Chapter 6 Flashcards
Bandwidth
i. the amount of data able to be transferred to a location at one time. bits per second(bps), kilobits per sec (Kbps), megabits per sec (Mbps), gigabits per sec (Gbps). Gbps=1000 Mbps, Mbps = 1000 Kbps, Kbps = 1000 bps. Note that “bits” is used in the unit, if you want to use byte, you will need to convert based on 1 byte = 8 bits.
Attenuation
i. the loss of power in a signal as it travels from the sending device to the receiving device.
Broadband
i. multiple pieces of data sent simultaneously to increase the transmission rate.
Narrowband
i. voice-grade transmission that is only able to transmit up to 56,000bps, so only a limited amount of information can be sent at one time. (Ex. Dial-up connection)
Protocols
i. rules that govern data communication, such as error detection, message length, and transmission speed.
Components of Data communication system
Sender and Receiver Devices
i. Thin client: no processing power, just for receiving or sending information.
ii. Ex: video game console
Modems or routers:
i. Need to know the core function of modems—converting analog data to digital data and vice versa.
ii. Need to know what router is and how it functions (refer to the routing section below).
Communication medium
i. Need to know the two major types (and four subtypes) of communication media: conducted (light conductors and electric conductors) and radiated (radio frequency and light frequency).
Local Area Networks (LAN)
i. connects workstations and devices that are nearby, has geographical limitations, and is used most commonly for resource sharing.
Wide Area Networks (WAN)
i. can reach other cities, states, and countries, owned by different parties, uses multiple communication media, and is able to connect networks.
Metropolitan Area Networks (MAN)
i. communication for multiple organizations and nearby cities.
