- 1. COMMUNICATION AND NETWORK DEVICES
2. COMMUNICATIONSin computers, describes a process in which one
computer transfer data, instructions, andinformation to another
computer. 3. COMMUNICATIONS REQUIRES:1. SENDING DEVICE a device
thatinitiates the transfer.2. COMMUNICATION CHANNEL provides the
pathway over which themessage can travel from source todestination.
4. COMMUNICATIONS REQUIRES:3. RECEIVING DEVICE a device thataccept
the sent material. 5. USES OF COMPUTERCOMMUNICATIONSE-MAIL
(ELECTRONICMAIL) the exchange of textmessages andcomputer files via
acommunicationsnetwork. 6. USES OF COMPUTER COMMUNICATIONSVOICE
MAIL an answeringmachine but convertsan analog voicemessage into
digitalform. 7. USES OF COMPUTER COMMUNICATIONSFAX
(facsimile)machine- sends and receivesdocuments viatelephone lines
8. USES OF COMPUTER COMMUNICATIONSTELECOMMUTING allows employees
towork away from thestandard workplace andcommunicate usingsome
communicationstechnology. 9. USES OF COMPUTER
COMMUNICATIONSVIDEOCONFERENCING involves using video andcomputer
technology toconduct a meeting betweenparticipants at two or
moregeographically separatelocations. 10. USES OF
COMPUTERCOMMUNICATIONSGROUPWARE- is a softwareapplication that
helpspeople work togetherand share informationover a network. 11.
USES OF COMPUTERCOMMUNICATIONSBBS (BULLETINBOARD SYSTEM)- a
computer thatmaintains a centralizedcollection of
electronicmessages. 12. USES OF COMPUTER COMMUNICATIONSGPS
(GLOBALPOSITIONINGSYSTEM) consist of earth based receivers that
analyzesatellite signals todetermine the receiversgeographic
location. 13. USES OF COMPUTERCOMMUNICATIONSINTERNET a
worldwidecollection of networks. 14. COMMUNICATIONSCHANNELis the
communications path between twodevices; this is composed of one or
moretransmission media. 15. TRANSMISSION MEDIA is consists of
materials or techniquescapable of carrying one or more signals,this
is composed of two types: the physical wireless transmission media
16. 2 TYPES OF TRANSMISSION MEDIA1. PHYSICAL TRANSMISSION MEDIA use
wire, cable, and other tangible materials to send communications
signals, these include: 17. 2 TYPES OF TRANSMISSION MEDIAa) TWISTED
PAIR CABLE - often used intelephone networks and LAN. b) COAXIAL
CABLE data travelsthrough the copper wire. c) FIBER-OPTIC CABLE use
light totransmit signals. 18. 2 TYPES OF TRANSMISSION MEDIA2.
WIRELESS TRANSMISSION MEDIA -send communication signals through
theair or space using radio, microwave andinfrared signals, these
include: 19. 2 TYPES OFTRANSMISSION MEDIAa) BROADCAST RADIO - for
radios/television.b) CELLULAR RADIO - for mobile
communications/cellular telephones.c) MICROWAVES - radio waves that
provide high speed signal transmission. 20. 2 TYPES OF TRANSMISSION
MEDIA d) COMMUNICATIONS SATELLITE - aspace station hat receives
microwavesignals from an earth based station. e) INFRARED sends
signal usinginfrared light waves. 21.
TRANSMISSIONCHARACTERISTICStransmission sent during
communicationscategorized in these characteristics:1. SIGNAL TYPE
A)analog B)digital C)broadband D)baseband 22. TRANSMISSION
CHARACTERISTICS2. TRANSMISSION MODES A) asynchronous transmission
B) synchronous transmission 23. TRANSMISSION
CHARACTERISTICS3.TRANSMISSION DIRECTIONA) simplex transmissionB)
half-duplex transmissionC) full duplex transmission 24.
TRANSMISSIONCHARACTERISTICS4. TRANSFER RATES A) Bandwidths range of
frequenciesthat a transmission can carry. 25. TELEPHONE NETWORKthe
public switched telephone network (PSTN) isthe worldwide telephone
system that handlesvoice communication and also an integral part
ofdata communications, sending data via thetelephone network travel
over a variety oftransmission media and can be sent using dial-up
lines or dedicated lines. 26. TELEPHONE NETWORK 27. TELEPHONE
NETWORKDIAL-UP LINES - dial-up line is atemporary connectionthat
uses one or moreanalog telephone linesfor communications. 28.
TELEPHONE NETWORKDEDICATED LINES connections that alwaysestablished
between twocommunications devices, itprovides constant
connection.Businesses can buy or leaseddedicated line from
telephone orcommunications ServiceCompany. 29. 4 POPULAR TYPES
OFDIGITAL LEASED LINES1. ISDN (Integrated Services DigitalNetwork)
LINES is a set of communication standards forsimultaneous digital
transmission of voice, video,data, and other network services over
thetraditional circuits of the public switchedtelephone network.
30. 4 POPULAR TYPES OF DIGITAL LEASED LINES1. ISDN (Integrated
Services DigitalNetwork) LINES 31. 4 POPULAR TYPES OFDIGITAL LEASED
LINES 2. DIGITALSUBSCRIBER LINES(DSL)- uses broadband to transmit a
greater number ofbytes on a standard twisted-pair cable. o Some of
the DSL installations can provide a dial tone so you can use the
line for both voice and data. 32. 4 POPULAR TYPES OF DIGITAL LEASED
LINES2. DIGITAL SUBSCRIBER LINES (DSL) 33. 4 POPULAR TYPES
OFDIGITAL LEASED LINES3. T-CARRIER LINES- is any of several types
of digital lines thatcarry multiple signals over a
singlecommunications. 34. 4 POPULAR TYPES OF DIGITAL LEASED LINES3.
