Chapter 6 Communications and Network Technologies: Connecting Through Computers
Chapter Outline
6.1 How Does the World Use
Networking?
6.2 Exploring
Communications Systems
Types of Signals
Transmission Speed
Take the Next Step: Activity
6.2.1
6.3 Transmission Systems
Wired Transmissions
Wireless Transmissions
Spotlight on the Future
Podcast: The Changing World
of Voice Communications
Take the Next Step: Activity
6.3.1
Our Digital World, Second Edition
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Key Terms-Insert Image or definition
computer network
intranet
extranet
communications system
network protocol
analog signal
digital signal
modem
frequency
bandwidth
broadband
kilobit per second (Kbps)
megabit per second (Mbps)
gigabit per second (Gbps)
terabit per second (Tbps)
petabit per second (Pbps)
Study Questions-Insert Image or answer
What's the definition of a computer network?
How are computer networks used?
What's the difference between an intranet and an extranet?
What are the components of a computer network as a communications system?
How do we use networked communication systems in our everyday lives?
What are network protocols?
How do analog signals differ from digital signals?
Why do analog signals need to be converted?
What does a modem do?
What factors affect transmission speed?
What is frequency and how does it affect transmission speed?
To what does bandwidth refer?
What is broadband?
What are the various bandwidth measurements?
What are the typical speeds for the various types of Internet connections?
What happens when you send a message over a network?
twisted-pair cable
coaxial cable
fiber-optic cable
cellular network
cellular transmissions
microwave
satellite communication
What are the two ways signals can be transmitted?
What media are used to carry wired signals?
How do the various types of cable differ?
What types of wireless transmission systems are in use today?
What are the differences among the four generations of cellular transmission?
What are the drawbacks of microwave transmission?
How is satellite communication used?
According to Silverman, why are people starting to reject electronic voice
communication?
Why might telephone numbers disappear?
Do advances in “Internet telephony” signal a renaissance in voice communications?
Will video calling, like that offered by Apple FaceTime, become the norm?
What might be the “next big thing” in the way people use technology to network
with each other?
How does infrared technology work?
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Chapter Outline
6.4 Communications
Standards and Protocols
Key Terms-Insert Image or definition
standards
American National Standards Institute (ANSI)
Institute of Electrical and Electronics Engineers
(IEEE)
protocol
Study Questions-Insert Image or answer
How do standards help devices talk to one another?
What organizations develop standards?
What is a protocol?
Exploring Network Transport
Standards
Ethernet
token ring
token
TCP/IP
packet
packet switching
Wi-Fi
802.11 standard
hotspot
WiMAX
4G standard
Bluetooth
tethering
Radio Frequency Identification (RFID)
Wireless Application Protocol (WAP)
email server
webmail
What are three primary network transport standards?
How are data transmissions controlled over Ethernet?
How does a network using the token ring standard work?
How do packets factor into a TCP/IP protocol?
Where is TCP/IP used?
Wireless Networking Standards
Take the Next Step: Activity
6.4.1
Take the Next Step: Activity
6.4.2
6.5 Network Classifications
Types of Networks
Local Area Networks
What networking standards are used in wireless communications?
On what standard is Wi-Fi based?
What versions of Wi-Fi are in use?
What is a hotspot?
What standard does WiMAX use?
What are the advantages of WiMAX?
How is Bluetooth used?
How is RFID used?
What does WAP do?
What are SMTP, POP, and IMAP?
How does Bluetooth work?
What are the three important network characteristics covered in this section?
What are the three main categories of networks?
How much space is typically covered by a LAN or WLAN?
What are the components of a LAN/WLAN?
Metropolitan Area Networks
local area network (LAN)
server
wireless LAN (WLAN)
metropolitan area network (MAN)
Wide Area Networks
wide area network (WAN)
What are the components of a MAN?
Where would you find a MAN?
How are WANs used?
Network Architecture
network architecture
client/server network
client
distributed application architecture
peer-to-peer (P2P) network
Internet peer-to-peer (P2P) network
What are the two major network architectures?
What is a client/server architecture, and why is it considered a distributed application
architecture?
How are peer-to-peer networks set up?
What are the pros and cons of a peer-to-peer network?
How are Internet peer-to-peer networks used?
Our Digital World: Introduction to Computing
© Paradigm Publishing, Inc.
Chapter 6 Study Notes
Page 2 of 4
Chapter Outline
Network Topologies
Bus Topology
Key Terms-Insert Image or definition
topology
bus topology
Ring Topology
ring topology
Star Topology
star topology
Take the Next Step: Activity
6.5.1
6.6 Networking Devices and
Software
Network Devices
Modems to Send and Receive
Signals
Hardware That Provides
Access to a Network
Devices That Connect Devices
to Each Other on a Network
Network Operating Systems
Take the Next Step: Activity
6.6.1
6.7 Securing a Network
Take the Next Step: Activity
6.7.1
6.8 Interesting Trends in
Networking
Mobility and VoIP
Cloud Computing
Study Questions-Insert Image or answer
What is a topology?
What are the components used in a bus topology?
What are the advantages and disadvantages of a bus topology?
How does data travel on a ring topology?
What are the advantages and disadvantages of a ring topology?
What device is at the middle of the star topology?
What are the advantages and disadvantages of a star topology?
What's the role of a hub and switch in a star network?
What hardware comprises the physical part of a network?
node
dial-up modem
DSL modem
cable modem
wireless modem
mobile broadband stick
network adapter
network interface card (NIC)
wireless interface card
wireless access point
router
wireless router
repeater
hub
switch
gateway
bridge
network operating system (NOS)
What is a node?
What are the differences among the various types of modems?
firewall
What does a firewall do?
What is the difference between a hardware and software firewall?
Long Term Evolution (LTE) standards
What two buzzwords are key in networking circles today?
Our Digital World: Introduction to Computing
© Paradigm Publishing, Inc.
What functions do network adaptors and NICs serve?
What does a wireless access point do?
What does a router connect?
When would a repeater be used?
What type of network uses a hub?
Which is smarter, a hub or a switch? Why?
What is connected by a gateway or bridge?
What does a network operating system do?
How is a NOS different from the OS found on a PC?
How do I set up a wireless home network?
Why are companies building Wi-Fi and VoIP into their internal computer networks?
What does it mean to be in the cloud?
Chapter 6 Study Notes
Page 3 of 4
Chapter Outline
Take the Next Step: Activity
6.8.1
Key Terms-Insert Image or definition
Our Digital World: Introduction to Computing
© Paradigm Publishing, Inc.
Study Questions-Insert Image or answer
How can cloud computing save businesses money?
Chapter 6 Study Notes
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