This document provides an overview of key topics covered in Chapter 9 of the textbook "Discovering Computers 2008". It discusses computer communications and networks, including components required for successful communications, uses of computer communications, types of networks, network communication standards, communications devices, setting up home networks, transmission media, and more. The objectives are to understand concepts like client/server networks, wireless technologies, and the infrastructure that enables computer and data transmission.
To limit the scope of this white paper, we will assume readers are currently or will soon be using a Cisco Unified Wireless Network with Cisco Light Weight APs, and Wireless LAN Controller in what is also referred to as a Split MAC design. This white paper is focused around the basics of troubleshooting Enterprise Wireless Networks (Wi-Fi), some of the most common issues seen in these environments, and common tools used to troubleshoot Wi-Fi.
CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology)
"Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53"
Learn more about the PACE-IT Online program: www.edcc.edu/pace-it
What exactly is a private 5G network?
A private 5G network is a local area network (LAN) that will use 5G technology to create a private network with unified connectivity, optimized services, and secure communication methods in a specific area.
In fact, the concept of a private 5G network has been around since the 2G/3G/4G era, and it is not new to us. A private network is a professional network that provides network signal coverage in a specific area to provide communication services to specific users.
In short, a private network is a dedicated network that provides network communication services for specific users. The difference between a public network and a private network is mainly that a public network serves the general public, while a private network serves specific objects.
Wireless wan solutions customer presentation at&t_revised2_02-13-2012NGINX at F5
Wireless WAN (WWAN) Connectivity from AT&T can keep your business connected, get your business connected quickly, and enable data transmission and transaction processing from almost anywhere business takes you. Much more than just backup, WWAN is ideal for primary connectivity for lower bandwidth applications in situations where wired networks are unavailable or infeasible.
Benefits
Cost-effective connectivity for low-bandwidth transactional applications
Ubiquitous access from virtually any location via the AT&T network
No lengthy provisioning timeframes
Portable for use in temporary deployments
To limit the scope of this white paper, we will assume readers are currently or will soon be using a Cisco Unified Wireless Network with Cisco Light Weight APs, and Wireless LAN Controller in what is also referred to as a Split MAC design. This white paper is focused around the basics of troubleshooting Enterprise Wireless Networks (Wi-Fi), some of the most common issues seen in these environments, and common tools used to troubleshoot Wi-Fi.
CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology)
"Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53"
Learn more about the PACE-IT Online program: www.edcc.edu/pace-it
What exactly is a private 5G network?
A private 5G network is a local area network (LAN) that will use 5G technology to create a private network with unified connectivity, optimized services, and secure communication methods in a specific area.
In fact, the concept of a private 5G network has been around since the 2G/3G/4G era, and it is not new to us. A private network is a professional network that provides network signal coverage in a specific area to provide communication services to specific users.
In short, a private network is a dedicated network that provides network communication services for specific users. The difference between a public network and a private network is mainly that a public network serves the general public, while a private network serves specific objects.
Wireless wan solutions customer presentation at&t_revised2_02-13-2012NGINX at F5
Wireless WAN (WWAN) Connectivity from AT&T can keep your business connected, get your business connected quickly, and enable data transmission and transaction processing from almost anywhere business takes you. Much more than just backup, WWAN is ideal for primary connectivity for lower bandwidth applications in situations where wired networks are unavailable or infeasible.
Benefits
Cost-effective connectivity for low-bandwidth transactional applications
Ubiquitous access from virtually any location via the AT&T network
No lengthy provisioning timeframes
Portable for use in temporary deployments
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2. Chapter 9 Objectives
Discuss the components required for
successful communications
Discuss the components required for
successful communications
Identify various sending
and receiving devices
Identify various sending
and receiving devices
Describe uses of computer communicationsDescribe uses of computer communications
List advantages of using a networkList advantages of using a network
Differentiate among client/server,
peer-to-peer, and P2P networks
Differentiate among client/server,
peer-to-peer, and P2P networks
Describe the various network
communications standards
Describe the various network
communications standards
Explain the purpose of
communications software
Explain the purpose of
communications software
Describe various types of lines for
communications over the telephone network
Describe various types of lines for
communications over the telephone network
Describe commonly used
communications devices
Describe commonly used
communications devices
Discuss different ways to set up
a home network
Discuss different ways to set up
a home network
Identify various physical and wireless
transmission media
Identify various physical and wireless
transmission media
Next
3. Communications
What are computer communications?
Nextp. 460 Fig. 9-1
Process in which two or more computers or devices transfer data,
instructions, and information
4. Sending
device — initiates
instruction to
transmit data,
instructions, or
information
What is needed for successful communications?
