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






2. The GUI environment for UNIX and Linux systems.






3. A type of object recognized by an NOS directory and defined in an NOS schema.






4. A form of filename substitution - similar to the use of wildcards in Windows and DOS.






5. A protocol used between media gateway controllers and media gateways. It is poised to replace MGCP on modern converged networks - as it supports a broader range of network technologies - including ATM. Also known as H.248.






6. 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.






7. 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.






8. A type of satellite Internet access service in which a subscriber sends and receives data to and from the Internet over the satellite link. This is a symmetrical technology - in which both upstream and downstream throughputs are advertised to reach 4






9. A unique character string used to identify an access point on an 802.11 network.






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






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






12. 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






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






14. The organization of files and directories (or folders) on a disk in which directories may contain files and other directories. When displayed graphically - this organization resembles a treelike structure.






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






16. 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






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






18. A companion protocol to RTP - defined in RFC 3550 by the IETF - RTCP provides feedback on the quality of a call or videoconference to its participants.






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






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






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






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






23. 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






24. 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.






25. In the context of 802.11n wireless technology - the combination of two 20-MHz frequency band to create one 40-MHz frequency band that can carry more than twice the amount of data that a single 20-MHz band could. It's recommended for use only in the 5






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






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






28. A wireless signaling technique in which a signal jumps between several different frequencies within a band in a synchronization pattern known to the channel's receiver and transmitter.






29. 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.






30. 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






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 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).






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






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






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






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






37. A record of a user that contains all of her properties - including rights to resources - password - user name - and so on.






38. 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).






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






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






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






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






43. 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.






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






45. 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.






46. In the context of 802.11n wireless networking - the ability for access points to issue multiple signals to stations - thereby multiplying the signal's strength and increasing their range and data-carrying capacity.






47. The term used to describe the recently released standards for highthroughput - long-distance digital data exchange over wireless connections.






48. 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).






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






50. 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.