Test your basic knowledge |

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 private switch that accepts and interprets both analog and digital voice signals (although some IP-PBXs do not accept analog lines). It can connect with both traditional PSTN lines and data networks. |






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






3. 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).






4. 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.






5. 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.






6. A type of wireless transmission in which signals travel over a single frequency or within a specified frequency range.






7. 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.






8. A type of antenna that issues and receives wireless signals with equal strength and clarity in all directions. This type of antenna is used when many different receivers must be able to pick up the signal - or when the receiver's location is highly m






9. A streaming video - either on demand or live - that is delivered via the Web.






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






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






12. 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).






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






14. A logical receptacle for holding objects with similar characteristics or privileges in an NOS directory. Containers form the branches of the directory tree.






15. The process of moving blocks of information - called pages - between RAM and into a page file on disk.






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






17. The geographical area in which signals issued from an antenna or wireless system can be consistently and accurately received.






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






19. In IEEE terminology - a group of stations that share an access point.






20. A multiprocessing method that assigns each subtask to a specific processor.






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






22. In the context of wireless networking - the process of a station establishing a connection (or associating) with a different access point.






23. A popular remote file system created by Sun Microsystems - and available for UNIX and Linux operating systems.






24. The relative strength over a three-dimensional area of all the electromagnetic energy an antenna sends or receives.






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






26. A LAN that uses wireless connections for some or all of its transmissions.






27. A wireless networking standard that uses FHSS (frequency hopping spread spectrum) signaling in the 2.4-GHz band to achieve a maximum throughput of either 723 Kbps or 2.1 Mbps - depending on the version. IT was designed for use primarily with small of






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






29. A type of wireless LAN in which stations communicate directly with each other (rather than using an access point).






30. A group of users - servers - and other resources that share account and security policies through a Windows Server 2003 or Server 2008 NOS.






31. 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.






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






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






34. 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).






35. In Microsoft terminology - the type of client/server network that relies on domains - rather than workgroups.






36. 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.






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






38. The IEEE standard for a wireless networking technique that may issue signals in the 2.4- or 5-GHz band and can achieve actual data throughput between 65 and 600 Mbps. It accomplishes this through several means - including MIMO - channel bonding - and






39. A UNIX service responsible for printing files placed in the printer queue by the lpr command.






40. The brand of computer central processing unit invented by Apple Computer - IBM - and Motorola - Inc. - and used in IBM servers.






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






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






43. The IEEE standard for a wireless networking technique that uses DSSS (directsequence spread spectrum) signaling in the 2.4-2.4835-GHz frequency range (also called the 2.4-GHz band). It separates the 2.4-GHz band into 14 overlapping 22-MHz channels an






44. In the context of wireless - the phenomenon that occurs when an electromagnetic wave encounters an obstacle and bounces back toward its source.






45. 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.






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






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






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






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






50. A representation of a thing or person associated with the network that belongs in the NOS directory.