Communications
Nextp. 460 - 461
Communications
device — connects
the communications
channel to the
receiving device
Receiving
device — accepts
transmission of data,
instructions, or
information
Communications
device — connects
the sending device to
the communications
channel
Communications
channel — media
on which data,
instructions, or
information travel
5. What is Needed for Successful
Communications?
The Devices and Channel are Connected.
Communi-
cations
device
Sending
device
Receiving
device
Communi-
cations
device
Communi-
cations
channel
6. Uses of Computer Communications
What are some uses of communications technology?
Nextp. 462
WebWebWebWebInternetInternetInternetInternet E-MailE-MailE-MailE-Mail
InstantInstant
MessagingMessaging
InstantInstant
MessagingMessaging
InternetInternet
TelephonyTelephony
InternetInternet
TelephonyTelephony
NewsgroupsNewsgroupsNewsgroupsNewsgroupsChat RoomsChat RoomsChat RoomsChat Rooms
WebWeb
FoldersFolders
WebWeb
FoldersFolders
Fax MachineFax Machine
or Computeror Computer
Fax/ModemFax/Modem
Fax MachineFax Machine
or Computeror Computer
Fax/ModemFax/Modem
VideoVideo
ConferencingConferencing
VideoVideo
ConferencingConferencing
FTPFTPFTPFTP
7. Uses of Computer Communications
Video: A First Look at Yahoo Messenger 8 with Voice
Next
CLICK TO START
8. Uses of Computer Communications
What are wireless messaging services?
p. 463 - 464 Next
Wireless instantWireless instant
messagingmessaging allowsallows
wireless mobilewireless mobile
devices to exchangedevices to exchange
messagesmessages
Text messagingText messaging
allows users to sendallows users to send
and receive shortand receive short
text messages on atext messages on a
phone or PDAphone or PDA
Picture messagingPicture messaging
allows users to sendallows users to send
graphics, pictures,graphics, pictures,
video clips, soundvideo clips, sound
files, and short textfiles, and short text
messagesmessages
VideoVideo
messagingmessaging
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Video Messaging below
Chapter 9
9. Uses of Computer Communications
What are wireless Internet
access points and
cybercafés?
Nextp. 464-465 Fig. 9-4
Wireless Internet access
point allows wireless
connection to Internet
in public location
3G network
Cybercafé is coffee
house that provides
computers with Internet
access
10. Uses of Computer Communications
What is a global positioning system (GPS)?
Nextp. 466 Fig. 9-6
Step 1.
GPS satellites orbit
Earth. Every
thousandth of a
second, each satellite
sends a signal that
indicates its current
position to the GPS
receiver.
Step 2.
A GPS receiver
(such as in a car,
a wearable
device, a smart
phone, a
handheld device,
or a collar)
determines its
location on Earth
by analyzing at
least 3 separate
satellite signals
from the 24
satellites in orbit.Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
GPS below Chapter 9
11. Uses of Computer Communications
What are collaboration and
groupware?
Nextp. 467 Fig. 9-7
A document management
system provides for storage
and management of a
company’s documents
Groupware is software
that allows people
work together and share
information
Collaboration is working
with other users connected
to a server
12. Uses of Computer Communications
What are voice mail and web services?
Nextp. 468 Fig. 9-8
Voice mail is voice message
converted to digital form
Web services describe
standardized software that
enables programmers to
create applications that
communicate with other
remote computers over the
Internet or on an internal
business network
13. Networks
What is a network?
Nextp. 469 Fig. 9-9
Collection of
computers and
devices connected
via communications
devices and
transmission
media
14. Networks
What is a local area network (LAN) and a
metropolitan area network (MAN)?
Nextp. 471 – 472 Fig. 9-10
Network in limited geographical area such as
home or office building
Wireless LAN (WLAN)
Metropolitan area network (MAN) connects LANs
in city or town
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Wireless Local Area Networks
below Chapter 9
15. Networks
What is a wide area
network (WAN)?
Nextp. 472 Fig. 9-12
Network that covers
large geographic
area using many
types of media
Internet is world’s
largest WAN
16. Networks
What is a client/server
network?
Nextp. 472 Fig. 9-13
One or more computers
act as server and other
computers, or clients,
access server
17. Networks
What is a peer-to-peer
network?
Nextp. 473 Fig. 9-14
Simple network
that connects
fewer than 10
computers
Each computer,
or peer, has equal
capabilities
18. Networks
What is Internet peer-to-peer
(P2P)?
