the most historically important standards for serial communication between computers, terminals, modems, and other electronic devices. It defines the electrical, functional, and mechanical characteristics required for exchanging serial binary data between two....

Physical Layer: Ethernet | Ethernet Physical Layer And Modern Networking

Date: 18th August 2026, Tuesday | Editor: Techk's Team

1. Introduction Ethernet is one of the most widely deployed technologies for computer networking and forms a fundamental part of modern Local Area Networks (LANs). Although Ethernet is commonly discussed as a Data Link Layer technology, its operation extends into the Physical Layer, where it....

HTTPS: Definition, Architecture, Working, Security, And Advanced Concepts

Date: 17th August 2026, Monday | Editor: Techk's Team

1. Introduction HTTPS, or Hypertext Transfer Protocol Secure, is the secure version of HTTP used for communication between web browsers, mobile applications, APIs, and web servers. It protects data exchanged over a network by combining HTTP with TLS (Transport Layer Security). HTTPS is fundamental....

Cryptographically Secured Communication Framework Based On TLS And PKI

Date: 17th August 2026, Monday | Editor: Techk's Team

Introduction A cryptographically secured communication framework based on Transport Layer Security (TLS) and Public Key Infrastructure (PKI) is a fundamental component of modern network and cybersecurity architecture. It provides a systematic mechanism for establishing trust between communicating....

What Is Peer-to-Peer (P2P) Protocol? Types Of Peer-to-Peer Protocol?

Date: 20th July 2025, Sunday | Editor: Techk's Team

A Peer-to-Peer (P2P) protocol is a communication model where each participant (called a peer) acts both as a client and a server. This means that every node can initiate or complete data exchanges, without relying on a centralized server. Key Characteristics: Decentralization: No central....

OSI Reference Model - Define Open Systems Interconnection Model (MCQ)

Date: 9th July 2025, Wednesday | Editor: Techk's Team

What is OSI Model? The OSI Model (Open Systems Interconnection Model) is a conceptual framework that explains how data travels from one computer to another in a network. It divides the process of communication between two devices into 7 different layers, where each layer has a specific....

Briefly Explain What Is Meant By Protocol And Protocol Architecture?

Date: 4th October 2021, Monday | Editor: KT Team

Protocol is a software that resides either in a computer’s memory or in the memory of a transmission device, like a network interface card. When data is ready for transmission, this software is executed. The software prepares data for transmission and sets the transmission in motion. At the....

What Is An IP Address | Internet Protocol

Date: 28th September 2021, Tuesday | Editor: KT Team

IP stance for Internet Protocol is a build single logical network from multiple physical networks. In other words, IP exist in network layer shields the higher levels from the typical network architecture below it. Thus, Internet Protocol (IP) is the most significant protocol. The higher layers see....