(Networking Notes Main Page) 1.2.1 Host Roles Hosts, Servers, and Clients Hosts All computers that are connected to a network and participate directly in network communication are classified as hosts. Hosts can also be called end devices. Some hosts are also called clients. The term hosts specifically refers to devices on the network that are assigned a number for communication purposes. This number is called the Internet Protocol (IP) address....
(Networking Notes Main Page) Network Representations Network architects and administrators must be able to show what their networks will look like. They need to be able to easily see which components connect to other components, where they will be located, and how they will be connected. Diagrams of networks often use symbols, like those shown in the figure, to represent the different devices and connections that make up a network....
(Networking Notes Main Page) Networks of Many Sizes Now that you are familiar with the components that make up networks and their representations in physical and logical topologies, you are ready to learn about the many different types of networks. Networks come in all sizes. They range from simple networks consisting of two computers, to networks connecting millions of devices. Simple home networks let you share resources, such as printers, documents, pictures, and music, among a few local end devices....
Internet Access Technologies So, now you have a basic understanding of what makes up a network and the different types of networks. But, how do you actually connect users and organizations to the internet? As you may have guessed, there are many different ways to do this. Home users, remote workers, and small offices typically require a connection to an ISP to access the internet. Connection options vary greatly between ISPs and geographical locations....
Network Architecture Have you ever been busy working online, only to have “the internet go down”? As you know by now, the internet did not go down, you just lost your connection to it. It is very frustrating. With so many people in the world relying on network access to work and learn, it is imperative that networks are reliable. In this context, reliability means more than your connection to the internet....
Recent Trends You know a lot about networks now, what they are made of, how they connect us, and what is needed to keep them reliable. But networks, like everything else, continue to change. There are a few trends in networking that you should know about. As new technologies and end-user devices come to market, businesses and consumers must continue to adjust to this ever-changing environment. There are several networking trends that affect organizations and consumers:...
Security Threats You have, no doubt, heard or read news stories about a company network being breached, giving threat actors access to the personal information of thousands of customers. For this reason, network security is always going to be a top priority of administrators. Network security is an integral part of computer networking, regardless of whether the network is in a home with a single connection to the internet or is a corporation with thousands of users....
CCNA The role and skills required of network engineers are evolving and are more vital than ever. The Cisco Certified Network Associate (CCNA) certification demonstrates that you have a knowledge of foundational technologies and ensures you stay relevant with skill sets needed for the adoption of next-generation technologies. A consolidated and updated CCNA for networking engineers is three courses and one exam which covers the fundamental topics for all network technologies....
Why should I take this module? Welcome to Basic Switch and End Device Configuration! As part of your career in networking, you might have to set up a new network or maintain and upgrade an existing one. In either case, you’ll configure switches and end devices so that they are secure and perform effectively based on your requirements. Out of the box, switches and end devices come with some general configuration....
Operating Systems All end devices and network devices require an operating system (OS). As shown in the figure, the portion of the OS that interacts directly with computer hardware is known as the kernel. The portion that interfaces with applications and the user is known as the shell. The user can interact with the shell using a command-line interface (CLI) or a graphical user interface (GUI). Shell - The user interface that allows users to request specific tasks from the computer....