networkingchpt.7 Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
wan | network that traverses some distance and usually connects lans |
wan | network transversing some distance |
wan and lan common properties | client host resource sharing |
layer three and higher protocols | |
packet switched digitized data | |
lans and wans | |
adsl | a variation of dsl that offers more throughput when data travel downstream,downloading from a local carriers switching facility to the customer,that when data travel upstream,uploading from the customer to the local carriers switching facility |
asymmetrical | the characteristic of a transmission technology that affords greater bandwidth in one direction than in the other direction,customer to the carrier or vice versa |
asynchronous | a transmission method in which data being transmitted and received by nodes do not have to conform to any timing scheme. |
atm | asynchronous transfer mode |
atm | data link layer technology.relies on fixed packets called cells that consist of forty eight bytes plus a five byte header |
atm | relies on virtual circuits and establishes a connection before send |
b channel | bears traffic from point to point |
bri | basic rate interface |
bonding | process of combining more than one bearer channel of an isdn line to increase throughput |
bpl | broadband over powerline |
bri | a variety of isdn that uses two 64 kbps bearer channels and one 16 kbps data channel |
bri | most common form of isdn employed by home users |
wan and lan differences | layer 1 and 2 access methods,topologies,media |
wan and lan differences | lan wiring,privately owned |
wan and lan differences | wan wiring:public thru network service providers,ex.at&t |
broadband cable | a method of connecting to the internet over a cable network |
lan topologies differences | distance covered,number of users,traffic |
lan topologies differences | connect sites via dedicated high speed links |
broadband cable | computers are connected to a cable modem that modulates and demodulates signals to and from the cable companys head-end |
bus topology wan | each location is connected to no more than two other locations in a serial fashion |
cable drop | the fiber optic or coaxial cable that connects a neighborhood cable node to a customers house |
bus topology wan | each site connects serially to two sites maximum |
bus topology wan | network site dependent on every other site to transmit and receive traffic |
bus topology wan | different locations connected to another thru point to point links |
bus topology wan best use | organizations requiring small wan dedicated circuits |
bus topology wan drawback | not scalable |
cable modem | a device that modulates and demodulates signals for transmission and reception via cable wiring |
cell | a packet of fixed size |
cir | committed information rate |
cir | the guaranteed minimum amount of bandwidth selected when leasing a frame relay circuit |
co | central office |
ring topology wan | each site connected to two other sites |
ring topology wan | forms ring pattern |
ring topology wan | connects location |
ring topology wan | relies on redundant rings |
ring topology wan | data rerouted upon site failure |
ring topology wan | expansion is difficult and expensive |
ring topology wan best use | connecting maximum five locations |
co | the location where a local or long distance telephone service provider terminates and interconnects customer lines |
star topology wan | single site as central connection point |
star topology wan | seperate data routes between any two sites |
star topology wan | single connection failure affects one location |
star topology wan | shorter data paths between two sites |
star topology wan | expansion is simple and less costly |
star topology wan | |
star topology wan | |
csu | channel service unit |
mesh topolgy wan | incorporates many directly interconnected sites |
mesh topolgy wan | data travels directly froom origin to destination |
mesh topolgy wan | routers can redirect data easily,quickly |
mesh topolgy wan | most faulerant type of wan |
mesh topolgy wan | every wan is directly connected to every other site |
mesh topolgy wan | expensive |
csu | a device used with t carrier technology that provides termination for the digitsl signal and ensures connection integrity thru error correction and line monitoring |
csu/dsu | channel service unit and data service unit |
csu/dsu | serves as the connection point for a t1 line at the customers site |
csu/dsu | may be a seperate device or an expansion card in another device such as a router |
d channel | in isdn the data channel is used to carry information about the call,such as session initiation and termination signals,caller identity,call forwarding and conference signaling |
dedicated | a continuously available link or service that is leased by another carrier |
tiered topology wan | sites that are interconnected in star or ing formation,interconnected at different levels |
tiered topology wan | interconnection points organized into layers,form hierarchial groups |
tiered topology wan | flexible,many variations |
tiered topology wan | requires careful considerations,geography,usage patterns |
tiered topology wan | |
