Networking Quiz4

You have decided to establish a VoIP system in your home. Which of the following devices is necessary to connect your analog telephone to your VoIP server?
Skype, the popular Internet telephony service provides a user with what type of interface?
Toll bypass
A company’s use of VoIP on its WAN to avoid long-distance telephone charges is known as:
Which of the following is the most popular signaling protocol used on traditional, circuit-switched PSTN connections?
Streaming video
Watching a YouTube video on the web is an example of the following types of video-over IP services
Decodes video signals and issues them to a television
In an IPTV system, which of the following functions does a set-top box perform?
what type of video over IP service relies on full duplex communication?
what protocol manages addressing for multicast groups?
which of the following protocols would be used by a video bridge to invite a video phone o join a videoconference
you are using a softphone to initiate a videa call with a friend in another state. WHich of the following protocols is generating segments at the Transport Layer of this transmission?
handles call setup, call routing, and call termination
what function does the H.225 protocol provide, as part of the H.323 VoIP specifications?
registrar server
in SIP, which of the following network elements maintains a database with network address information for every SIP client?
SIP messages use fewer processing resources
which of the following are reasons for choosing SIP over H.323?
which of the following devices enable multiple media gateways to communicate
at what layer of the OSI model does RTP operate
report on the degree of packet loss and delay in connection
what can RTCP do that RTP cannot
it establishes a path btw the sender and the receiver
how does RSVP help improve QoS
the traffic class field in an IPv6 datagram serves the same function as which of the following fields in an IPv4 datagram
expedited forwarding
on a VoIP network that uses the DiffServ QoS technique, which of the following makes certain that a router forwards packets within a given time period
assured forwarding (AS)
in the DiffServ QoS technique a forwarding specification that allows routers to assign data streams one of several prioritization
analog telephone adapter(ATA)
an internal or externally attached adapter that converts analog telephone signals into packet-switched voice signals and vice versa
differentiated service (DiffServ)
technique ensuring QoS by prioritizing traffic
any client, server, or gateway communicating on the network
an ITU standard that describes an architecture and a suite of protocols for establishing and managing multimedia services sessions on a packet switched network
internet telephony
the provision of telephone service over the internet
multipoint control unit (MCU)
a computer that provides support for multiple H.323 terminals and manages communication btw them
media gateway
gateway capable of accepting connections from multiple devices and translating analog signals into packetized, digital signals, and vice versa
protocol used btw media gateway controllers and media gateways
private branch exchange (PBX)
a telephone switch used to connect and manage an organizations voice calls
redirect server
a server that accepts requests for location info from user agents, then queries he nearest registrar server on behalf of those user agens
Resource reservation protocol (RSVP)
a QoS technique that attempts to reserve a specific amount of network resources for a transmission before the transmission occurs
set top box
a device that decodes digital video signals and issues them to the television
session initiation protocol (SIP)
an application layer signaling and control protocol for multiservice
a computer configured o act like an IP telephone
signaling system 7 (SS7)
set of standards established by the ITU for handling call signaling on the PSTN
toll bypass
a cost-saving benefit that results from organizations completing long distance telephone calls over their packet switched networks
Voice over IP (VoIP)
the provision of telephone service over a packet-switched network running he TCP/IP protocol suite
butt set
a tool for accessing and testing a telephone company’s local loop
cable performance tester
a troubleshooting tool that tests cables for continuity, but can also measure cross talk, attenuation and impedance
cable tester
a device that tests cables for continuity, segment length, distance to a fault, attenuation along cables
call tracking system
a software program used to document technical problems and how they were resolved
change management system
a process of program that provides support personnel with a centralized means of documenting changes made to the network
continuity tester
an instrument that tests whether voltage issued at one end of a cable can be detected at the opposite end of the cable
a frame that is not actually a data frame, but rather an aberration caused by a device misinterpreting stray voltage on the wire
a device that handles electrical signals improperly, usually affecting the rest of the network
late collision
collision that takes place outside the normal window in which collisions are detected
local collision
collision that occurs when two or more stations are transmitting simultaneously
