Networking Notes

I would like to discuss some basic networking notes especially helpful for beginners who are thinking of establish a good career in this field. These networking notes supply the fundamental details about network types, communication technology, network troubleshooting, network topologies, network products and also the fundamental summary of the WAN and LAN models of communication.

What is computer network?

Internet is simply a type of network. When several devices are attached to one another, generally we are able to refer to it as a network. If these devices are computer systems, we'll refer to it as a computer network.

What's DHCP?

DHCP means Dynamic Host Configuration Protocol. It is used to assign the computer IP addresses and also for other types of network configurations like DNS. DHCP cuts down the administrative tasks of manually assigning IPs to computer systems inside a network.

What's DNS and just how it really works?

DNS means Domain name system that translates host names into the network IPs and IP addresses into host names. Every computer and also domains on the web have designated distinctive IP addresses. Internet communication is dependent on these IP addresses. These addresses have been created in the format of 10.1.1.200, 192.168.2.0 etc. It is difficult to remember these IP addresses; however host names are simpler to remember than their IPs.

What is computer Firewall?

It is a protective boundary for any network. It prevents the access of unauthorized sources over the network. The majority of Microsoft operating-systems, for example Windows XP service pack2, have generated-in firewall utilities.

Types of networks

Essentially, you will find three kinds of computer networks: local area network (LAN), (Metropolitan Area Network (MAN) and Wide Area Network (WAN). The communication inside a WAN is dependent on Hubs. A WAN network covers a town, country or regions. LAN is the interconnection of different hubs, routers and other networking devices in a specific place joined with a cabling system. MAN network covers the range of a limited metropolitan area.

Voice over internet protocol (VOIP) Communication Technology

Voice over internet protocol means VoIP. This technology can be used for voice data transmission over a specific IP based on the long distance of a network to create telephone calls. Voice over internet protocol telephone calls is fairly inexpensive and many organizations, offices and home customers are utilizing Voice over internet protocol technology to make long distance telephone calls.

Wi Max Technology

It is basically a wireless broadband technology that is an advanced form of Wi Fi. Wi Max technology supports data, audio and video communication simultaneously at a good speed of 70 Megabyte per second.

Network Gateway

It can be hardware or software. A gateway is generally a joining reason within a network. It connects normally two systems. Computers connected by using two LAN cards act as a gateway.

Router

It routes visitors to its destination in line with the source and destination IP addresses that are put into the routing software that is referred to as a routing table.

Fiber Optic Cable

Fiber optics offers the quickest medium of communication for data, voice and video transfer. Data travels at the speed of light in these cables. Internet service providers and other corporate offices are often connected with one another using this fiber optic cable to supply high-speed connectivity.

What's File Server?

It is a computer inside a network that provides authentication to network consumers of networks like Home Window 2003 Servers.

OSI Model of seven layers

The fundamental reason for the seven layers OSI model is to comprehend the data transmission and communication system steps. These layers are Application layer, Presentation layer, Transport layer, Network layer, Data Link layer and Physical layer. Each layer has its own functionality for data transmission from source to destination.

GSM Technology

It is wireless short range technology. This technology is usually utilized in cell phones, portable products, audio players, Laptops, computer systems as well as in vehicles.