Ch. 08 Communications and Networks
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| show | started in the 1980s using analog radio signals to provide analog voice transmission service.
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| 2G (second-generation mobile telecommunications) | show 🗑
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| 3G (third-generation mobile telecommunications) | show 🗑
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| show | has begun to replace 3G networks in some areas with providers using LTE (Long Term Evolution) connections to provide faster transmission speeds.
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| show | are continuous electronic waves
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| asymmetric digital subscriber line (ADSL) | show 🗑
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| show | all communications in a bus network travel along this bus.
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| show | is a measurement of the width or capacity of the communication channel. Effectively, it means how much information can move across the communication channel in a given amount of time
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| show | is widely used to connect individual computers that are located close to one another. Like broadband, it is able to support high-speed transmission.
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| Bluetooth | show 🗑
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| show | is widely used for DSL, cable, and satellite connections to the Internet. Several users can simultaneously use a single broadband connection for high speed data transfer.
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| show | —each device is connected to a common cable called a bus or backbone, and all communications travel along this bus.
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| cable modem | show 🗑
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| cable service | show 🗑
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| cellular | show 🗑
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| show | , including Verizon, AT&T, Sprint, and T-Mobile, support voice and data transmission to wireless devices using cellular networks. These networks have gone through different generations.
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| cell | show 🗑
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| cell tower | show 🗑
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| show | a node that requests and uses resources available from other nodes. Typically, a client is a user’s personal computer.
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| show | use central servers to coordinate and supply services to other nodes on the network. The server provides access to resources such as web pages, databases, application software, and hardware.
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| coaxial cable | show 🗑
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| communication channel | show 🗑
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| show | are electronic systems that transmit data from one location to another. Whether wired or wireless, every communication system has four basic elements.
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| computer network | show 🗑
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| show | is a concept related to using computer networks to link people and resources.
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| show | is the process of converting from analog to digital.
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| show | using existing telephones and telephone modems to connect to the Internet. This type of service has been replaced by higher-speed connection services including DSL, cable, satellite, and cellular services.
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| digital signal | show 🗑
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| digital subscriber line (DSL) | show 🗑
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| digital subscriber line (DSL) service | show 🗑
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| directory server | show 🗑
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| show | converts text-based addresses to IP addresses. For example, whenever you enter a URL, say www.mhhe.com, _ converts this to an IP address before a connection can be made.
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| downlink | show 🗑
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| Ethernet | show 🗑
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| Ethernet cable | show 🗑
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| show | is a private network that connects more than one organization. Many organizations use Internet technologies to allow suppliers and others limited access to their networks.
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| fiber-optic cable | show 🗑
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| fiber-optic service (FiOS) | show 🗑
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| firewall | show 🗑
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| global positioning system (GPS) | show 🗑
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| hierarchical network | show 🗑
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| home network | show 🗑
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| show | any computer system connected to a network that provides access to its resources.
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| show | Wireless access points that provide Internet access are widely available in public places such as coffee shops, libraries, bookstores, colleges, and universities.
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| (hypertext transfer protocol secure) | show 🗑
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| hub | show 🗑
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| show | uses infrared light waves to communicate over short distances. Like microwave transmissions, infrared is a line-of-sight communication.
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| intranet | show 🗑
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| show | work with firewalls to protect an organization’s network.
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| show | Every computer on the Internet has a unique numeric address
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| show | Networks with nodes that are in close physical proximity—within the same building
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| LTE (Long Term Evolution) | show 🗑
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| show | is used in special leased lines to connect midrange computers and mainframes as well as to transmit data over long distances.
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| megabits per second (Mbps) | show 🗑
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| show | this topology is the newest type and does not use a specific physical layout (such as a star or a tree). Rather, the mesh network requires that each node have more than one connection to the other nodes.
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| metropolitan area network (MAN) | show 🗑
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| microwave | show 🗑
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| show | is short for modulator-demodulator.
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| show | is the name of the process of converting from digital to analog
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| show | a computer specialist responsible for efficient network operations and implementation of new networks.
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| show | describes how a network is arranged and how resources are coordinated and shared.
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| show | is a device that allows one LAN to be linked to other LANs or to larger networks. For example, the LAN of one office group may be connected to the LAN of another office group.
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| network interface card (NIC) | show 🗑
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| network operating system (NOS) | show 🗑
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| show | any device that is connected to a network. It could be a computer, printer, or data storage device.
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| optical carrier (OC) | show 🗑
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| packet | show 🗑
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| peer-to-peer (P2P) network | show 🗑
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| show | is a type of wireless network that works within a very small area—your immediate surroundings.
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| show | rules for exchanging data between computers are known as
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| show | All communications between the company’s internal networks and the outside world pass through this server.
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| ring network | show 🗑
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| show | a node that forwards or routes data packets from one network to their destination in another network.
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| show | communication uses satellites orbiting about 22,000 miles above the earth as microwave relay stations
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| show | use satellites to provide wireless connections. While slower than DSL and cable modem, satellite connections are available almost anywhere using a satellite-receiving disk.
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| show | a node that shares resources with other nodes. Dedicated servers specialize in performing specific tasks. Depending on the task may be called an application server, communication server, database server, file server, printer server, or web server.
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| show | each device is connected directly to a central network switch.
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| strategy | show 🗑
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| show | central node that coordinates the flow of data by sending messages directly between sender and receiver nodes.
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| show | large corporations have been leasing special high-speed lines from telephone companies. Originally, these were copper lines
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| T3 | show 🗑
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| show | Use twisted pairs
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| topology | show 🗑
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| transfer rate | show 🗑
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| show | like is another widely used Internet protocol
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| show | each device is connected to a central node, either directly or through one or more other devices.
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| show | consists of pairs of copper wire that are twisted together. Both standard telephone lines and Ethernet cables use
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| uplink | show 🗑
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| virtual private network (VPN) | show 🗑
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| show | also known as low bandwidth, is used for standard telephone communication. Personal computers with telephone modems and dial-up service use this bandwidth, also known as low bandwidth.
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| show | are countrywide and worldwide networks. These networks provide access to regional service (MAN) providers and typically span distances greater than 100 miles. They use microwave relays and satellites to reach users over long distances
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| Wi-Fi (wireless fidelity) | show 🗑
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| WiMax (Worldwide Interoperability for Microwave Access) | show 🗑
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| wireless access point | show 🗑
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| show | uses radio frequencies to connect computers and other devices.
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| show | also known as a WWAN (wireless wide area network) modem. Almost all computers today have built-in wireless modems. For those that do not, wireless adapter cards are available that plug into USB or special card ports.
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