instrument that can measure multiple characteristics of an electric circuit, including resistance and voltage
negative frame sequence check
the result of the CRC generated by the originating node not matching the checksum calculated from the data received
network monitor
software-based tool that monitors traffic on the network from a server or workstation attached to the network
a device used to measure resistance in an electrical circuit
optical time domain reflector (OTDR)
a performance testing device for use with fiber-optic networks
promiscuous mode
the feature of a network adapter that allows it to pick up all frames that pass over the network
protocol analyzer
a software package or hardware-based tool that can capture an analyze data on a network
spectrum analyzer
a tool that assesses the characteristics of wireless signals
time domain reflector
a high end instrument for testing the qualities of a cable
tone generator
a small electronic device that issues a signal on a wire pair
tone locator
a small electronic device that emits a one when it detects electrical activity on a wire pair
voltage event
any condition in which voltage exceeds or drops below predefined levels
a device used to measure voltage on an electrical circuit
backup rotation scheme
a plan for when and how often backups occur and which backups are full, incremental or differential
boot sector virus
a virus that resides on the boot sector of an external storage device and is transferred to the partition sector or the DOS boot sector on a hard disk when the machine starts
a program that runs automatically
common address redundancy protocol (CARP)
a protocol that allows a pool of computers or interfaces to share on or more IP addresses
a fault-tolerance technique that links multiple servers to act as a single server
cold site
a place where the computers, devices, and connectivity necessary to rebuild a network exist, but they are not appropriately configured, updated or connected to match the network’s current state
cold spare
a duplicate component that is not installed, but can be installed in case of failure
differential backup
a backup method in which only data that has changed since the last full or incremental backup is copied to a storage medium, and in which that same info is marked for subsequent backup regardless of whether it has changed or not.
encrypted virus
a virus that is encrypted to prevent detection
the capability for one component to assume another components responsibilities without manual intervention
the malfunction of one component of a system
fault tolerance
the capacity for a system to continue performing despite an unexpected hardware or software malfunction
Fibre Channel
a distinct network transmission method that relies on fibre-optic media an its own proprietary protocol
file infector virus
a virus that attaches itself to executable files
hardware RAID
a method of implementing RAID that relies on an externally attached set of disks and a RAID disk controller, which manages the RAID array
heuristic scanning
a type of virus scanning that attempts to identify viruses by discovering virus like behavior
hot site
a place where the computers, devices and connectivity necessary to rebuild a network exist and all are appropriately configured, updated and connected to match your network’s current state
hot spare
a disk or partition that is part of the array, but used only in case one of the RAID disks fails
internet relay chat (IRC)
a protocol that enables users running special IRC client software to communicate instantly with other participants in a chat room
link aggregation
a fault-tolerance technique in which multiple ports or interfaces are bonded and wok in tandem to create one logical interface
logic bomb
a program designed to start when certain conditions are met
macro virus
a virus that takes the form of an application
a program or piece of code designed to harm a system or its resources
master name server
an authoritative name server that is queried first on a network when resolution of a name that is not already cached is equested
a fault-tolerance technique in which one component or device duplicates the activity of another
online backup
a technique in which data is backed up to a central location over the internet
online UPS
a power supply that uses the A/C power from the wall outlet to continuously charge its battery
optical media
a type of media capable of storing digitized data,
polymorphic virus
virus that changes its characteristics every time i is transferred to a new system
RAID (redundant array of independent disks)
a server redundancy measure that uses shared, multiple physical or logical hard disks to endue data integrity and availablility
storage area network
a distinct network of multiple storage devices and servers that provides fast, highly available and highly fault-tolerant access to large quantities of data for a client/server network
signature scanning
the comparison of a files content with known virus signatures
slave name server
a name server that can take the place of a master name server to resolve names and addresses on a network
volt-amp (VA)
a measure of electrical power
warm site
a place where the computers, devices and connectivity necessary to rebuild a network exis
an unwanted program that travels bw computers and across neworks