Hardware

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 * Hardware || The physical parts, which you can see and touch, are collectively called hardware
 * Central Processing Unit (CPU) || The portion of a computer system that carries out the instructions of a computer program, and is the primary element carrying out the computer's functions.
 * Hard Disk Drive (HDD) || A non-volatile, random access device for digital data. It features rotating rigid platters on a motor-driven spindle within a protective enclosure. Data is magnetically read and written on the platter by read/write heads that float on a film of air above the platters.
 * Dongle || Must connect a laptop or desktop computer. Mainly used for the purpose of copy protection or authentication of software.
 * Firewall || Part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. It is a device or set of devices that is configured to permit or deny network transmissions based upon a set of rules and other criteria. Firewalls can be implemented in either hardware or software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.
 * Access point || [[image:http://www.bitnetwork.com.br/images/access_4.jpg width="240" height="226"]]A device that allows wired communication devices to connect to a wireless network. ||
 * Media Access Control || A sublayer of the Data Link Layer specified in the seven-layer OSI model (layer 2). It provides addressing and channel access control mechanisms that make it possible for several terminals or network nodes to communicate within a multi-point network, typically a local area network (LAN) or metropolitan area network (MAN). ||
 * Router || The router determines where the signals have to go. Each signal it receives is called a data packet. The packet contains address information that the router uses to divert signals appropriately. Can be identified as an electronic device that intercepts signals on a computer network.
 * Universal Serial Bus (USB) || a specification to establish communication between devices and a host controller (usually personal computers).
 * Uninteruptible Power Supply (UPS) || An electrical apparatus that provides emergency power to a load when the input power source, typically the utility mains, fails.
 * Random Access Memory (RAM) || A form of computer data storage. It takes the form of integrated circuits that allow stored data to be accessed in any order (i.e., at random). "Random" refers to the idea that any piece of data can be returned in a constant time, regardless of its physical location and whether it is related to the previous piece of data.
 * Firewire || a serial bus interface standard for high-speed communications and isochronous real-time data transfer, frequently used by personal computers, as well as in digital audio, digital video, automotive, and aeronautics applications.
 * Power Supply Unit (PSU) || a device that supplies electrical energy to one or more electric loads.
 * Proxy Server || It is in charge of inspecting each packet passing through the network and accepts or rejects it based on user-defined rules.
 * Motherboard || The central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system, while providing connectors for other peripherals.
 * Solid-State Drive (SSD) || A data storage device that uses solid-state memory to store persistent data. ||
 * Packet Filter || Is in charge of inspecting each packet passing through the network and accepts or rejects it based on user-defined rules.
 * Digital Video Disc (DVD) || An optical disc storage media format. Its main uses are video and data storage. DVDs are of the same dimensions as compact discs (CDs), but are capable of storing almost seven times as much data. ||
 * Regulated PSU || The one that controls the output voltage or current to a specific value; the controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply's energy source.
 * Application Gateway || It applies security mechanisms to specific applications, such as FTP and Telnet servers.
 * Category 5 Cable (Cat5 or Cat-5) || A twisted pair high signal integrity cable type often referred to as Cat5 or Cat-5. Most Category-5 cables are unshielded, relying on the twisted pair design for noise rejection.
 * Circuit-Level Gateway || Type of fire wall that monitor TCP handshaking between packets to determine whether a requested session is legitimate. Information passed to a remote computer through a circuit level gateway appears to have originated from the gateway. This is useful for hiding information about protected networks. Circuit level gateways are relatively inexpensive and have the advantage of hiding information about the private network they protect. On the other hand, they do not filter individual packets.
 * Computer Case || The enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse).
 * Computer Fan || Placed inside a computer case for cooling purposes, and may refer to fans that draw cooler air into the case from the outside, expel warm air from inside, or move air across a heatsink to cool a particular component.
 * Security Tokens || Known to be used to prove one's identity electronically (as in the case of a customer trying to access their bank account). The token is used in addition to or in place of a password to prove that the customer is who they claim to be. The token acts like an electronic key to access something.
 * Network Interface Card (NIC) || A computer hardware component that interfaces to a computer network and allows computers to communicate over a computer network.
 * Read Only Memory (ROM) || In a computer memory read-only.