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LSU Computer Terms in this set (87)Communications describes a process in which two or more computers or devices transfer data, instructions, and information (sending device > communications channel > receiving device) Blogs, Chat rooms, e-mail, fax, FTP, instant messaging, internet, newsgroups, RSS, video conferencing, VoIP, Web, Web 2.0, Web folders, Wikis Uses of computer communications: wireless messaging services Users can send and receive wireless messages using ____________ Text messaging (SMS) allows users to send and receive short text messages on a phone or other mobile device or computer Picture messaging allows users to send pictures and sound files Video messaging allows users to send short video clips real-time messages Wireless instant messaging allows wireless users to exchange ________ with one or more other users Wireless Internet Access Points allow people to connect wirelessly to the internet from home, work, school, and many public locations Cybercafe a coffeehouse, restaurant, or other location that provides personal computers with internet access to its customers global positioning system (GPS) a navigation system that consists of one or more earth-based receivers that accept and analyze signals sent by satellites in order to determine the GPS receiver's geographic location built into many mobile devices, available as a handheld device, and available with new vehicles GPS receivers are: Groupware Helps groups of people work together on projects and share information over a network. Component of workgroup computing. Major feature is group scheduling. Voice mail Allows someone to leave a voice message for one or more people. Computer in voice mail system converts an analog voice message into digital form. A voice mailbox is a storage location on a hard disk in the voice mail system. Collaborate Many programs provide a means to _____, or work online, with other users to a server. Collaboration Software includes tools that enable users to share documents via online meetings and communicate with other connected users (Online meetings, web conferences, document management systems) Web services enable programmers to create applications that communicate with other remote computers over the internet or on an internal business network Mashup a web application that combines services from two or more sources Network a collection of computers and devices connected together via communications devices and transmission media facilitating communications, sharing hardware, sharing data and information, sharing software, and transferring funds Advantages of a network include: Local area network (LAN) a network that connects computers and devices in a limited geographical area Metropolitan Area Network (MAN) connects LAN's in a metropolitan area Wide area network (WAN) a network that covers a large geographical area network architecture The design of computers, devices, and media on a network is sometimes called the ________ P2P describes an internet network on which users access each other's hard disks and exchange files directly over the internet Network topology refers to the layout of the computers and devices in a communications network
Intranet an internal network that uses internet technologies extranet allows customers or suppliers to access part of its intranet Ethernet a network standard that specifies no computer controls when data can be transmitted token ring standard specifies that computers and devices on the network share or pass a special signal (token) TCP/IP a network standard that defines how messages are routed from one end of a network to another Wi-Fi identifies any network based on the 802.11 standard that facilitates wireless communication. Sometimes referred to as wireless Ethernet Bluetooth defines how two bluetooth devices use short-range radio waves to transmit data UWB (ultra-wideband) specifies how two UWB devices use short-range radio waves to communicate at high speeds IrDA transmits data wirelessly via infrared (IR) light waves RFID uses radio signals to communicate with a tag placed in or attached to an object, animal, or person WiMAX (802.16) developed by IEEE, towers can cover a 30-mile radius, two types are fixed wireless and mobile wireless, provides wireless broadband internet access Wireless Application Protocol (WAP) Specifies how some mobile devices can display the content of internet services (web, e-mail, chat rooms), uses a client/server network. Communications software consists of programs that: help users establish a connection to another computer or network. Manage transmission of data, instructions, and information. Provide an interface for users to communicate with one another. Public switched telephone network (PSTN) the worldwide telephone system dial-up lines, dedicated line, ISDN line, DSL, FTTP, T-carrier line, ATM Communications over the telephone network: ADSL connections transmit data downstream at a much faster rate than upstream communications device any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device. dial-up modem converts signals between analog and digital digital modem sends and receives data and information to and from a digital line (DSL modem and cable modem) wireless modem uses the cell phone network to connect to the internet wirelessly from a notebook computer, a smart pone, or other mobile device network card enables a computer or device to access a network. available in a variety of styles. wireless network cards often have an antenna wireless access point a central communications device that allows computers and devices to transfer data wirelessly among themselves or to a wired network router connects