A computer network consists of different devices together to share and provide boost the signal, voice and data. Network devices or components are connected to the physical network. There are a large number of network devices and growing daily. The basic network devices are: PCs, servers, hubs, switches, bridges, routers, modems, printers, DSL modems and routers, gateways, cabling, network cards and wireless access point. What follows is an overview of each of these network devices.
Personal Computer: The personal computer is usually a desktop computer, workstation or laptop. Personal computers will be used frequently in an organization or for personal use. Personal computers are the most common types of micro-computers.
Server: A server is a computer on a network, application and process is used to exchange data and resources between the other networked computers. A server stores all the necessary information and provides various services such as access to computer workstation logon, Internet sharing, printer sharing, the sharing of disk space, etc. There are different types of servers, for example, file servers and print servers, database – Proxy server, fax server, backup server, etc. A database server stores all data and software that can be linked at the base to access certain data and other network devices, and process database queries. A file server is used to store information from any user on the network and a print server manages one or more printers on a network. Similarly, a network server a server that network traffic is managed.
NIC: network interface cards are connected to the computer or other network devices and used to enable connectivity between two computers. Each network is designed specifically for the different types of networks such as Ethernet, FDDI, Token Ring designed and wireless networks. The NIC is working on the first and second layer of the OSI model: the physical layer and data link layer specifications. NIC essentially defines the physical connection methods, and control signals, which enables the programming of data transmission over the network.
Hubs: Hub is a simple network. The function of the platform is the dissemination of data to knowledge is transmitted for all ports of a hub, regardless of whether the data were for specific systems in the network or not intended. Computers on a network connected to a hub with twisted pair (CAT5) cables. There are two types of hubs. 1st Active Forum. 2nd Passive hubs.
Hub: The hub-switching (also called “switch” is the easiest front wheel hub. Connected in a central database of all computers, the platform and the speed of the network is defined by the slowest NIC connected computer. For example, if you have a 10/100 Mbps network cards and a card with a speed of 10 Mbps, then the system can not run faster than 10 Mbps. Well, if you have a switch in a network that will allow all connections to the network faster, stay in top gear and still interact with the system 10Mbps.
Switch: Switch is a device that intelligence hub. Switch is a Layer 2 device. Swith provides the same function as a hub or a bridge, but it has the function before the two computers together temporarily. Switch provides the switching matrix or switch fabric that can connect and disconnect ports. Unlike hubs, switches, sends or transmits the data to the computer, and it distributes information about all ports.
Modems: Modems are devices that are used to digital data into analog format and translate vice versa. It fulfills two main functions. Modulation and demodulation. A modulated data can travel over phone lines. The modem modulates the signals on the sending end and demodulates the reception. Modems are needed for different types of access methods such as ISDN, DSL and 56K modem data. Modem, internal devices in the expansion of ports in a system that can plug or external devices that are connected to the USB or serial port. have built in laptop computers, PCMCIA cards are designed for this purpose and many new laptops with built-in modem. Specialized devices are designed to be used in systems such as handheld computers. In the ISP where the modems are required scale, rack-mounted modems are used.
Router: Routers route data between two networks logically and physically distinct. A router has the ability, the destination address for the data to determine and thus to continue the best way for the data to their journey. Router will have this ability through their software called routing software. Unlike bridges and switches, the hardware configured MAC address, use the data to determine the destination, the router, the logical network address is the IP address used in the decision making in determining the destination of the data.
Gateway: A gateway plays the role of the translation of data from one format to another without changing the data. A gateway to a device, system software. A computer with two network cards can function as a gateway. Router acts as a gateway, for example, is technically a router that routes data to an IPX network to an IP network a goal. The same applies, are converts an Ethernet network for the switch translation said to a Token Ring network.
LEAD: There are two common types of cables. 1st 10BaseT and 10Base2. 10baseT is a four-pair cable. 10baseT two types of first UTP (Twisted Pair) and 2 STP (Shielded Twisted Pair. Is STP the most secure cable with silver paper covered Twisted-coating to protect the cable. On the other side looks like 10Base2 uses thin coaxial copper, often connect to a TV and VCR. 10BaseT / Cat5 cables are most commonly used cable to computer. He has a connector (like a telephone connection called) RJ45.
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network components and devices