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. 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.






2. An object in an operating system's directory - such as a printer or user - that does not contain other objects.






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






4. A 128-bit number generated and assigned to an object upon its creation in Active Directory.






5. 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






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






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






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






9. 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






10. 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.






11. In IEEE terminology - the identifier for a BSS (basic service set).






12. 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.






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






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






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






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






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






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






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






20. The centralized management of multiple types of network-based communications - such as voice - video - fax - and messaging services.






21. 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.






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






23. 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).






24. Another term for the UNIX command interpreter.






25. 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






26. 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.






27. 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






28. 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.






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






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






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






32. 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.






33. A connection from an orbiting satellite to an Earth-based receiver.






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






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






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






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






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






39. 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






40. A type of permission - or right - that is passed down from one group (the parent) to a group within that group (the child).






41. An ITU standard that describes an architecture and a suite of protocols for establishing and managing multimedia services sessions on a packet-switched network.






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






43. 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.






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






45. 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.






46. A UNIX distribution that originated at the University of California at Berkeley.






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






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






49. In Microsoft terminology - a group of interconnected computers that share each others' resources without relying on a central file server.






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