Management Info Tech Chapter 6
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57 terms
Terms | Definitions |
|---|---|
 Telecommunications | Transmittal of data and information from one point to another to allow communications over large distances |
| Networking technologies improve businesses by providing: | -Better business communication -Greater effciency -Better distribution of data |
| Telecommunications in Business | -Instant transactions -flexible and mobile workforce -alternative channels |
| Telecommunications in Daily Use | -cell phones -videoconferencing -wireless payments and warehousing -peer to peer file sharing -web empowered commerce |
| Increasingly fast communication allows Org's to: | -Conduct business -research -market -educate & train -shop, business, and pay |
| Radio Frequency Identification | -enables rapid transactions and payments -used at gas stations for payment at pump -used to track & locate items in warehouse |
| Bandwidth | Speed at which data is communicated, also called transmission rate or bit rate |
| Bits Per Second | Unit of measure for bandwidth |
| Broadband | Cummnunications medium that can carry multiple transmissions simultaneously |
| Baseband | Communications medium that carry one transmission at a time |
| Types of Communications Media | -tangible media -intangible media |
| Tangible Media | -twisted pair cable -coaxial cable -optical fiber |
| Intangible Media | Microwave radio technology |
| Twisted Pair Cable | Pairs of insulated copper wires twisted together |
| Coaxial Cable | For cable television transmission |
| Optical Fiber | Use light to represent bits Can carry signals for longer distances |
| Radio Frequency Technology | Use radio waves to carry bits. -WiFi & Bluetooth |
| Microwaves | High-frequency radio waves that can carry signals with high accuracy over long distances. |
| Network | Combination of devices connected through w communication media |
| Three Types of Networks | -LANs -MANs -WANs |
| Logical Area Network (LAN) | Established by a single organization and shared among employees. |
| Wireless LANs | Offer advantages such as: -easier installation -more scalable -more flexible |
| Scalability | Ease if expanding system |
| Metropolitan Area Network (MAN) | Links multiple LANs within a large city -usually uses fiber optic or wireless broadband connections between LANs |
| Wide Area Network (WAN) | Far reaching system of networks composed of public or private LANs or MANs |
| Personal Area Network (PAN) | Wireless network designed for handheld devices |
| Internet Service Provider (ISPs) | Preferred method of conducting e-commerce |
| Value-Added Networks (VANs) | Networks with enhanced services offered by outside vendors |
| Virtual Private Network (VPN) | Utilizes the internet, a public network, to stimulate a private network that only authorized users can access |
| Networking Hardware | Networks use a variety of devices to connect computers and peripheral devices |
| Bridge | Connects two networks |
| Router | Routes data packets to the next node on the path to the final destination |
| Repeater | Amplifies or regenerates signals |
| Modem | Translates communication signals from analog to digital and vice versa |
| Dial-Up Connection | Slower type of connection through modem, usually no faster than 56 Kbps |
| Switchng Techniques | Specify how messages travel to their destinations |
| Circuit Switching | Dedicated channel is established for the duration of the transmission |
| Packet Switching | -message broken into packets -packets are transmitted independently -packet numbers are used to reassemble the packets at destination |
| Packet | Group of bits transmitted together |
| Frame Relay | High speed packet switching protocol used in WANs |
| Protocol | Set of rules governing commotion between computers |
| Transmission Control Protocol/Internet Protocol (ICP/IP) | The most important set of protocols for telecommunications and networks |
| Access Point | Connection between wireless device and a wired network |
| Encryption | Ability to scramble messages |
| Ethernet | LAN protocol using coaxial or Cat 5 or 6 twisted pair cable |
| Generations in Mobile Connections | -1G: analog -2G: digital voice encoding -3G: increased speeds -4G: digital only |
| Downstream | Speed of receiving from network |
| Upstream | Speed of transmitting to network |
| Digital Subscriber Line (DSL) | Data remains digital through entire transmission |
| Asymmetric DSL | Allows different upstream and downstream rates |
| Symmetric DSL | Provides high speed in both directions for short distance communication |
| T1 & T3 Lines | Point to point dedicated digital circuits provided by telephone companies |
| Satellite | Use microwave radio transmissions |
| Fixed wireless | Point to point transmission between two stationary devices, typically between two buildings |
| Fiber to the Home (FTTH) | When the optical fiber reaches the subscriber's living or work space |
| Optical Carrier (OC) | Provides service through optical fiber lines |
| Broadband Over Power Lines (BPL) | Uses electric power lines to carry digital signals |
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