T-CARRIER LINES 35. 4 POPULAR TYPES OFDIGITAL LEASED LINES4.
ASYNCHRONOUS TRANSFER MODE (ATM)- is a service designed to carry
voice, data,video, and multimedia at high speeds -currently up to
622 Mbps. 36. 4 POPULAR TYPES OFDIGITAL LEASED LINES4. ASYNCHRONOUS
TRANSFER MODE (ATM) 37. COMMUNICATIONSSOFTWARE- that makes it
possible to send andreceive data over telephone lines
throughmodems. - that manage the transmission of data, instruction,
and information between computers. - helps users establish a
connection to another computer or network. - provide an interface
for users to communicate with one another. 38.
COMMUNICATIONSSOFTWARE 39. COMMUNICATIONS DEVICESis any type of
hardware capable oftransmitting data,instructions,andinformation
between a sending device anda receiving device. 40. COMMUNICATIONS
DEVICES 41. COMMON TYPES OFCOMMUNICATION DEVICEMODEM- device that
perform conversion in digitalsignals and analog signals, it can
beinternal or external.- Both the sending and receiving ends of
acommunications channel must have a modemfor data transmission to
occur. 42. COMMON TYPES OF COMMUNICATION DEVICEMODEM 43. COMMON
TYPES OFCOMMUNICATION DEVICECABLE MODEM a modem that sends and
receives dataover the cable television (CATV) network,which consist
largely of coaxial cable. 44. COMMON TYPES OF COMMUNICATION
DEVICECABLE MODEM 45. COMMON TYPES OF COMMUNICATION
DEVICEMULTIPLEXER (MUX) a device that combines two or more
inputsignals from various devices into a singlestream of data and
then transmits it over asingle transmission medium. 46. COMMON
TYPES OF COMMUNICATION DEVICEMULTIPLEXER (MUX) 47. COMMON TYPES
OFCOMMUNICATION DEVICENETWORK INTERFACE CARD (NIC) an expansion
card that you insert into anexpansion slot of a personal computer
orother device, such as a printer, enabling thedevice to connect to
a network. 48. COMMON TYPES OFCOMMUNICATION DEVICE NETWORK
INTERFACE CARD (NIC) 49. CONNECTING NETWORKSthousands of computer
networks exist fromsmall networks to global networks,
tointerconnect the many types of networksthere are many various
types ofcommunications devices including these: 50. CONNECTING
NETWORKSHUB also called concentrator or multistationaccess unit
(MAU), provides a central pointfor cables in a network, usually
containports for eight to twelve computers andother devices. 51.
CONNECTING NETWORKSHUB 52. CONNECTING NETWORKSREPEATER a device
that accepts a signal from atransmission medium, amplifies it,
andremits it over the medium. 53. CONNECTING NETWORKSREPEATER 54.
CONNECTING NETWORKSBRIDGE a device that connects two LANs usingthe
same protocol such as Ethernet. 55. CONNECTING NETWORKSBRIDGE 56.
CONNECTING NETWORKSGATEWAY combination of hardware and softwarethat
connects network that use differentprotocols. 57. CONNECTING
NETWORKSGATEWAY 58. CONNECTING NETWORKSROUTER a device that
connects multiple networksincluding those with different protocols.
59. CONNECTING NETWORKSROUTER 60. NETWORKcollection of computers
and devicesconnected by communicationschannels that allows users to
sharedata, information hardware, andsoftware with other users. 61.
NETWORK 62. TYPES OF NETWORKSLOCAL AREANETWORK (LAN) is a network
thatconnects computersand devices in a limitedgeographical area.
63. TYPES OF NETWORKSWIRELESS LAN(WLAN) is a LAN that uses
nophysical wires. 64. TYPES OF NETWORKSMETROPOLITANAREA
NETWORK(MAN) connects LANS inmetropolitan area. 65. TYPES OF
NETWORKSWIDE AREANETWORK (WAN) is a network thatcovers a
largegeographical area. 66. NETWORK TOPOLOGY ORNETWORK
ARCHITECTUREthe configuration or physical arrangementof the device
in a communication network. 67. 3 COMMONLY USEDNETWORK TOPOLOGIES
1. BUS NETWORK node must be intelligent enough to listento the bus.
68. 3 COMMONLY USEDNETWORK TOPOLOGIES2. RING NETWORK each node has
an equal amount ofintelligence. 69. 3 COMMONLY USED NETWORK
TOPOLOGIES3. STAR NETWORK all nodes are joined at single central
pointusing one link for each node. 70. PROTOCOLis a set of rules
and procedures forexchanging information among computers. 71.
PROTOCOLETHERNET- is a LAN protocol thatallows personalcomputers to
contendfor access to a network. 72. PROTOCOLTOKEN RING- is protocol
that controlaccess to a network byrequiring that a specialsignal
called a token isshared or passedamong network devices. 73.
PROTOCOLTCP/IP (TRANSMISSIONCONTROLPROTOCOL/INTERNETPROTOCOL)- is a
set of protocolsused to manage datatransmission bybreaking it up
intopackets. 74. INTRANETSare internal networks that use Internet
andWeb technologies, it makes companyinformation accessible to
employees tofacilitate working in groups. 75. INTRANETS 76.
EXTRANETis an intranet that extends to authorize usersoutside the
company.
