Get familiar with Networking Terms

Network: A network is just a collection of devices and end systems connected to each other and able to communicate with each other.There are two types of topologies in networking. 

The physical topology is what the network looks like and how all the cables and devices are connected to each other.

The logical topology is the path our data signals take through the physical topology.

banner-home

Protocols are rules that govern how devices communicate and share information across a network. Examples of protocols include:

  • IP – Internet Protocol
  • HTTP – Hyper Text Transfer Protocol
  • SMTP – Simple Mail Transfer Protocol

Multiple protocols often work together to facilitate end-to-end network communication, forming protocol suites or stacks. 

Network reference models were developed to allow products from different manufacturers to interoperate on a network. A network reference model serves as a blueprint, detailing standards for how protocol communication should occur.

The Open Systems Interconnect (OSI) and Department of Defense (DoD) models are the most widely recognized reference models. 

Considerations in network

Speed –The biggest consideration

Delay – There must be specific delay for sending datas across the network.VOIP applications must follow time delay for proper communications

Availability – Network should be always available for applications accessing it

 

Types of Networks

Local area networks (LANs) are used to connect networking devices that are in a very close geographic area, such as a floor of a building, a building itself, or a campus environment

Wide area networks (WANs) are used to connect LANs together. Typically, WANs are used when the LANs that must be connected are separated by a large distance.

A MAN (Metropolitan Area Network) is another category of network, though the term is not commonly  used. A MAN is defined as a network that connects LAN’s across a city-wide geographic area.

An internetwork is a general term describing multiple networks connected together. The Internet is the largest and most well-known inter network.

Some networks are categorized by their function, as opposed to their size. A SAN (Storage Area Network) provides systems with high-speed, lossless access to high-capacity storage devices.

A VPN (Virtual Private Network) allows for information to be securely sent across a public or unsecure network, such as the Internet. Common uses of a VPN are to connect branch offices or remote users to a main office.