Nextp. 473 - 474 Fig. 9-15
Sometimes called a file
sharing network
Enables users to
connect to each other’s
hard disks and
exchange files directly
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
BitTorrent below Chapter 9
19. Networks
What is a bus network?
Nextp. 474 Fig. 9-16
All computers and devices connect to central
cable or bus
Example of network topology (layout of devices in
network)
Popular topologies are bus, ring, and star
20. Networks
What is a ring network?
Nextp. 474 Fig. 9-17
Cable forms closed
ring, or loop, with all
computers and devices
arranged along ring
Data travels from
device to device
around entire ring, in
one direction
21. Networks
What is a star network?
Nextp. 475 Fig. 9-18
All devices connect to
a central device (hub
or switch)
All data transferred
from one computer to
another passes
through hub or switch
22. Networks
What is an intranet?
Nextp. 475
Extranet allows customers or suppliers to access
part of company’s intranet
Typically includes connection to Internet
Makes information accessible to employees
Internal network that uses Internet technologies
23. Network Communications
Standards
What are Ethernet and token ring?
Nextp. 476
Ethernet technology allows computers to contend
for access to network
If two computers send data at same time,
a collision occurs and computers must send again
Token ring technology controls access to network
by requiring devices to pass a special signal,
called tokenClick to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Ethernet below Chapter 9
24. Network Communications
Standards
What are TCP/IP and 802.11 (Wi-Fi)?
Nextp. 477 - 478 Fig. 9-20
TCP/IP (Transmission Control Protocol/Internet
Protocol) technology transmits data by breaking it up
into small pieces, or packets
Commonly used for Internet transmissions
802.11 (Wi-Fi) is family of standards for wireless LANs
25. Network Communications
Standards
What is Bluetooth?
Nextp. 478
Short-range radio waves transmit
data between Bluetooth devices
Short-range radio waves transmit
data between Bluetooth devices
26. Network Communications
Standards
What are UWB, IrDA, RFID, WiMAX, and Wireless
Applications Protocol (WAP)?
Nextp. 478 - 480
Click to view Web
Link, click Chapter 9,
Click Web Link from left
navigation, then click
WiMAX below Chapter 9
IrDAIrDA
specification allows
data to be transferred
wirelessly via infrared
light waves
IrDAIrDA
specification allows
data to be transferred
wirelessly via infrared
light waves
Wireless ApplicationsWireless Applications
Protocol (WAP)Protocol (WAP)
allow wireless mobile devices
to access Internet
Wireless ApplicationsWireless Applications
Protocol (WAP)Protocol (WAP)
allow wireless mobile devices
to access Internet
Radio FrequencyRadio Frequency
Identification (RFID)Identification (RFID)
uses radio signals to communicate
with a tag placed in an object
Radio FrequencyRadio Frequency
Identification (RFID)Identification (RFID)
uses radio signals to communicate
with a tag placed in an object
Worldwide InteroperabilityWorldwide Interoperability
for Microwave Access (WiMAXfor Microwave Access (WiMAX
or 802.16)or 802.16)
standard that specifies how wireless
devices communicate over the air
in a wide area
Worldwide InteroperabilityWorldwide Interoperability
for Microwave Access (WiMAXfor Microwave Access (WiMAX
or 802.16)or 802.16)
standard that specifies how wireless
devices communicate over the air
in a wide area
UWBUWB
specification allows
data to be transferred
wirelessly via short-range
radio waves
UWBUWB
specification allows
data to be transferred
wirelessly via short-range
radio waves
27. Communications Software
What is communications software?
Nextp. 480
Programs that help users
establish connection to
Internet, other network,
or another computer Programs that help users
manage transmission of
data, instructions,
and information
Programs that provide an
interface for users to
communicate with one
another
28. Communications Over the Telephone Network
What is the public switched
telephone network (PSTN)?
Nextp. 481 Fig. 9-23
Worldwide telephone
system that handles
voice-oriented
telephone calls
29. Communications Over the Telephone Network
What is a dial-up line?
Nextp. 481
Temporary connection using telephone line for
communications
Costs no more than making regular call
Computers at any two locations can establish a
connection using modems and telephone network
30. Communications Over the Telephone Network
What is a dedicated line?
Nextp. 482 Fig. 9-24
Five types are ISDN
line, DSL, FTTH
and FTTB, T-carrier
line, and ATM
Always-on connection
between two
communications
devices
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
FTTH below Chapter 9
31. Communications Devices
What are examples of communications devices?
