Your top adsl speed is based up on different of factors.

Some of them are:

• Distance between your local dslam and your router
• Quality of your telephone line
• Quality of your router
• Using wifi access or not(since wifi is slower than using old fashioned cords)
• Even your PC overall perfomance can increase or decrease your adsl speed(download or upload) since PC's with low ram capability or slow hard disk drives tend to give a bad influence to your maximum download adsl speed.

A number of factors can affect your bandwidth.

• The distance between your home and the ISP central office. The DSL signal has to travel over copper phone lines and can degrade at long distances, preventing your DSL connection from operating at its maximum possible speed.
• The number of users sharing your DSL connection. Many users in your neighborhood will generally share a connection from the DSL central office to a fiber internet backbone. At peak hours during the day, you will all be sharing that line and you can see your bandwidth decrease on average. This is probably the number-one biggest cause of a slowdown.
• Any additional hops beyond the DSL modem. If you have a router (wireless or otherwise) that share your DSL connection with multiple users, then your available bandwidth will be shared between those computers/users. Try password-protecting your wireless LAN and decreasing the number of hops between your device and the DSL router.
• Naturally, any bandwidth caps that your ISP might impose. Your ISP will often offer tiered service plans to its users to encourage them to pay more for more bandwidth.
• And finally, any other internet applications that might be running on your device will also share your bandwidth, say, if you were streaming music or using a BitTorrent client in the background when trying to stream video online.

You can properly test your bandwidth by heading on over to speedtest.net and running a test. Try doing this several times and during off-peak and peak traffic hours for where you live and you'll see a huge difference in your speeds.

Basic multimedia communication technology tends to cover a range of multimedia devices, such as sound cards and graphic cards that allow users to create visual presentations that output sound and /or images. Multimedia generally means the combination of two or more continuous media. The two media are normally audio and video, sound plus moving pictures. For example the digital camera may be used externally to the PC, and allows the user to record images. When connecting the camera to the computer, using a cord, images will be formatted and printed. Various computers have sound cards stored within them, this allows output of sound from speakers through the use of CD's, and other formats that may have music attached to it. Sound cards allow individuals to listen to music played or stored on their computer. Whereas Communications technology refers to the transmission of data from one computer to another from one device to another. Computer systems refer to an entire working computer. All computer systems consist of various components they include the case of the computer the power supply and many other components. The Motherboard in a computer that manages the communication and function of all information. The Processor is another term for (CPU) Control Panel Unit. A microprocessor chip, the CPU is the brain of the computer; it uses mathematical functions to perform calculations. Random Access Memory Also referred to as the (RAM) holds the application programs and data in current use, it may also be occupied by software as operating systems and interpreters. Computer systems also include a Bus, the Hard Drive which has encoding data on the hard drive there has been two approaches firstly being the MFM, and the next being RLL. Other components include Peripherals, Monitor, Keyboard, and various Pointed Devices including Joysticks. Computer Networks Computer networks are able to achieve communication between a couple of computers. Networks are split into three parts. Local Area Network A Local Area Network is also known as a (LAN) they are privately owned networks within a single building or campus. LANs are distinguished from other kinds of networks by three characteristics (1) their size, (2) their transmission technology, and (3) their topology. Hub This is a LAN device that broadcasts the information it receives to all attached devices and segments of the network. Bridge This limits the collision domain, can extend network distances, and can also filter packets on their MAC addresses and ease congestion. Router These have two functions firstly to determine the best path to a destination and to share path information the "route" with other routes. A router can also connect networks using different media and architectures, which enable them to determine the best path for a packet to reach another network. They can also filter broadcasts. Network Interface Card The Network Interface Card allows devices to connect to the network. They provide connections for any type of networking media, including wireless media. Internal hardware installed within computer amongst other devices that allow them to communicate on a network. Metropolitan Area Network This is constructed of LANs that are interconnected across a city or metropolitan area. An example of a MAN is the cable television network available in many cities. MANs require routers, telephone and ATM switches, and microwave antennas. They produce single points of connection between each LAN. ATM Switch A network device which is used by telecommunications companies like the local telephone company to support multiple connections on an ATM network. Wide Area Network This is also referred to as a (WAN) Two or more LANs or MANs, which are interconnected using slow-speed connections over telephone lines.

Modem A modem is a device used by telecommunications companies like the local telephone company to support multiple connections on an ATM network.