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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.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. A type of satellite that orbits the Earth roughly 6000 to 12 -000 miles above its surface - positioned between the equator and the poles. These satellites can cover a larger area of the Earth's surface than LEO satellites while using less power and c






2. A type of software license that - for a fixed price - allows any number of users in one location to legally access a program.






3. A command-line utility for viewing and setting wireless interface parameters on Linux and UNIX workstations.






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






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






6. 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.






7. A means of collectively managing users' permissions and restrictions applied to shared resources.






8. An area covered by a wireless access point that provides visitors with wireless services - including Internet access.






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






10. A file on the hard drive that is used for virtual memory.






11. A long form of an object's name in Active Directory that explicitly indicates the object name - plus the names of its containers and domains. It includes a DC (domain component) - OU (organizational unit) - and CN (common name).






12. The process a wireless station undergoes to find an access point.






13. A type of server on a Windows Server 2003 or Server 2008 network that does not hold directory information and - therefore - cannot authenticate users.






14. The signals made of electromagnetic energy that travel through the atmosphere.






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






16. The software that sits between the client and server in a 3-tier architecture.






17. An access point that provides routing functions and is used as a gateway.






18. A service that relies on a DSL connection to transmit packetized voice signals.






19. On a SIP network - a server that maintains a database containing information about the locations (network addresses) of each user agent in its domain. When a user agent joins a SIP network - it transmits its location information to the SIP registrar






20. A method of multiprocessing that splits all operations equally among two or more processors.






21. A network access method used on 802.11 wireless networks. In it - before a node begins to send data it checks the medium. If it detects no transmission activity - it waits a brief - random amount of time - and then sends its transmission. If the node






22. 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.






23. A Windows Server 2003 or Server 2008 computer that contains a replica of the Active Directory database.






24. A device used on wireless LANs that transmits and receives wireless signals to and from multiple nodes and retransmits them to the rest of the network segment. Those can connect a group of nodes with a network or two networks with each other. They ma






25. The GUI environment for UNIX and Linux systems.






26. A nonprofit industry association that owns the UNIX trademark.






27. A proprietary implementation of the UNIX system distributed by IBM.






28. A service that transmits faxes over a TCP/IP network.






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






30. 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.






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






32. In the context of wireless networking - a frame issued by an access point to alert other nodes of its existence.






33. A customizable - graphical network management interface introduced with Windows Server 2003 and incorporated in Window Server 2008's Server Manager.






34. The RAM chips installed on the computer's system board that provide dedicated memory to that computer.






35. 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.






36. On a SIP network - a server that accepts and responds to requests from user agents and SIP proxy servers for location information on recipients that belong to external domains.






37. 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.






38. A type of satellite that orbits the Earth with an altitude between 100 and 900 miles - closer to the Earth's poles than the orbits of either GEO or MEO satellites.






39. A Session layer call signaling protocol defined as part of ITU's H.323 multiservice network architecture. It is responsible for call or videoconference setup between nodes on a VoIP or video-over-IP network - indicating node status - requesting addit






40. A type of wireless transmission in which lower-level signals are distributed over several frequencies simultaneously.






41. A GUI tool provided with Windows Server 2008 that enables network administrators to manage server roles - features - resources - and users from a single interface.






42. 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






43. A character that enables you to combine existing commands to form new commands.






44. The characteristic of wireless signals that follow a number of different paths to their destination (for example - because of reflection - diffraction - and scattering).






45. The process of copying Active Directory data to multiple domain controllers. This ensures redundancy so that in case one of the domain controllers fails - clients can still log on to the network - be authenticated - and access resources.






46. A routine of sequential instructions that runs until it has achieved its goal.






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






48. The nerve center for networks that adhere to H.323. IT authorize and authenticate terminals and gateways - manage bandwidth - and oversee call routing - accounting - and billing.






49. The exchange of information between the components of a network or system for the purposes of establishing - monitoring - or releasing connections as well as controlling system operations.






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







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