Cnna Final Exam Review Edition 7 Chapter 9

Front 1

Active-activemode

Back 1

Alink aggregation configuration in which both connections are activeas a matter of course. If one link fails, the other maintains theconnection.

Front 2

Automaticfailover

Back 2

Inthe event of a component failure, the ability of a redundantcomponent to immediately assume the duties of the failed component.

Front 3

Baseline

Back 3

Arecord of how a network operates under normal conditions (includingits performance, error statistics, utilization rate, and so on).Baselines are used for comparison when conditions change.

Front 4

Cloudbackup

Back 4

Atechnique in which data is backed up to a central location over theInternet

Front 5

Discardedpackets

Back 5

apacket that arrives at its destination but is then deliberatelyrejected because issues such as buffer overflow, latency,bottlenecks, or other forms of network congestion delayed the packetbeyond its usable time frame.

Front 6

EF

Back 6

(ExpeditedForwarding) One of two DiffServ forwarding specifications. EF assignseach data stream a minimum departure rate from a given node. Thistechnique circumvents delays that slow normal data from reaching itsdestination on time and in sequence. EF information is inserted inthe DiffServ field of an IPv4 packet.

Front 7

Generator

Back 7

Acomputer that is monitored by a syslog compatible application andthat issues event information.

Front 8

Ghost

Back 8

Aframe that is not actually a data frame, but rather an aberrationcaused by a device misinterpreting stray voltage on the wire. Unliketrue data frames, ghosts have an invalid pattern at the beginning ofthe frame pattern.

Front 9

H.323

Back 9

Asignaling protocol used to make a connection between hosts prior tocommunicating multimedia data. H.323 has largely been replaced bySIP, which is easier to use.

Front 10

Hotspare

Back 10

Aduplicate component already installed in a device that can assume theoriginal component’s functions in case that component fails.

Front 11

Integrity

Back 11

Theassurance that a network’s programs, data, services, devices, andconnections have not been altered without authorization. To ensure anetwork’s integrity, it must be protected from anything that mightrender it unusable, such as corruption, tampering, natural disasters,and viruses

Front 12

IP-PBX

Back 12

Aprivate switch that accepts and interprets both analog and digitalvoice signals (although some IP-PBXs do not accept analog lines). Itcan connect with both traditional PSTN lines and data networks. AnIP-PBX transmits and receives IP-based voice signals to and fromother network connectivity devices, such as a router or gateway.

Front 13

Jabber

Back 13

Adevice that handles electrical signals improperly, usually affectingthe rest of the network. A network analyzer will detect a jabber as adevice that is always retransmitting, effectively bringing thenetwork to a halt. A jabber usually results from a bad NIC.Occasionally, it can be caused by outside electrical interference.

Front 14

Linkaggregation

Back 14

Theseamless combination of multiple network interfaces or ports to actas one logical interface.

Front 15

MEGACO

Back 15

Aprotocol used between media gateway controllers and media gateways.Megaco is poised to replace MGCP on modern converged networks, as itsupports a broader range of network technologies, including ATM. Alsoknown as H.248.

Front 16

MGCP

Back 16

(MediaGateway Control Protocol) A protocol used for communication betweenmedia gateway controllers and media gateways.

Front 17

PacketShaping

Back 17

Softwarerunning on a router, multilayer switch, gateway, server, or even aclient workstation that can prioritize traffic according to protocol,IP address, user group, DiffServ flag (in an IP packet), VLAN tag,service, or application

Front 18

Polling

Back 18

Anetwork management application’s regular collection of data frommanaged devices.

Front 19

Port5060 and 5061

Back 19

Ports5060 and 5061, both on TCP and UDP, are associated to the SessionInitiation Protocol (SIP) by IANA

Front 20

RTCP

Back 20

(Real-timeTransport Control Protocol) A companion protocol to RTP that providesfeedback on the quality of a call or videoconference to itsparticipants.

Front 21

SIP

Back 21

(SessionInitiation Protocol) A set of Application layer signaling and controlprotocols for multiservice, packet-based networks. SIP is used tomake an initial connection between hosts for transferring multimediadata

Front 22

Syslog

Back 22

Astandard for generating, storing, and processing messages aboutevents on a system. Syslog describes methods for detecting andreporting events and specifies the format and contents of messages.

Front 23

Videobridge

Back 23

Hardwareor software that manages multiple audiovisual sessions so thatparticipants can see and hear each other.

Front 24

Videostreaming

Back 24

Aservice in which video signals are compressed and delivered over theInternet in a continuous stream so that a user can watch and listeneven before all the data has been transmitted.

Front 25

Webcaching

Back 25

Atechnique in which Web pages are stored at an ISP or locally, eitheron a host or network, and then delivered to requesters more quicklythan if they had been obtained from the original source.

Front 26

Wireshark

Back 26

Wiresharkis a Free and Open packet analyzer. It is used for networktroubleshooting, analysis, software and communications protocoldevelopment, and education.

Front 27

Whatis SNMP? How is it used? What are the different versions?

Back 27

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Front 28

Whatdo firewalls do?

Back 28

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