Networking

The concept of a subnet mask was introduced in the evolution of TCP/IP protocols around 1985. The early internet used a classful addressing system (A, B, C classes), which was proving to be too rigid, and inefficient for IP address allocation. Subnet masks came into the picture to address this issue. History and Need for Subnet Masks In the early days of the internet, the class of an IP address was determined by looking at just the first octet (byte) of the address: ...

Introduction SSH (Secure Shell) is a network protocol that allows you to log in to another computer over a network and execute commands on a remote system or transfer files. In this article, we will go through the step-by-step process of installing an SSH server on an Ubuntu system, configuring it to start automatically, and connecting to the SSH server. Installing the SSH Server First, open a terminal and update the list of packages: ...

Introduction In this article, we will discuss how to configure a static IP on Ubuntu 24.04 LTS. Static IP addresses are helpful for streamlining network management and ensuring reliable connections to your servers. We will cover the steps for configuring an IP address using netplan. Additionally, we will discuss the TUI (nmtui) and CLI (nmcli) methods for setting up a static IP address using NetworkManager. Benefits of a Static IP Consistency: Static IP addresses ensure stability by always using the same IP for network configurations. Remote Access: They simplify connecting to your server externally since the IP address remains consistent. Hosting Services: Static IPs are crucial for running services such as web servers and mail servers. Firewall Configuration: IP-based firewall rules are easier to manage with static IPs. Network Troubleshooting: Static IPs simplify diagnosing and resolving network issues. Methods 1. Configure a Static IP Using netplan (CLI) Open the Network Configuration File Ubuntu 24.04 LTS uses netplan to manage network configurations. Open a terminal window and run the following command to open your network configuration file: ...

Introduction In today’s digital landscape, network switches serve as the backbone of modern networking infrastructure. These devices play a crucial role in efficiently managing and directing network traffic. While they primarily operate at the data link layer of the OSI (Open Systems Interconnection) model, different types of switches have evolved to handle various networking needs. Let’s dive into the world of network switches, exploring their types, unique characteristics, and what you should consider when choosing one for your network. ...