USB Drives

USB drives means Universal Serial Bus.USB flash drives also known as USB drives, key drives, pen drives or thumb drives.USB drives are NAND-type flash memory data storage devices incorporated with a USB interface. They are typically small, lightweight, detachable and rewritable. As of April 2007, memory capacities for USB Flash Drives currently are sold from 32 megabytes up to 64 gigabytes .Capacity is limited only by current flash memory densities, although cost per megabyte may increase quickly at higher capacities due to the expensive components.

USB flash drives offer possible advantages over other portable storage devices, particularly the floppy disk. They are more compact, generally faster, hold more data, and are more consistent than floppy disks. These types of drives use the USB mass storage standard, supported natively by recent operating systems such as Linux, Mac OS X, Unix, and Windows.

Wi-Fi

Wi-Fi is a product originally licensed by the Wi-Fi Alliance to illustrate the embedded technology of wireless local area networks (WLAN) based on the IEEE 802.11 specifications. Wi-Fi was developed to be used for mobile computing devices, such as laptops in LANs, but is now increasingly used for more services, together with Internet and VoIP phone access, gaming, and basic connectivity of consumer electronics such as televisions, DVD players, and digital cameras. More standards are in advance that will allow Wi-Fi to be used by cars on highways in support of an intellectual Transportation System to increase safety, gather statistics, and enable mobile commerce.

A person with a Wi-Fi enabled mechanism such as a pc, cell phone or PDA can connect to the Internet when in proximity of an access point. The region enclosed by one or several access points is called a hotspot. Hotspots can range from a single room to many square miles of overlapping hotspots. Wi-Fi can also be used to create a mesh network. Both architectures are used in community networks.

Network Monitoring

The term network monitoring describes the use of a system that always monitors a computer network for slow or failing systems and that notifies the network administrator in case of outages via email, pager or other alarms. It is a subset of the functions occupied in network management.

While an interruption detection system monitors a network for threats from the outside, a network monitoring system monitors the network for troubles due to overloaded and/or crashed servers, network connections or other devices.

usually measured metrics are response time and availability (or uptime), although both consistency and reliability metrics are starting to increase popularity.Status request failures, such as when a connection cannot be established, it times-out, or the document or message cannot be retrieved, usually produce an action from the monitoring system. These actions vary: an alarm may be sent out to the resident (SMS, email,...) sysadmin, automatic failover systems may be activated to remove the disturbed server from duty until it can be repaired, etcetera.Monitoring the performance of a network uplink is also known as network traffic measurement, and more software is listed there.

Hard Disk

A hard disk is a non-volatile storage device which stores digitally programmed data on rapidly rotating platters with magnetic surfaces. Strictly speaking, "drive" refers to a device that drives (removable) media, such as a tape drive or (floppy) disk drive, although a hard disk contains fixed (non-removable) media. Recently the hard disk has become more commonly known as the "hard drive".

Hard disks were initially developed for use with computers. In the 21st century, applications for hard disks have extended beyond computers to consist of digital video recorders, digital audio players, personal digital assistants, digital cameras, and video game consoles. In 2005 the first mobile phones to contain hard disks were introduced by Samsung Group and Nokia. The need for large-scale, reliable storage, independent of a particular device, led to the beginning of configurations such as RAID, hardware such as network attached storage (NAS) devices, and systems such as storage area networks (SANs) for efficient access to large volumes of data

Computer Networking

Computer networking is the engineering discipline anxious with communication between computer systems. Such communicate systems comprise a computer network and these networks generally involve at least two devices able of being networked with at least one usually being a computer. The devices can be separated by a small number of meters or nearly unlimited distances. Computer networking is sometimes considered a sub-discipline of telecommunications, and sometimes of computer science, information technology and computer engineering. Computer networks rely a lot upon the abstract and practical application of these scientific and engineering disciplines.

A computer network is any set of computers connected to each other. Examples of networks are the Internet, a wide area network that is the largest to always exist, or a little home local area network (LAN) with two computers connected with standard networking cables connecting to a network interface card in each computer.