CSC Final Exam Questions and Answers

CSC Final Exam Questions and Answers storage devices from the most expensive to least expensive RAM, hard disk, optical disk, tape computer communication process in which two or more computers or devices transfer data, instructions, and information Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More LAN a network in limited geographical area such as home or office building WAN network that covers large geographic areas MAN smaller area than WAN, but connects LANs in city or town 3 different types of network topology bus, star, & ring Bus network Advantages •devices can be attached at any point without disturbing other devices •failure of one device does not affect the network Disadvantage •total network depends upon the bus Ring Network Advantage •can span larger distance than a bus network Disadvantages •failure of a device affects the network performance •data might have to travel through redundant path Star Network Advantages •nodes can be added to the network with no disturbance to the network •Failure of a node does not affect the network Disadvantage •whole network depends on the hub/ switch client-server network •efficient for 10 or more computers •ex: LSU website Peer-to-peer network •simple network that connects fewer than 10 computers •ex: bittorent communication protocols rules on how devices communicate with each other 4 examples of communication protocols token ring, Ethernet, TCP/ IP, and PSTN Bitrate •bits per seconds •higher bit rates yield better quality Bandwidth amount data that can travel over a media PSTN worldwide telephone system that handles voice-oriented telephone calls DBMS •provides several tools that allow users and programs to retrieve and maintain data in the database •provides means to ensure that only authorized users access data at permitted times •provides a variety of techniques to restore that database to a usable form in case it is damaged or destroyed examples of DMBS backup, log, and recovery utility field a combination of one or more related characters record a group of related fields file a collection of related records validation compares data with a set of rules to find out if the data is correct