Desktop personal computer system basic parts defined

Learning basic computer conceptsIf you are studying personal computers as the beginning of your career in technology, or perhaps you are just trying to understand how things work on your home computer to better deal with problems and upgrades, you can't get away with not knowing some very basic definitions of the components of a desktop personal computer system.

There have been so many types of hardware and software over the years, keeping up to date on what is current is a full time job for many computer support technicians. This section is meant to be a brief introduction to common personal computer terms, we are only introducing you briefly to the basics.

If you are interested to learn more, many of the topics described here are covered in more detail throughout the websites of the Guru42 Universe. Over at our sister site we explore the history of technology and the evolution of personal computers.

The Data Link Layer of the OSI model

A network interface controller (NIC)The Data Link Layer is Layer 2 of the seven-layer OSI model of computer networking.  The Data Link layer deals with issues on a single segment of the network.

Layer two of the OSI model is one area where the difference between the theoretical OSI reference model and the implementation of TCP/IP with the competing Department of Defense (DoD) model. As we will discuss with the implementation of TCP/IP there is one lower layer called the network interface layer that encompasses Ethernet.

Physical Layer Topology in computer networking

Physical Layer Topology in computer networkingA network topology refers to the layout of the transmission medium and devices on a network. As a networking professional for many years I can honestly say about the only time network topology has come up is for certification testing. Here are some basic definitions.

Physical Topology:

Physical topology defines the cable's actual physical configuration (star, bus, mesh, ring, cellular, hybrid).


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