Networking

What is DNS? DNS (Domain Name System) is often referred to as the “phonebook of the internet.” It is a hierarchical naming system that translates human-readable domain names (like www.example.com) into machine-readable IP addresses (like 192.0.2.1) and vice versa. This process allows users to access websites and services without needing to remember complex numerical IP…

What is ethical hacking? Ethical hacking, also known as penetration testing or white-hat hacking, refers to the practice of intentionally probing computer systems, networks, or applications for vulnerabilities to identify and fix security flaws. Ethical hackers use the same methods and tools as malicious hackers but do so with the permission and authorization of the…

What does SD-WAN do? SD-WAN stands for Software-Defined Wide Area Network. It is a networking technology that simplifies the management and operation of a wide area network (WAN) by decoupling the network hardware from its control mechanism. An SD-WAN uses software to control and optimize the routing of network traffic over multiple network paths, including…

What is a software-defined perimeter? A software-defined perimeter (SDP) is a security framework that is designed to protect network resources by creating a secure, encrypted, and isolated network environment for authorized users. It is a form of access control that uses a combination of authentication, encryption, and dynamic access policies to provide secure access to…

What is an access point in networking? In networking, an access point (AP) is a device that allows wireless communication devices, such as laptops, smartphones, and tablets, to connect to a wired network. It serves as a central hub for wireless devices to access a Local Area Network (LAN) or a wider network like the…

What is a network repeater? A network repeater is a device used in networking to regenerate or replicate signals that are weakened or distorted over long distances. This basic networking device operates at the physical layer (Layer 1) of the OSI (Open Systems Interconnection) model. Here’s a bit more detail on its function and importance:…

What is a network hub? A network hub is a networking device that connects multiple computers or other network devices together in a Local Area Network (LAN). It operates at the physical layer (Layer 1) of the OSI model, which means it does not manage any of the traffic that comes through it. A hub…

What is a network bridge? A network bridge is a device or software that connects and filters traffic between two or more network segments, creating a single, unified network. It operates at the data link layer (Layer 2) of the OSI model and is used to reduce network congestion and improve performance by managing the…

What is a network gateway? A network gateway is a device that connects two different networks and facilitates communication between them. It acts as a point of entry and exit for data traveling to and from the network it serves. Here are some key functions and characteristics of a network gateway: Protocol Translation: Gateways can…

What is network virtualization? Network virtualization is a method of combining hardware and software network resources and network functionality into a single, software-based administrative entity called a virtual network. It involves the abstraction of network services from the underlying hardware, allowing for the creation of multiple, independent virtual networks that can coexist on the same…

What is a storage area network? A Storage Area Network (SAN) is a high-speed network that provides access to consolidated, block-level data storage. SANs are primarily used to enhance the performance, availability, and scalability of storage resources in enterprise computing environments. Here are the key characteristics and components of a SAN: Architecture: SANs create a…

What a wide area network (WAN)? A Wide Area Network (WAN) is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking. WANs are used to connect multiple smaller networks, such as local area networks (LANs) or metropolitan area networks (MANs), so that computers and users in one…