by Dinesh Thakur Category: Communication Networks

A high-speed network interface card (NIC) forcommunication networks is used.A network interface controller (also known as a network interface card, network adapter, LAN adapter) is a computer hardware component that connects a computer to a computer network.Network interface cards, commonly referred to as NICs are used to connect a PC to a computer network.



 
by Dinesh Thakur Category: Communication Networks

Transmission is the method by which computer networks send electrical signals. Data communication is concerned with the process of exchanging data electronically between two communication devices. In a local area network, all communication functions performed through direct cables. Computers located far away are connected through a particular form of the data communication link. The existing telephone or telegraphic network may also use for connecting computers located at remote locations.



 
by Dinesh Thakur Category: Communication Networks

Generally, some people use the term "Ethernet" or ether refers to cable. Ethernet was the original product designed by Xerox PARC based on Bob Metcalfe's idea. It was later upgraded to 10 Mbps by Xerox, Intel and DEC.

 
by Dinesh Thakur Category: Network Technologies

The word network protocol designates a set of rules or conventions to carry out a particular task. In data transmission, the network protocol is used in a less broad sense to indicate the set of rules or specifications that are used to implement one or more levels of the OSI model.

A network protocol defines that it communicates, how it communicates, and when it communicates. The critical elements of a network protocol are its syntax, its semantics and its timing.



 
by Dinesh Thakur Category: Network Technologies

UnGuided or also called wireless or wireless communication, transport electromagnetic waves without using a physical conductor. Instead, signals are radiated through the air (or, in a few cases, water) and therefore, are available to anyone with a device capable of accepting them.

The electromagnetic spectrum

 
by Dinesh Thakur Category: Network Technologies

Guided means are those that provide a conductor from one device to the other and include twisted-pair cables, coaxial cables, and fiber optic cables. A signal traveling by any of these means is directed and contained by the physical limits of the medium. Twisted pair and coaxial cable use metallic (copper) conductors that accept and carry electrical current signals. Fiber optic is a glass or plastic cable that accepts and transports signals in the form of light.

 
by Dinesh Thakur Category: Network Technologies

FDDI stands for Fiber Distributed Data Interface. It is a high-speed, high-bandwidth network based on optical transmissions. It is most often used as a network backbone, for connecting high-end computers (mainframes, minicomputers, and peripherals), and for LANs connecting high-performance engineering, graphics, and other workstations that demand a rapid transfer of large amounts of data. It can transport data at a rate of 100 Megabits per second and can support up to 500 stations on a single network. FDDI was designed to run through fiber cables, transmitting light pulses to convey information between stations, but it can also run on copper using electrical signals. It is relatively expensive to implement, although the mixing of fiber-optic with copper cabling can hold down the cost.



 
by Dinesh Thakur Category: Network Technologies

Digital Equipment Corporation (DEC) has given support to network connectivity for networks of its own and networks of other vendors also. DEC has its own architecture known as Digital Network Architecture (DNA) the product that implements the architecture is known as DEC net. The DNA was developed during 1974, to provide communication facility between various DEC systems.

 
by Dinesh Thakur Category: Network Technologies

The Systems Network Architecture (SNA) from IBM uses a 7 layer architecture similar to the OSI model.

 
by Dinesh Thakur Category: Network Technologies

Definition: Storage area network is abbreviated as SAN. SAN is a network which is designed to attach computer storage devices such as disk array controllers and tape libraries to servers. SAN network can be accessed by multiple computers. It is a secure and high-speed data network. It is also known as SAN storage, SAN network, etc.



 
by Dinesh Thakur Category: Network Technologies

Long-term Evolution abbreviated as LTE. We make use of LTE to refer to wireless broadband and other mobile network technologies. LTE standard was developed by the 3GPP (3rd Generation Partnership Project) in 2004.

 
by Dinesh Thakur Category: Network Technologies

Definition:  General Packet Radio Service is a packet-based wireless communication service. It promises data rate up to 114 kbps. It is a standard technology which extends the Global system. It abbreviated as GPRS. It is designed to replace the current circuit-switched services.

General Packet Radio Service is a non-voice and high-speed technology which is useful for the GSM networks. We make use of GPRS so that we can enable connections which depend on the internet protocol. As we know, IP supports a wide variety of applications. We can send and receive the compressed data and large volume data over the mobile network by using GPRS as the packet switching system used. So, before sending the data, it breaks the whole data into packets and then shifts them through the network. Now the data again assembled at the recipient side.



 
by Dinesh Thakur Category: Network Technologies

Cluster computing or High-Performance computing frameworks is a form of computing in which bunch of computers (often called nodes) that are connected through a LAN (local area network) so that, they behave like a single machine. A computer cluster help to solve complex operations more efficiently with much faster processing speed, better data integrity than a single computer and they only used for mission-critical applications.



 
by Dinesh Thakur Category: Network Technologies

A Wi-Fi network is made with many amenities, such as access points, antennas, bridges, controllers, etc. In this section, we will make an overview of the equipment in order to provide some features.

 
by Dinesh Thakur Category: Network Technologies

A sensor array is defined as a set of sensors connected to one another, each sensor being provided with a transceiver. Sensor networks are a new generation networks with specific properties, which do not fall within the conventional architectures.

 
by Dinesh Thakur Category: Network Technologies

Mesh networks (meshed networks) are ad-hoc networks in which routing points are immobile. Customers are connected by a wireless network access points and the access points are connected by wireless links.

 
by Dinesh Thakur Category: Network Technologies

Routing is the primary element of an ad-hoc network. It takes routing software in each network node to manage the transfer of IP packets. The simplest solution is obviously to have a direct routing, as illustrated in Figure, in which each network station can directly reach another station, without going through an intermediary. The simplest case corresponds to a small cell, with a diameter less than 100 m, as in an 802.11 network in ad-hoc mode.

 
by Dinesh Thakur Category: Network Technologies

Another big wireless network category is ad-hoc networks, where the infrastructure is composed as resorts themselves. The latter agreed to play the role of the router to allow the passages of information from one device to another, without these terminals are connected directly.



 
by Dinesh Thakur Category: Network Technologies

Wireless networks are developing due to the flexibility of their interface, which allows a user to change positions while staying connected. Communications between terminals can be made directly or via base stations, called access points, or AP (Access Point). Communication between access points can be wireless or cable. The flow rates of these networks are tens of megabits per second.

 
by Dinesh Thakur Category: Network Technologies

The local loop is to connect users to the first node, router or switch, the operator with whom the customer has a subscription. Broadband solutions is shared between the ATM for fixed links and Ethernet for wireless backhaul. One of the objectives in the Ethernet local loop is replaced by the ATM Ethernet solutions, particularly in the xDSL modems.

 

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About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.