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Comptia Network + Wireless NOS Voip

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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 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.






2. A portion of the kernel that you can load and unload to add or remove functionality on a running UNIX or Linux system.






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






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






5. The diffusion of a wireless signal that results from hitting an object that has smaller dimensions compared to the signal's wavelength.






6. A type of phone that includes a screen and can decode compressed video and interpret transport and signaling protocols necessary for conducting videoconference sessions.






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






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






9. The real-time reception and transmission of images and audio among two or more locations.






10. A licensing mode that allows a fixed quantity of clients to use one software package simultaneously.






11. The technique of splitting tasks among multiple processors to expedite the completion of any single instruction.






12. The provision of telephone service over a packet-switched network running the TCP/IP protocol suite.






13. A logical representation of multiple - hierarchical levels in a directory.






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






15. In the context of applications - a licensing mode that limits access to an application to specific users or workstations.






16. A method of satellite Internet access in which a subscriber receives data via a satellite downlink transmission - but sends data to the satellite via an analog modem (dialup) connection.






17. 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.






18. 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






19. The provision of telephone service over the Internet.






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






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. 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






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






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






25. Currently - the most popular version of WiMAX. IEEE improved the mobility and QoS characteristics of the technology - making it better suited to VoIP and mobile phone users.






26. In SIP terminology - a server that responds to user agent clients' requests for session initiation and termination.






27. A special identifier shared by BSSs that belong to the same ESS.






28. A group of access points and associated stations (or basic service sets) connected to the same LAN.






29. The ability of a processor to perform multiple activities in a brief period of time (often seeming simultaneous to the user






30. A file access protocol. It runs over TCP/IP and is the standard file access protocol used by Windows operating systems.






31. The type of multitasking in which tasks are actually performed one at a time - in very brief succession. One program uses the processor for a certain period of time - then is suspended to allow another program to use the processor.






32. In the context of wireless networking - an assessment of client requirements - facility characteristics - and coverage areas to determine an access point arrangement that will ensure reliable wireless connectivity within a given area.






33. 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.






34. The capability for operating multiple logical servers






35. In the context of wireless networking - the communication that occurs between a station and an access point to enable the station to connect to the network via that access point.






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






37. A gateway that can translate IP fax data into analog fax data and vice versa.






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






39. A UNIX command that places files in the printer queue.






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






41. A protocol suite codified by the IETF (in RFC 2543) as a set of Session layer signaling and control protocols for multiservice - packet-based networks.






42. A version of Linux packaged and distributed by Red Hat.






43. A collection of H.323 terminals - gateways - and MCUs that are managed by a single H.323 gatekeeper.






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






45. 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.






46. A service that uses the ATM network access method (and ATM cells) to transmit voice signals over a network.






47. A type of trust relationship in which two domains that belong to different NOS directory trees are configured to trust each other.






48. A computer that provides support for multiple H.323 terminals (for example - several workstations participating in a videoconference) and manages communication between them.






49. The term used to describe software that is distributed with few restrictions and whose source code is freely available.






50. A continuum of electromagnetic waves used for data and voice