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 transmission in which signals travel over a single frequency or within a specified frequency range.






2. 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






3. 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.






4. A service in which video signals are compressed and delivered over the Internet in a continuous stream so that a user can watch and listen even before all the data has been transmitted.






5. A consortium of companies - including Sony Ericsson - Intel - Nokia - Toshiba - and IBM - that formally banded together in 1998 to refine and standardize Bluetooth technology.






6. 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






7. Another term for the UNIX command interpreter.






8. 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






9. 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.






10. On a network following the H.323 standard - any node that provides audio - visual - or data information to another node.






11. In LDAP naming conventions - the name of an object.






12. 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.






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






14. 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






15. A UNIX or Linux file system information storage area that holds all details about a file. This information includes the size - the access rights - the date and time of creation - and a pointer to the actual contents of the file.






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






17. A cost-savings benefit that results from organizations completing long-distance telephone calls over their packet-switched networks - thus bypassing tolls charged by common carriers on comparable PSTN calls.






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






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






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






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






23. In the DiffServ QoS technique - a forwarding specification that assigns each data stream a minimum departure rate from a given node. This technique circumvents delays that slow normal data from reaching its destination on time and in sequence.






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






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






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






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






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






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






30. 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.






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






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






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






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






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






36. 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.






37. 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).






38. The preferred Active Directory naming convention for objects when used in informal situations. This name looks like a familiar Internet address - including the positioning of the domain name after the @ sign.






39. 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






40. The process of making a disk partition available.






41. In 802.11 wireless networking - a type of frame issued by a station during active scanning to find nearby access points.






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






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






44. A service that runs on a client workstation and determines whether the client's request should be handled by the client or the server.






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






46. 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






47. A Session layer control protocol defined as part of ITU's H.323 multiservice network architecture. It is responsible for controlling a session between two nodes. For example - it ensures that the two nodes are communicating in the same format.






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






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






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