topologies of computer network
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Computer Network Topology Outline
The first thing that has to study about a network is its physical shape or design layout. It will be extremely important when a wiring scheme and design are selected for a new network installation. Actually Network Topology refers to physical shape or design layout of a network. Network topology determines how different nodes in a network are connected and how these nodes communicate to each other. Types of Computer Network Topology Network really has two shapes or two types of topology. Physical topology Logical topology Physical Topologies The physical topology is the physical shape or layout of the wires that can be visible in a network. The Physical topology defines how devices are interconnected with or without wires. Physical topology is further divided into two sections. Point-to-point connections Multipoint connections Point-to-point connections In a point-to-point connection, a communication link is established between two devices with one wire or air (in the case of wireless). A simple example of point-to- point connection is talking over telephone between two persons where anyone else is not allowed to use the phone on either side. Multipoint Connection Multiple devices or machines are involved in a multipoint connection. These devices mainly share cabling but [...]
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MikroTik RADIUS Server (User Manager) Installation | October 28, 2017
RADIUS Server is a centralized user authentication, authorization and accounting application. RADIUS authentication gives the ISP or network administrator ability to manage PPP users, login users and Hotspot users from one server throughout a large network. MikroTik RouterOS has a RADIUS client that is able to authenticate login users, Hotspot users and PPP users through a RADIUS server. MikroTik team also developed a totally separate RADIUS server package named User Manager that can be used to authenticate MikroTik users smoothly. [...]
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Linux Text Editor | September 7, 2017
Everything is file in Linux operating system. So, anyone who wants to work with Linux operating system (specially, Red Hat or CentOS) must learn how to edit files in Linux operating system. Because, it is always prefer to avoid graphical user interface (GUI) for changing system configuration parameters in Linux operating system unlike Windows operating system. You should be expert enough to edit any file in Red hat Linux operating system otherwise you will face a lot of difficulty to [...]
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Ubuntu Server 20.04 Installation with LVM | May 28, 2021
Linux is a free and open source operating system developed by Linus Torvalds on September 17, 1991. It is mainly used as server environment. A lot of Linux distributions are present today. Among them, Ubuntu is one of the best stable Linux distributions. Ubuntu has both Desktop and Server distribution. Ubuntu Server is a high performance and stable enterprise Linux distribution and it can be easily used in production. Ubuntu Server has both community-support and well documentation. So, IT guys can use Ubuntu [...]
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MikroTik Hotspot Configuration in RouterOS 7 | April 25, 2023
MikroTik Hotspot is an awesome service to run a captive portal network. You can run a public Wi-Fi network, Hotel Network, Airport network, CAMP Wi-Fi network, Shopping Mall Network and so on using MikroTik Hotspot and even can monetize your network for earning if you use Hotspot Billing Software like GalaxyRAD which is specially designed for MikroTik Hotspot network. GalaxyRAD helps to monetize your any network providing online payment gateway as well as integrating voucher-based system. It also helps to [...]
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MikroTik Radius Configuration with FreeRADIUS | December 7, 2018
FreeRADIUS is a high performance RADIUS suite that provides authentication, authorization and accounting facility for a large number of network devices including MikroTik Router. Although MikroTik has user manager RADIUS service to provide authentication, authorization and accounting facility but it is not free for customization and not suitable for medium to large organization. On the other hand, freeRADIUS is free for customization according to your organization requirements. But freeRADIUS has to be customized by you. In my previous article, I [...]
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MikroTik Block Website (Facebook, YouTube and Other Sites) | October 12, 2017
MikroTik Firewall is a powerful security tool that can be used to block unwanted websites. If you are a network administrator, sometimes it may be your requirement to block any website like Facebook, YouTube, Pornographic site and so on. To block these types of websites, you just need to create Firewall Rules that will drop any connection to these websites through your MikroTik Router. MikroTik Firewall basic concept such as what is MikroTik Firewall, what is MikroTik Firewall Rule, how [...]
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MikroTik VRRP Configuration with Load Sharing | November 19, 2018
MikroTik VRRP (Virtual Router Redundancy Protocol) ensures high availability internet network. If any organization requires uninterrupted internet connection, MikroTik VRRP implementation will be a vital solution for them. MikroTik VRRP creates a virtual router accumulating two or more physical routers and ensures uninterrupted internet connection keeping activate one physical router always. That means, if any physical router fails to operate due to any hardware failure, MikroTik VRRP uses another backup router for internet gateway until the running router comes back [...]
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Reset Mozilla Firefox to Default Settings | August 26, 2015
Mozilla Firefox is a free and open source web browser developed Mozilla Corporation. Mozilla Firefox is available for most of the popular operating system like Windows, macOS and Linux operating system. It is also a default web browser in Linux operating system. Mozilla Firefox is a popular web browser to any online user. It is said that no online user can go a single day without this Browser. I am also a fan of Mozilla Firefox browser and using this [...]
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CentOS 8 Networking Configuration Using nmtui Tool | December 14, 2020
The first task after completing CentOS 8 fresh installation is to configure its networking so that it can be accessed from other network devices. In my previous article, I discussed how to install CentOS 8 Graphical User Interface (GNOME Desktop) with step by step screenshots. If you are a new CentOS 8 user and have not yet installed CentOS 8 on your server machine, feel free to follow that article and install CentOS 8 GNOME Desktop according to the article. [...]
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