Author Topic: Computer Terms Beginning with "V"  (Read 1540 times)

Offline MysteRy

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Re: Computer Terms Beginning with "V"
« Reply #15 on: April 15, 2014, 09:17:25 AM »
VLE

Stands for "Virtual Learning Environment." A VLE is a virtual classroom that allows teachers and students to communicate with each other online. Class information, learning materials, and assignments are typically provided via the Web. Students can log in to the class website to view this information and may also download assignments and required reading materials to their computers. Some VLEs even allow assignments and tests to be completed online.

In a virtual classroom, the teacher may communicate with the students in real-time using video or Web conferencing. This type of communication is typically used for giving lectures and for question and answer sessions. If the teacher only needs to send out a homework assignment, he or she can simply post a bulletin on the class website. The students may also receive an e-mail notification letting them know a new assignment has been posted. If class members have questions about the homework, they can participate in online forums or submit individual questions to the teacher.

Virtual learning environments are a popular method of e-learning, which refers to learning through electronic means. While a VLE cannot fully replace the traditional classroom, it can be a useful way of teaching students who reside in many different locations.

Offline MysteRy

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Re: Computer Terms Beginning with "V"
« Reply #16 on: April 15, 2014, 09:18:13 AM »
VoIP

Stands for "Voice Over Internet Protocol," and is often pronounced "voip." VoIP is basically a telephone connection over the Internet. The data is sent digitally, using the Internet Protocol (IP) instead of analog telephone lines. This allows people to talk to one another long-distance and around the world without having to pay long distance or international phone charges.

In order to use VoIP, you need a computer, an Internet connection, and VoIP software. You also need either a microphone, analog telephone adapter, or VoIP telephone. Many VoIP programs allow you to use a basic microphone and speaker setup. Others requires VoIP phones, which are like regular telephone handsets, but typically connect to your computer via USB. Analog telephone adapters allow you to use regular phones with your computer. IP phones are another option that connect directly to a router via Ethernet or wirelessly. These phones have all the necessary software for VoIP built in and therefore do not require a computer.

The largest provider of VoIP services is Vonage, but there are several other companies that offer similar services. While Vonage charges a monthly service fee, programs like Skype and PeerMe allow users to connect to each other and talk for free. However, these free services may offer fewer connections, lower audio quality, and may be less reliable than paid services like Vonage.

VoIP is also referred to as IP telephony, Internet telephony, and digital phone.

Offline MysteRy

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Re: Computer Terms Beginning with "V"
« Reply #17 on: April 15, 2014, 09:19:06 AM »
Volume

The word "volume" has several different meanings. The most common definition is the magnitude or intensity of a certain sound. Volume may also refer to how much space a three-dimensional object takes up. However, in the always ambiguous realm of computers, the word volume can also refer to a specific data storage device.

Some examples of volumes include hard disks, DVD drives, and flash memory drives, such as USB keychain drives. Your computer recognizes all these data storage devices as volumes. The only requirement is that each volume has a file system that the computer can recognize. The file system tells the computer how the folders and files are organized on the volume.

On a Macintosh, all volumes connected to the computer (either directly or by a network connection) will show up on the desktop. For example, a hard drive will have a hard drive icon and a CD will have a CD icon. In Windows, you will find a list of all available volumes when you open "My Computer." If a volume is connected, but is not showing up on the screen, you can often use a disk utility program to "mount" the volume so that the computer can communicate with it.

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Re: Computer Terms Beginning with "V"
« Reply #18 on: April 15, 2014, 09:19:45 AM »
VPI

Stands for "Virtual Path Identifier." The VPI is an 8-bit header inside each ATM cell that indicates where the cell should be routed. ATM, or asynchronous transfer mode, is a method of sending data in small packets of fixed sizes. It is used by many ISPs (Internet Service Providers) for transferring data to client computers.

As an ATM cell moves across a network, it typically passes through several ATM switches. The VPI tells the switches where to route the packet of information, or what path to take. Hence the name, "virtual path identifier." The VPI is used in conjunction with the VCI, or virtual channel identifier.

Offline MysteRy

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Re: Computer Terms Beginning with "V"
« Reply #19 on: April 15, 2014, 09:20:29 AM »
VPN

Stands for "Virtual Private Network" (not a successor to the UPN television network). VPN is a network term that most computer users don't need to know, but at least you can impress your friends by talking about it. A virtual private network is "tunneled" through a wide area network WAN such as the Internet. This means the network does not have to be located in one physical location like a LAN. However, by using encryption and other security measures, a VPN can scramble all the data sent through the wide area network, so the network is "virtually" private.

Businesses often use VPNs to communicate across multiple locations. For example, a large company that has offices in several cities may need to send data to the different locations via the Internet. To keep the information secure, the company might set up a VPN with an encrypted connection. This is similar to having a secure intranet over the Internet. On a smaller scale, individual users may have a VPN account with their company, which allows them to connect to their office computer from their home or another location. This is especially helpful for business travelers who need to access office data from their laptops.

Offline MysteRy

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Re: Computer Terms Beginning with "V"
« Reply #20 on: April 15, 2014, 09:21:16 AM »
VRAM

Stands for "Video Random Access Memory" and is pronounced "V-RAM." System RAM is great for loading and running programs, but when you need graphics power, VRAM is where it's at. This is the memory used to store image data that the computer displays; it acts as a buffer between the CPU and the video card. When a picture is to be displayed on the screen, the image is first read by the processor and then written to the VRAM. The data is then converted by a RAM digital-to-analog converter (RAMDAC) into analog signals that are sent to the display. Of course, the whole process happens so quickly, you don't notice it. Unlike most system RAM, VRAM chips are dual-ported, which means that while the display is reading from VRAM to refresh the currently displayed image, the processor is writing a new image to the VRAM. This prevents the display from flickering between the redrawing of images.

There are many different types of VRAM. One popular kind is called Synchronous Graphics RAM (SGRAM). It is an inexpensive type of RAM that is clock-synchronized. This means data can be modified in a single operation rather than as a sequence of read, write, and update operations. This allows background, foreground, and image fills to be handled more efficiently. Another type of VRAM is Rambus Dynamic RAM (RDRAM). It is designed by Rambus and includes a proprietary Rambus bus that speeds up the transfer of data through it. Video editing pros like this chip since it is optimized for video streaming. A third type of VRAM is Window RAM (WRAM). This high-performance VRAM is dual-ported, has about 25% more bandwidth than standard VRAM, and typically costs less. Finally, there is Multibank Dynamic RAM (MDRAM). This is also high-performance VRAM, developed by MoSys, which divides the memory into divisions of 32 KB that can be accessed individually. This makes memory transfers more efficient and increases overall performance. Another advantage of MDRAM is that it can be manufactured with just the right amount of memory for a given resolution, so it is cheaper to manufacture than most other types of VRAM.

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Re: Computer Terms Beginning with "V"
« Reply #21 on: April 15, 2014, 09:21:54 AM »
VRML

Stands for "Virtual Reality Modeling Language." If you think this has something to do with HTML, you're right. While HTML is the format for Web page production, VRML is a 3D navigation specification, which enables the creation of interactive 3D Web sites. With VRML, visitors can take virtual tours through buildings and view three-dimensional models of cars directly from their Web browsers. Though the technology was created by Silicon Graphics and Intervista Software a number of years ago, it still is not widely used.

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