| A | B |
|---|
| Active Hub - | A device that regenerates received signals and sends them along the network. |
| Active topology - | A network topology which the computers are responsible for sending the data along the network. |
| Attenuation - | A loss of signal strength, a loss of a single can occur on a wire and wireless network. |
| Backbone - | a segment that is single used in a bus topology, computers are connected in a straight line |
| Bus - | A backbone cable segment of this major topology which computers connect to form a straight line. |
| Diagram | An illustration of a plan, in networking it describes a design. |
| Hub | -used to connect segments of a LAN that uses multiple ports. |
| Hybrid hub - | a device used to interconnect different types of cables and to maximize network efficiency. |
| Layout - | A illustration of a plan, in networking it describes a design. |
| Map - | a sketch or plan; a representation. |
| Mesh - | A mesh network in which every device connects to every other is called a full mesh. It’s a hybrid network topology used for fault tolerance, and one in which all computers connect to each other. |
| Passive hub - | Central connection point, with no amplification or regeneration, requires no electrical power. |
| Passive topology- | The computers on the network simply listen and receive the signal, they don’t amplify the signal in any way. |
| Repeater - | Regenerate incoming signals to extend the range of local area networks. |
| Ring - | Data that is passed round the ring in one direction only, like a loop. |
| Signal bounce - | A no terminated signal that continues to navigate the network. |
| Local Area Network – | a wireless LAN is simply a network linking two or more computers without wires (cables). |
| Mobile Computing – | is the use of portable computing devices (such as laptop and handheld computers) in conjunction with mobile communications technologies to enable users to access the Internet and data on their home or work computers from anywhere in the world. |
| Line-of-sight Networks – | transmits only if the transmitter and receiver have a clear line of sight between them. • Broadband Optical Telepoint Network – is capable of handling high quality multimedia requirements that can match those provided by a cabled network. |
| Narrow-band Radio | – the nominal 3- kHz bandwidth allocated for single channel radio that provides a transmission path for analog and quasi-analog signals. |
| Single-frequency Radio | – Any change in the frequency of a radio transmitter or oscillator |
| Federal Communications Commission (FCC) | – regulates interstate and international communications by radio, television, wire, satellite and cable in all 50 states, the District of Columbia and U.S. territories. |
| Name the four kinds of infrared LANs | Line-of-sight networks Reflective wireless networks Scatter infrared networks Broadband optical telepoint networks |
| IEEE 802.11 | Wireless Networking Standard resulted in inexpensive, reliable, wireless LANs for homes and businesses |
| 802.11b | standard provides bandwidth of 11 Mbps at frequency of 2.4 GHz |
| 802.11a | standard provides bandwidth of 54 Mbps at 5 GHz frequency |
| 802.11g, | to be ratified in 2003, will operate at 54 Mbps at frequency of 2.4 GHz |
| Name the four wireless LAN technologies used for transmitting and receiving data. | Answer: infrared, laser, narrow-band, spread-spectrum radio |
| A switch | is a specialized networking device that manages networked connections between any pair of star-wired devices on a network. |
