User talk:Oldschoolboy21

1.Direct memory access (DMA) is a feature of modern computers

and microprocessors that allows certain hardware subsystems

within the computer to access system memory for reading and/or

writing independently of the central processing unit.

2. In computing, an interrupt is an asynchronous signal

indicating the need for attention or a synchronous event in

software indicating the need for a change in execution.

3. A Cache memory is a cache used by the central processing

unit of a computer to reduce the average time to access memory.

The cache is a smaller, faster memory which stores copies of

the data from the most frequently used main memory locations.

As long as most memory accesses are cached memory locations,

the average latency of memory accesses will be closer to the

cache latency than to the latency of main memory.

4. Virtual memory is an integral part of a computer

architecture; all implementations require hardware support,

typically in the form of a memory management unit built into

the CPU.

5. Main memory or internal memory, often referred to simply as

memory, is the only one directly accessible to the CPU. The CPU

continuously reads instructions stored there and executes them

as required.

6. Secondary storage (or external memory) differs from primary

storage in that it is not directly accessible by the CPU. The

computer usually uses its input/output channels to access

secondary storage and transfers the desired data using

intermediate area in primary storage.

7. Memory Access time is the delay time between the moment a

memory controller tells the memory module to access a

particular memory column on a RAM memory module, and the moment

the data from given array location is available on the module's

output pins. In general, the lower the CAS latency, the better.

8. Memory Cycle time Memory refer collectively to a set of four

numerical parameters called CL, tRCD, tRP, and tRAS, commonly

represented as a series of four numbers separated with dashes,

in that respective order.

9. In computer technology, transfer and its more common

derivatives gigatransfer (GT) and megatransfer (MT) refer to a

number of data transfers (or operations). It is also known as

data samples captured per second, and each sample normally

occurs at the clock edge.

10. A memory management unit (MMU), sometimes called paged

memory management unit (PMMU), is a computer hardware component

responsible for handling accesses to memory requested by the

CPU.

11. The Internet Protocol Suite is the set of communications

protocols used for the Internet and other similar networks. It

is commonly also known as TCP/IP, named from two of the most

important protocols in it: the Transmission Control Protocol

(TCP) and the Internet Protocol (IP), which were the first two

networking protocols defined in this standard.

12. Wireless Application Protocol (WAP) is an open

international standard[1] for application-layer network

communications in a wireless-communication environment. Most

use of WAP involves accessing the mobile web from a mobile

phone or from a PDA.

13. Static Switching 14. Virtual Switching

15. A virtual LAN, commonly known as a VLAN, is a group of

hosts with a common set of requirements that communicate as if

they were attached to the same broadcast domain, regardless of

their physical location.

16. A local area network (LAN) is a computer network covering a

small physical area, like a home, office, or small groups of

buildings, such as a school, or an airport. The defining

characteristics of LANs, in contrast to wide area networks

(WANs), include their usually higher data-transfer rates,

smaller geographic area, and lack of a need for leased

telecommunication lines.

17. WANs are used to connect LANs and other types of networks

together, so that users and computers in one location can

communicate with users and computers in other locations. Many

WANs are built for one particular organization and are private.

18. The Internet is a global system of interconnected computer

networks that use the standard Internet Protocol Suite (TCP/IP)

to serve billions of users worldwide. It is a network of

networks that consists of millions of private, public,

academic, business, and government networks of local to global

scope that are linked by a broad array of electronic and

optical networking technologies.

19. An intranet is a private computer network that uses

Internet Protocol technologies to securely share any part of an

organization's information or network operating system within

that organization.

20. Ethernet is a family of frame-based computer networking

technologies for local area networks (LANs). The name came from

the physical concept of the ether. It defines a number of

wiring and signaling standards for the Physical Layer of the

OSI networking model as well as a common addressing format and

Media Access Control at the Data Link Layer.