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 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.






2. The GUI environment for UNIX and Linux systems.






3. The computer instructions written in a programming language that is readable by humans.






4. 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






5. The signals made of electromagnetic energy that travel through the atmosphere.






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






7. The IEEE standard for a wireless networking technique designed to be compatible with 802.11b while using different encoding techniques that allow it to reach a theoretical maximum capacity of 54 Mbps. It uses the 2.4-GHz frequency band.






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






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






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






11. A highly privileged user ID that has all rights to create - delete - modify - move - read - write - or execute files on a UNIX or Linux system.






12. A technique for ensuring QoS by prioritizing traffic.






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






14. The name of the primary file system used in most Linux distributions.






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






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. The name given to the public software project to implement a complete - free source code implementation of UNIX. It also refers to the collection of UNIX-inspired utilities and tools that are included with Linux distributions.|






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






19. 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.






20. 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.






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






22. The process of copying Active Directory data to multiple domain controllers. This ensures redundancy so that in case one of the domain controllers fails - clients can still log on to the network - be authenticated - and access resources.






23. 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.






24. 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).






25. 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.






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






27. 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.






28. 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.






29. 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






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






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






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






33. 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.






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






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 wireless signal or path that travels directly in a straight line from its transmitter to its intended receiver.






37. 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.






38. In the context of Windows Server 2003 or Server 2008 - a collection of domain trees that use different namespaces. It allows for trust relationships to be established between trees.






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






40. A proprietary NOS from Apple Computer that is based on a version of UNIX.






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






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






43. A program (usually text-based) that accepts and executes system programs and applications on behalf of users. Often - it includes the ability to execute a series of instructions that are stored in a file.






44. The exchange of information between the components of a network or system for the purposes of establishing - monitoring - or releasing connections as well as controlling system operations.






45. A computer that manages multiple media gateways and facilitates the exchange of call control information between these gateways.






46. A service in which television signals from broadcast or cable networks travel over packet-switched networks.






47. A freely distributable implementation of a UNIX-type of system. Finnish computer scientist Linus Torvalds originally developed it.






48. An end node on a network; used most often in the context of wireless networks. transponder






49. 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.






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