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Network Fundamentals

A network is simply a group of two or more Personal Computers linked together. Many types of networks exist, but the most common types of networks are Local-Area Networks (LANs), and Wide-Area Networks (WANs).

In a LAN, computers are connected together within a "local" area (for example, an office or home). In a WAN, computers are further apart and are connected via telephone/communication lines, radio waves or other means of connection.

How are Networks Categorized?

Networks are usually classified using three properties: Topology, Protocols and Architecture. 

Topology specifies the geometric arrangement of the network. Common topologies are a bus, ring and star.You can check out a figure showing the three common types of network topologies here.

Protocol specifies a common set of rules and signals the computers on the network use to communicate. Most networks use Ethernet, but some networks may use IBM's Token Ring protocol. We recommend Ethernet for both home and office networking. For more information, please select the Ethernet link on the left.

Architecture refers to one of the two major types of network architecture: Peer-to-peer or client/server. In a Peer-to-Peer networking configuration, there is no server, and computers simply connect with each other in a workgroup to share files, printers and Internet access.

This is most commonly found in home configurations and is only practical for workgroups of a dozen or less computers. In a client/server network there is usually an NT Domain Controller, to which all of the computers log on. This server can provide various services, including centrally routed Internet Access, mail (including e-mail), file sharing and printer access, as well as ensuring security across the network. This is most commonly found in corporate configurations, where network security is essential.

Display #
Title Hits
Introduction To Networking 37898
LAN Network Topologies 125897
Network Data Transmission 29260
Media Access Control - MAC Addresses 41346
Unicast 21851
Multicast - Understand How IP Multicast Works 172184
Multicast IP Address List 30688
Network Broadcast 51862
Controlling Broadcasts and Multicasts 21038
Hubs & Repeaters 36797
Switches & Bridges 44075
Power over Ethernet - Understanding PoE Technology, PoE Options & Power Requirements 27196
Need for Speed – The Data Tsunami & Advancements in Networking. From FastEthernet 100Mbps to Wireless 17.6Tbps! 11691
Introduction to Content Switching - Application & Virtual Server Load Balancing via Deep Packet Inspection 24286
Measuring Network Performance: Test Network Throughput, Delay-Latency, Jitter, Transfer Speeds, Packet loss & Reliability. Packet Generation Using Iperf / Jperf 77433
The Importance of a Network Analyzer – Packet Sniffer. Must-Have Features for Demanding Engineers & Administrators 12282

Tags: networks fundamentals architecture network categories power over ethernet PoE IP Addressing multicast Switches hubs broadcast

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