multiple computers or other routers together and transmits data to its correct destination on a network. many are protected by a hardware firewall hub or switch connects several devices in a network together home networks provide computers with the following capabilities: connect to the internet at the same time, share a single high-speed internet connection, access files and programs on other computers, share peripherals, play multiplayer games, connect game consoles to the internet, and subscribe to and use VoIP ethernet, powerline cable, and phoneline Types of wired home networks: bandwidth The amount of data that can travel over a communications channel sometimes is called the ______ latency the time it takes a signal to travel from one location to another on a network transmission media carries one or more signals broadband media transmit multiple signals simultaneously Cellular radio a form of broadcast radio that is used widely for mobile communications microwaves are radio waves that provide a high-speed signal transmission communications satellite a space station that receives microwave signals from an earth-based station, amplifies it, and broadcasts the signal over a wide area True A communications channel is a media on which data, instructions, or information travel. False With video messaging, users can send short video clips, usually about 15 minutes, in addition to all picture messaging services True A network is a collection of computers and devices connected together via communication devices and transmission media False A local area network (LAN) is a network that covers a large geographic area using a communications channel that combines many types of media such as telephone lines, cables, and radio waves. True A Web server is a computer the delivers requested Web pages to your computer True An intranet is an internal network that uses Internet technologies False The 40-gigabit Ethernet standard is the fastest of the Ethernet standards True Bluetooth does not require line-of-sight transmission False At distances of 10 meters (about 33 feet), the data transfer rate for UWB devices is 480 Mbps. True Fiber to the Premises (FTTP) uses fiber-optic cable to provide extremely high-speed Internet access to a user's physical permanent location True Latency is the time it takes a signal to travel from one location to another on a network Visual Voice Mail With _____, user can view message details such as the length of calls and, in some cases, read message contents instead of listening to them a Web Conference When an online meeting takes place on the Web, it is called ______ provides for storage and management of a company's documents A document management system _______ Mashup A _____ is a Web application that combines services from two or more sources, creating a new application Hubs and Switches
___ are devices that provide a common central connection point for nodes on the network RFID ____ is a standard, specifically a protocol, that defines how a network uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person Coaxial Cable ____ consists of a single copper wire surrounded by at least three layers. Mobile TV ____ is a service that provides television programs over the cellular network Dial-up Modem communications device that can convert digital signals to analog signals and analog signals to digital signals, so that data can travel along an analog telephone line Bandwidth amount of data, instructions, and information that can travel over a communications channel Transmission Media materials or substances capable of carrying one or more signals IrDA Specification to transmit data wirelessly among computers and devices via infrared light waves Picture Messaging allows user to send pictures and sound files as well as short text messages, to a phone or other mobile device, or computer Digital Modem Service that carries voice, data, videos, and multimedia at very high speeds ATM Communications device that sends and receives data and information to and from a digital line extranet allows customers or suppliers to access part of a company's intranet noise electrical disturbance that can degrade communications groupware Software that helps groups of people share information over a network Recommended textbook solutions Computer Organization and Design MIPS Edition: The Hardware/Software Interface5th EditionDavid A. Patterson, John L. Hennessy 220 solutions
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Is latency A RTT?Latency is the time it takes for a packet to go from the sending endpoint to the receiving endpoint. Many factors may affect the latency of a service. Latency is not explicitly equal to half of RTT, because delay may be asymmetrical between any two given endpoints. RTT includes processing delay at the echoing endpoint.
What is latency in communication?Network latency, sometimes called lag, is the term used to describe delays in communication over a network. Latency meaning in networking is best thought of as the amount of time it takes for a packet of data to be captured, transmitted, processed through multiple devices, then received at its destination and decoded.
What is the meaning of round trip delay?In telecommunications, round-trip delay (RTD) or round-trip time (RTT) is the amount of time it takes for a signal to be sent plus the amount of time it takes for acknowledgement of that signal having been received. This time delay includes propagation times for the paths between the two communication endpoints.
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The time it takes a signal to travel from one location to another on a network is referred to as:
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