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3.57 balun: In networking, a passive device with distributed electrical constants used to couple a bal anced system or device to an unbalanced system or device. For example, a transformer used to connect balanced twisted-pair cables to unbalanced coaxial. Std 610.7-1995. cables.
What is a Network? • A network refers to two or more connected computers that can share resources such as data, a printer, an Internet connection, applications, or a combination of these resources.
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Layer 3, the network layer of the OSI model, provides an end-to-end logical addressing system so that a packet of data can be routed across several layer 2 networks (Ethernet,Token Ring, Frame Relay, etc.).
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The Five Key Aspects Of Networking d Data communications: signals over wires and bits over signals d Networks: packets over bits d Internets: datagrams over packets d Network programming: application data over the Internet d Cross-functional concepts and technologies: network configuration, control, and management
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- Network Types
- The Local Area Network
- The Wide Area Network
- LAN 1
- LAN 2
- The Metropolitan Area Network
- The Campus Area Network
- Network Topologies
- Troubleshooting the Bus Topology
- The Star Topology
- Layer 1 – The Physical Layer
- Layer 6 – The Presentation Layer
- OSI Model Memorization Tip
- Viewing Device Address Information on a Computer
- Summary
- Chapter Essentials
Personal computer networking technology has evolved at a tremendous pace over the past couple of decades, and many people across the world now have some type of exposure to the technology. Initially, personal computers were connected, or networked, to share fi les and printers and to provide central access to the users’ data. This type of network w...
A local area network (LAN) can be defi ned as a group of devices connected in a spe-cifi c arrangement called a topology. The topology used depends on where the network is installed. Some common legacy topologies such as the bus and ring and more modern topologies such as the star and mesh are discussed later in this chapter. Local area net-works a...
As computer networking continued to evolve, many businesses and organizations that used this type of technology needed to expand the LAN beyond the physical limits of a single room or building. These networks covered a larger geographical area and became known as wide area networks (WANs). As illustrated in Figure 1.2, WAN connectivity mostly consi...
Router Computer Workstations Dedicated or leased lines for WAN connections Network Printer
Wireless Access Point Router Ethernet LAN Wireless Client Devices File Server Computer Workstations
The metropolitan area network (MAN) interconnects devices for access to computer resources in a region or area larger than that covered by local area networks (LANs) but yet smaller than the areas covered by wide area networks (WANs). A MAN consists of net-works that are geographically separated and can span from several blocks of buildings to enti...
A campus area network (CAN) includes a set of interconnected LANs that basically form a smaller version of a wide area network (WAN) within a limited geographical area, usu-ally an offi ce or school campus. Each building within the campus generally has a separate LAN. The LANs are often connected using fi ber-optic cable, which provides a greater d...
computer physical network topology is the actual layout or physical design and intercon-nection of a computer network. A topology includes the cabling and devices that are part of the network. In the following sections you will learn about several different types of network topologies: Bus Ring Star Mesh Ad-hoc Point-to-point Point-to-multipoint Th...
Many years ago I was called to troubleshoot a problem on a small local area network using a bus topology. The network consisted of a network fi le server, about 20 client sta-tions, and a few network printers. The users complained of intermittent connection prob-lems with the network. After spending some time looking over the network, I decided to ...
The star topology, as shown in Figure 1.8, is the most commonly used method of connect-ing devices on a LAN today. It consists of multiple devices connected by a central connection device. Hubs, switches, and wireless access points are all common central connection devices, although hubs are rarely used today. The hub provides a single collision do...
The Physical layer (sometimes referred as the PHY) is the lowest layer in the OSI model. The PHY consists of bit-level data streams and computer network hardware connecting the devices together. This hardware that connects devices includes network interface cards, cables, Ethernet switches, wireless access points, and bridges. Keep in mind some of ...
The Presentation layer provides delivery and formatting of information for processing and display. This allows for information that is sent from one device on a network (the source) to be understood by another device (the destination) on the network.
One common method you can use to remember the seven layers of the OSI model from top to bottom is to memorize the following sentence: All people seem to need data processing. Take the fi rst letter from each word and that will give you an easy way to remember the fi rst letter that pertains to each layer of the OSI model. All (Application) People (...
Click the Start button. Mouse over the All Programs arrow. The All Programs window appears in the left pane. Navigate to and click on the Accessories folder. The accessories programs appear. Click the Command Prompt icon. The command window will appear. In the command window, typeipconfig /all. View the results in the command window. Notice the phy...
This chapter provided a survey of networking topics to help you understand the basics of computer networking as an introduction or a simple review. It began with an outline of the common network technology types: Local area networks (LANs) Wide area networks (WANs) Metropolitan area networks (MANs) Campus area networks (CANs) Personal area networks...
Understand the components of a local area network (LAN). A local area network is a group of computers connected by a physical medium in a specifi c arrangement called a topology. Know the different types of networks. The basic networks types are LAN, WAN, CAN, MAN, and PAN. Become familiar with various networking topologies. Bus, star, ring, mesh...
Dec 21, 2020 · A network consists of nodes, links between nodes, and protocols that govern data transmission between nodes. At whatever scale and complexity networks get to, you will understand what’s happening in all computer networks by learning the OSI model and 7 layers of networking.
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Networking is simply communication between two computers connected on a network. You can actually set up a network connection on a single computer as well. A network requires one computer to act as the server, waiting patiently for an incoming connection from another computer, the client.
