Tag: science & technology

A Trojan (or Trojan horse) is malicious software that disguises itself as legitimate software but does not replicate or copy itself. Unlike worms and viruses, Trojans rely on user deception to spread and typically create backdoors, steal data, or damage systems once executed. Joke programs are harmless, worms actively replicate, and hoaxes are false warnings about non-existent viruses. The defining characteristic of a Trojan is its non-replicating nature combined with malicious payload delivery.

The McDonald's screensaver was a well-documented hoax virus warning that spread through email chains in the early 2000s. It warned users about a supposed virus attached to a McDonald's screensaver, but the virus did not actually exist. Hoax viruses are fake warnings that cause panic and waste resources without any actual malicious code. Alien.worm, Merry Xmas, and Adolph represent actual or hypothetical malware rather than documented hoaxes.

In 1983, Dr. Frederick Cohen presented the first formal academic definition and demonstration of a computer virus during a seminar at the University of Southern California. His doctoral thesis on computer viruses established the foundational terminology and research in this field. While McAfee, Norton, and Smith are all significant names in antivirus history, Cohen is credited with the first formal academic definition of the term 'computer virus.'

A file server is a computer in a network that stores and manages files, allowing other computers (clients) on the network to access, store, and share those files. It serves as the central repository for documents, applications, and other files that multiple users need to access. Clip art refers to graphics, motherboards are computer circuit boards, and peripherals are external devices like keyboards and printers. The file server's specific role is centralized file storage and sharing across a network.

RISC stands for Reduced Instruction Set Computer, a CPU design philosophy that uses a small, highly optimized set of instructions rather than a large complex set. RISC processors execute simpler instructions more quickly, typically in one clock cycle, leading to better performance and efficiency. The other options (Remodeled Interface System Computer, Remote Intranet Secured Connection, Runtime Instruction Set Compiler) are fabricated expansions that don't represent real computer architecture concepts.

A GPU (Graphics Processing Unit) is a specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate the creation of images in a frame buffer intended for output to a display device. GPUs are essential for rendering graphics, video processing, gaming, and increasingly for parallel computing tasks like machine learning. The options Grouped Processing Unit, Graphical Portable Unit, and Graphical Performance Utility are incorrect expansions of this standard industry term.

ECP stands for Extended Capabilities Port, an advanced parallel port protocol that improves upon the original Centronics parallel port design. ECP supports bidirectional communication, higher data transfer rates, and DMA (Direct Memory Access) for improved performance with printers and other peripherals. The other options (Extra Compatible Part, Extended Connection Port, External Cordless Peripheral) are incorrect expansions.

FMD stands for Fluorescent Multi-Layer Disc, an optical disc technology that uses multiple fluorescent layers to store data, allowing much higher storage capacity than traditional DVDs or CDs. Each layer can be read independently without interference from other layers, enabling terabytes of storage on a single disc. The options FastEthernet Measuring Device, Flashing Media Diode, and Flash Media Drive are incorrect expansions.

VCM stands for Virtual Channel Memory, a memory architecture technique used to improve memory performance by allowing multiple virtual channels to share the same physical memory resources. The other options like Virtual Connection Manager, Voice Controlled Modem, and Voice Communications Module are not standard computer terminology acronyms.

An intranet is a private network that uses internet protocols to serve the internal informational needs of a single organization. It is not used to transfer information outside the company or between different organizations - that would be an extranet or public internet.