dialup | a connection in which a user connects to a distant network from a computer and stays connected for a finite period of time |
pstn | |
pstn | network of lines,carrier equipment providing telephone service |
pstn | plain old telephone service |
pstn | encompasses entire telephone system |
downstream | data traffic that flows from a carriers facility to a customer |
ds0 | digital signal level 0 |
ds0 | the equivalent of one data or voice channel in t carrier technology |
dsl | digital subscriber line |
dsl | a dedicated wan technology that uses advanced data modulation techniques at the physical layer to acheive extraordinary throughput over regular phone lines |
pstn elements | cannot handle digital transmission |
dslam | dsl access multiplexer |
local loop | last mile |
local loop | portion of the pstn that connects any residence or business to the nearest central office |
niu | network interface unit |
niu | the point at which pstn owned lines terminate at a customers premise |
ftth | fiber to the home |
ftth | telephone company connects residential users to its network with fiber optic cable |
fttp | fiber to the premises |
fttp | the use of a fiber optic cable to connect either a residence or a business |
pon | passive optical network |
pon | a carrier uses fiber optic cabling to connect with multiple endpoints |
olt | optical line terminal |
olt | device with multiple optical ports similar to interfaces on a router |
onu | optical network unit |
onu | distributes signals to multiple end poins via fiber optic cable |
x.25 | analog packet switching technology designed for long distance transmission |
x.25 standard specifies protocols at the | physical,data link, and network layers of he osi model |
x.25 | provides excellent flow control and ensures data reliability by verifying the transmission at every node |
frame relay | digital version of x.25 that relies on packet switching |
frame relay | protocols operate at the data link layer |
frame relay | seperated into frames which are then relayed from one node to another without any verification or processing |
frame relay | does not guarantee reliable delivery of data |
virtual circuits | |
svc | switched virtual circuits |
svc | |
pvc | permanent virtual circuits |
pvc | |
svc are connections | that are established when parties need to transmit then terminate after the transmission is complete |
pvcs are connections | |
isdn | integrated services digital network |
isdn | transmitting digital data over the public switch telephone network |
isdn specifies protocols | physical,data link,and transport layers of the osi model |
protocols handle | signaling,framing,connection setup and termination,rouing,flow control,and error detection and correction |
isdn can carry | as many as two voice calls and one data connection on a single line |
isdn channels | b and d channel |
single b channel maximum throughput | 64 kbps |
single d channel maximum throughput | 16 or 64 kbps |
data channel | employing packet switching techniques to carry information about the call |
bearer channel | employing circuit switching techniques to carry voice,video,audio,and other types of data |
isdn connections | bri and pri |
bri | uses two b channels and one d channel |
bri | most economical type of isdn connection |
nt1 | network termination |
nt1 | |
te | terminal equipment |
ta | terminal adapter |
ta | converts digital signals into analog signals for use with isdn phones and other analog devices |
primary rate interface | |
network termination 2 | |
bonding | |
disadvantage of isdn | span a distance of only 18,000 linear feet before repeater equipment is needed to boost the signal |
t-carrier | standards specify a method of signaling which means they belong to the physical layer of the osi model |
t carrier | uses time division multiplexing |
t1 circuit | carry the equivalent of 24 voice or data channels,giving a maximum of 1.544 mbps |
t3 circuit | carry the equivalent of 672 voice or data channels,giving a maximum of 44.736 mbps |
speed of a t carrier | depends on its signal level |
signal level | |
ds0 | |
fractional t1 | an arrangement that allows a customer to lease only some of the channels on a t1 line |
smart jack | a termination for t carrier wire pairs that is located at the customer demarc and which functions as a connection protection and monitoring point |
csu/dsu | connection point for a t1 line |
csu provides | termination for the digial signal and ensures connection integrity thru error correction and line monitoring |
dsu provides | converts the t carrierframes into frames the lan can interpret and vice versa |
multiplexer | a device that seperates a medium into multiple channels and issues signals to each of those subchannels |
dsl | digital subscriber line |
dsl | wan connection method |
dsl | uses data modulation techniques at the physical layer to acheive extraordinary throughput over regual phone lines |
types of dsl | adsl, g.lite,hdsl,sdsl,vdsl,shdsl, |
asymmetrical dsl | offers more throughput in one direction than another |
downstream | data traveling from the carriers switching facility to the customer |
symmterical | provides equalcapacity for data traveling both upstream and downstream |
upstream | data traveling from the customer to the carriers switching facility |
dsl modem |
Created by:
cgeaski
Popular Computers sets