Network Connection

What is Bluetooth?

• Bluetooth is  a proprietary open wireless technology standard for exchanging data over short distances 
•   Sending music or pictures to other peoples phone from a short distance or long  distance.

What is wireless?

qWireless networking (i.e. the various types of unlicensed 2.4 GHz Wi-Fi devices) is used to meet many needs. Perhaps the most common use is to connect laptop users who travel from location to location. Another common use is for mobile networks that connect via satellite. A wireless transmission method is a logical choice to network a LAN segment that must frequently change locations. The following situations justify the use of wireless technology:

qTo span a distance beyond the capabilities of typical cabling,

qTo provide a backup communications link in case of normal network failure,

qTo link portable or temporary workstations,

qTo overcome situations where normal cabling is difficult or financially impractical, or

qTo remotely connect mobile users or networks.

 What is 3G?

—3G or 3rd generation mobile telecommunications is a generation of standards for mobile phones and mobile telecommunication services.

—Application services include wide-area wireless voice telephone, mobile Internet access, video calls and mobile TV, all in a mobile environment.

What is 4G?

• 4G is the fourth generation of cellular wireless standards. It is a successor to the 3G and 2G families of standards.
• —  A 4G system is expected to provide a comprehensive and secure all-IP based mobile broadband solution to laptop computer wireless modems, Smartphone's and other mobile devices.

What is Network Interface Cards

 

—An Ethernet network interface card is installed in an available slot inside the computer. The NIC assigns a unique address called a MAC (media access control) to the machine. The MACs on the network are used to direct traffic between the computers. The back plate of the network interface card features a port that looks similar to a phone jack, but is slightly larger. This port accommodates an Ethernet cable, which resembles a thicker version of a standard telephone line. Ethernet cable must run from each network interface card to a central hub or switch. The hub or switch acts like a relay, passing information between computers using the MAC addresses and allowing resources like printers and scanners to be shared along with data.

—A network interface card does not have to be hard wired with physical cable. Wireless Ethernet cards are installed like their wired counterparts, but rather than a port for an Ethernet cable, the card features a small antenna. The card communicates with the central wireless switch or hub via radio waves. Wireless  LANs may have some restrictions depending on the material the building is made from. For example, lead in walls can block signals between the network interface card and hub or switch.