Nextp. 484
Common types are dial-up modems, ISDN and
DSL modems, cable modems, wireless modems,
network cards, wireless access points,
routers, and hubs
ISDN and DSL modems send
and receive data from ISDN
and DSL lines
32. Communications Devices
What is a dial-up modem?
Nextp. 485
A dial-up modem converts digital signals to analog signals
and vice versa
Usually in the form of an adapter card
33. Communications Devices
What are ISDN and DSL modems?
Nextp. 485
Communications devices that send and
receive digital ISDN and DSL signals
Communications devices that send and
receive digital ISDN and DSL signals
Usually external devices in which one
end connects to a telephone line and the other
end connects to a port on the system unit
Usually external devices in which one
end connects to a telephone line and the other
end connects to a port on the system unit
34. Communications Devices
What is a cable modem?
Nextp. 485 - 486 Fig. 9-28
Sends and receives
data over cable
television network
Much faster than
dial-up modem or
ISDN
Sometimes called a
broadband modem
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Cable Modems
below Chapter 9
35. Communications Devices
What is a wireless modem?
Nextp. 486 Fig. 9-29
Allows access to the
Web wirelessly from
a notebook
computer, a PDA, a
smart phone, or
other mobile device
Typically use the
same waves used by
cellular telephones
36. Communications Devices
What is a network card?
Nextp. 486 - 487 Fig. 9-30
Adapter card, PC
Card, ExpressCard
module, USB
network adapter, or
flash card that
enables computer or
device to access
network
Sometimes called
network interface
card (NIC)
37. Communications Devices
What is a wireless access point?
Nextp. 487 Fig. 9-31
Central
communications
device that allows
computers and
devices to transfer
data wirelessly among
themselves or
wirelessly to a wired
network
38. Communications Devices
What is a router?
Nextp. 488 Fig. 9-32
Connects computers and
transmits data to correct
destination on network
Routers forward data on
Internet using fastest available
path
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Hardware Firewalls below
Chapter 9
Some routers have a built-in
hardware firewall
39. Communications Devices
What is a hub or switch?
Nextp. 488 - 489 Fig. 9-33
Device that provides central
point for cables in network
40. Home Networks
What is a home network?
Nextp. 489 - 490 Fig. 9-34
Multiple computers
connected in home
Several types of home
networks
Ethernet — connect
computers via cable
Powerline cable —
use electrical lines in house
Phoneline — use
telephone lines
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Home Networks
below Chapter 9
41. Communications Channel
What is a communications channel?
Nextp. 491
Transmission media on which data travels in
communications system
Bandwidth is amount of
data that can travel
over a communications
channel
Transmission media
are materials capable of
carrying one or more
signals
43. Physical Transmission Media
What is physical transmission media?
Nextp. 492 Fig. 9-36
Wire, cable,
and other tangible
materials used
to send
communications
signals
44. Physical Transmission Media
What are twisted-pair cable and coaxial cable?
Nextp. 493 Fig. 9-37—9-38
Twisted-pair cable is used for telephone systems and network cabling
Coaxial cable is often used for cable television wiring
45. Physical Transmission Media
What is fiber-optic cable?
Nextp. 493 Fig. 9-39
Capable of carrying
significantly more
data at faster speeds
than wire cables
Less susceptible
to interference
(noise) and, therefore,
more secure
Smaller size (thinner
and lighter)
46. Wireless Transmission Media
What is wireless transmission media?
Nextp. 494 Fig. 9-40
Used when inconvenient, impractical, or impossible to
install cables
Includes Bluetooth and IrDA
47. Wireless Transmission Media
What are broadcast radio and cellular radio?
Nextp. 494 and 495 Fig. 9-41
Broadcast radio
distributes radio
signals over long
and short distances
Cellular radio
is form of
broadcast radio
used for mobile
communications
Click to view Web
Link, click Chapter 9, Click
Web Link from left
navigation, then click
Cellular Communications below
Chapter 9
48. Wireless Transmission Media
What is a microwave station?
Nextp. 495 Fig. 9-42
Earth-based
reflective
dish used for
microwave
communications
Must transmit in
straight line with
no obstructions
49. Wireless Transmission Media
What is a communications satellite?
Nextp. 496 Fig. 9-43
Space station
that receives
microwave signals
from earth-based
station, amplifies
signals, and
broadcasts signals
back to any
number of earth-
based stations
50. Summary of Communications and Networks
Chapter 9 Complete
Communications terminology
and applications
Communications terminology
and applications
How to join computers into a networkHow to join computers into a network
Various communications
devices, media, and procedures
Various communications
devices, media, and procedures