Living Online
description
Transcript of Living Online
![Page 1: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/1.jpg)
Living OnlineUnit 9
Network Fundamentals
![Page 2: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/2.jpg)
• Describe a network• Explain the benefits of a network• Identify risks in computing• Describe the roles of clients & servers• List & describe types of networks• List & describe communications media &
hardware• Describe network security
Objectives
![Page 3: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/3.jpg)
2 or more connected devices Can transfer data
Network
![Page 4: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/4.jpg)
Networks Benefits vs. Risks
Benefits Risks
![Page 5: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/5.jpg)
Theft of services
Theft of Information
Hatred & vengeance
For the thrill of it
Why Hack?
![Page 6: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/6.jpg)
T or F. Hackers invade other people’s computers only for fun.
T or F. Software sharing is one of the benefits of networking.
When you are on a network, you should assume that your email is not _____________?◦ Private
T or F. It is easier for a virus to spread on a network.
Review
![Page 7: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/7.jpg)
Server manages & provides a service to client
Network OS Username & password
Network Types- Client-Server
![Page 8: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/8.jpg)
No server Small office or house Easy to set up
Network Types- Peer to Peer
![Page 9: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/9.jpg)
Local Area Network Small geographic area
◦ Office, school, house
WLAN◦ Wireless◦ Need Wi-Fi card
Network Types- LAN
![Page 10: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/10.jpg)
Wide Area Network Large geographic
area◦ Two or more LANs
connected by routers◦ Big businesses with
office around country or world
Internet is biggest WAN
Connected by fiber, satellites, telephone
Network Types- WAN
![Page 11: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/11.jpg)
Global network of connected, smaller networks
World Wide Web & email are most popular
Network Types- Internet
![Page 12: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/12.jpg)
Web based for internal company use◦ Handbooks, manuals, employment forms, work
news, etc◦ Only can access from within that company◦ Through web browser
Network Types- Intranet
![Page 13: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/13.jpg)
Similar to Intranet
Outside users with user name & password can have access to internal info
Network Types- Extranet
![Page 14: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/14.jpg)
How is the network at school different than your home one? ◦ How is it the same?
Which type of network has an OS & requires a username/password for access?◦ Client-server
What are two popular Internet features?◦ Email & Web
At BK, you can access the Internet with your laptop & no wires. What type of network is this?◦ WLAN
Review
![Page 15: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/15.jpg)
Dial-Up Modem (Int or Ext)
◦ Modulate-demodulate Converts analog to digital &
reverse
◦ Data over phone lines Dialed into a phone number
◦ SLOWWWWW Old- 300 bits per second (bps) or
baud rate Now- 56k or kilobits per second
Communication Hardware- Modem
![Page 16: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/16.jpg)
Coaxial (Coax) cable
High speed, always on◦ Broadband◦ 20Mbps (Megabits per second)
Cable Modem
Comm. Hardware- Cable Modem
![Page 17: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/17.jpg)
Digital Subscriber Line
High speed, always on◦ Broadband◦ Through phone lines◦ 3Mbps
Can use phone & Internet at same time◦ Filters on phones
Comm. Hardware- DSL Modem
![Page 18: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/18.jpg)
ISDN (Old)◦ Faster than dial-up, over phone line
T1◦ High speed for business (1.5Mbps)◦ 24 copper or Fiber optic telephone line
FiOS◦ Similar to T1◦ Faster speeds◦ Limited areas
Comm. Hardware- Others
![Page 19: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/19.jpg)
Router◦ Connects computers◦ Shares one Internet connection◦ May allows wireless access◦ Firewall
Wireless Adapters or NIC
Communication Hardware
![Page 20: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/20.jpg)
How They Connect
![Page 21: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/21.jpg)
T or F. A modem converts analog to digital signals.
T or F. Hackers invade other people’s computers only for fun.
A _______ is confined to a limited geographical area.
A _______ is made up of several local area networks.
A _______ is a simple device that connects multiple computers together.
Review
![Page 22: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/22.jpg)
ISP◦ Internet Service Provider◦ Pay them (Comcast, Verizon)
Who to Connect to?
![Page 23: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/23.jpg)
Dial-Up◦ Slow◦ Telephone Lines
Broadband◦ High Speed◦ Always On◦ Cable, DSL, Satellite
Cable, Phone, Dish/Air, Fiber Optics Wi-Fi
◦ Wireless access◦ Public (Starbucks)
ISP Services
![Page 24: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/24.jpg)
Speeds
![Page 25: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/25.jpg)
Control access to computer◦ User name, passwords◦ If none, unauthorized people can gain access &
take/read valuable info OR change it so no one can use it
Passwords◦ Change often◦ Use upper & lowercase letters, numbers, punctuation
Not easy stuff◦ Don’t write them down “cheat sheet”
Broken mostly by shared ones or cheat sheets, not guessing
Network Security Issues
![Page 26: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/26.jpg)
Firewall◦ Protects against
unauthorized access to network from outside
Antivirus Software◦ Always be running,
updating
Wi-Fi Protection◦ Use the security settings
Network Security Issues
![Page 27: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/27.jpg)
Be careful who you hire◦ People who don’t follow rules
Back up data off-site
Biometric security◦ Fingerprint reader◦ Voice pattern◦ Retina scan
Network Security Solutions
![Page 28: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/28.jpg)
What device allows many PC’s to share a single, high-speed Internet connection?◦ Router
What are the companies called that charge you for Internet access?◦ ISP
What is the slowest Internet access method?◦ Dial-Up
Review
![Page 29: Living Online](https://reader036.fdocuments.net/reader036/viewer/2022062521/568168d3550346895ddfc516/html5/thumbnails/29.jpg)
Living OnlineUnit 9
Network Fundamentals