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Comptia Network + Wireless NOS Voip

Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The brand of computer central processing unit invented by Apple Computer - IBM - and Motorola - Inc. - and used in IBM servers.






2. A computer that manages multiple media gateways and facilitates the exchange of call control information between these gateways.






3. The proprietary version of UNIX that comes from Bell Labs.






4. A service in which a video stored as an encoded file is delivered to a viewer upon his request.






5. The IEEE standard for a wireless networking technique designed to be compatible with 802.11b while using different encoding techniques that allow it to reach a theoretical maximum capacity of 54 Mbps. It uses the 2.4-GHz frequency band.






6. A type of wireless system in which the locations of the transmitter and receiver are static.






7. A transmission technique in which a signal's bits are distributed over an entire frequency band at once. Each bit is coded so that the receiver can reassemble the original signal upon receiving the bits.






8. An area of a computer's hard drive that is logically defined and acts as a separate disk drive.






9. A well-defined - self-contained subset of a process. U






10. The core of a UNIX or Linux system. This part of the operating system is loaded and run when you turn on your computer. It mediates between user programs and the computer hardware.






11. The IEEE standard for a wireless networking technique that uses multiple frequency bands in the 5-GHz frequency range and provides a theoretical maximum throughput of 54 Mbps.






12. An ITU standard that describes an architecture and a suite of protocols for establishing and managing multimedia services sessions on a packet-switched network.






13. A connection from an Earth-based transmitter to an orbiting satellite.






14. The action of associating a disk - directory - or device with a drive letter.






15. An operating system's method of organizing - managing - and accessing its files through logical structures and software routines.






16. A computer configured to act like an IP telephone. SS7 (Signaling System 7) | A set of standards established by the ITU for handling call signaling on the PSTN (public switched telephone network).






17. A pictorial representation of computer functions and elements that - in the case of NOSs - enables administrators to more easily manage files - users - groups - security - printers - and other issues.






18. A change in a wireless signal's strength as a result of some of the electromagnetic energy being scattered - reflected - or diffracted after being issued by the transmitter.






19. A type of WLAN in which stations communicate with an access point and not directly with each other.






20. The process of making a disk partition available.






21. As specified in RFC 2205 - a QoS technique that attempts to reserve a specific amount of network resources for a transmission before the transmission occurs.






22. A wireless signal or path that travels directly in a straight line from its transmitter to its intended receiver.






23. Any type of video service - including IPTV - videoconferencing - and streaming video - that delivers video signals over packet-switched networks using the TCP/IP protocol suite.






24. The online documentation for any variety of the UNIX operating system. This documentation describes the use of the commands and the programming interface.






25. A client/server environment that uses middleware to translate requests between the client and server.






26. A proprietary implementation of the UNIX operating system by Sun Microsystems.






27. An IEEE standard for wireless MANs. Its networks may use frequencies between 2 and 66 GHz. Their antennas may operate in a line-of-sight or non-line-of-sight manner and cover 50 kilometers (or approximately 30 miles). Its connections can achieve a ma






28. The capability for operating multiple logical servers






29. In the context of wireless signal propagation - the phenomenon that occurs when an electromagnetic wave encounters an obstruction and splits into secondary waves. The secondary waves continue to propagate in the direction in which they were split. Th






30. A small (usually home) network composed of personal communications devices.






31. In the context of IPTV - a device that decodes digital video signals and issues them to the television.






32. On a network following the H.323 standard - a gateway that provides translation between network devices running H.323 signaling protocols and devices running other types of signaling protocols (for example - SS7 on the PSTN).






33. A protocol for communications and resource access between systems - such as clients and servers.






34. An exchange in which a wireless station requests the exclusive right to communicate with an access point and the access point confirms that it has granted that request.






35. In general - a listing that organizes resources and correlates them with their properties. In the context of NOSs - a method for organizing and managing objects.






36. In SIP terminology - end-user devices such as workstations - PDAs - cell phones - or IP telephones. It initiates a SIP connection.






37. A series of two or more commands in which the output of prior commands is sent to the input of subsequent commands.






38. A part of the organizational structure of an operating system's directory that contains objects or other organizational units.






39. A variable property associated with a network object. For example - a restriction on the time of day a user can log on is an attribute associated with that user object.






40. Any implementation of UNIX for which the source code is either unavailable or available only by purchasing a licensed copy from Novell (costing as much as millions of dollars).






41. In wireless networking - the process that describes a station moving between BSSs without losing connectivity.






42. The GUI environment for UNIX and Linux systems.






43. The description of object types - or classes - and their required and optional attributes that are stored in an NOS's directory.






44. A telephone switch used to connect calls within a private organization.






45. A program (usually text-based) that accepts and executes system programs and applications on behalf of users. Often - it includes the ability to execute a series of instructions that are stored in a file.






46. The complete database of hierarchical names (including host and domain names) used to resolve IP addresses with their hosts.






47. In Microsoft terminology - the primary purpose of a Windows Server 2008 server.






48. A type of antenna that issues wireless signals along a single direction - or path.






49. A method used by wireless stations to detect the presence of an access point. The station issues a probe to each channel in its frequency range and waits for the access point to respond.






50. In the DiffServ QoS technique - a forwarding specification that allows routers to assign data streams one of several prioritization levels.







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