1. Networks and Connecting to the Internet

2. Learning Objectives
Explain the advantages and disadvantages of a computer network
Identify and define basic network hardware
Explain the differences between wired and wireless networks
Explain the steps to set up a basic network
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3. Learning Objectives (continued)
Describe how to access resources on a network
Identify different types of wired Internet connection options
Describe how to connect to the Internet without wires
Explain how IP addresses and domain names work
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4. Network Basics
Computer networks combine hardware, software, cables, and signals to allow communication and sharing
Figure F-1: A network connects computers and peripherals
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5. Network Basics (continued)
Sharing networked hardware reduces cost and expands access
Sharing networked software reduces costs, facilitates share and enables collaboration
Figure F-2: Networks help people collaborate
Computer Concepts – Illustrated 9th Edition

6. Network Hardware Client/server network
Server computer provides services and resources to client computers
Figure F-4: Structure of a client/server network
Computer Concepts – Illustrated 9th Edition

7. Network Hardware (continued)
Peer-to-peer (P2P) networks
Each computer is a client and a server
Figure F-5: Structure of a peer-to-peer (P2P) network
Computer Concepts – Illustrated 9th Edition

8. Network Hardware (continued)
Network devices include:
Modem
Network hub
Network switch
Network router
Gateway
Figure F-6: Ethernet ports and connector
Computer Concepts – Illustrated 9th Edition

9. Network Hardware (continued)
Network interface card (NIC)
Ethernet card
NIC that supports Ethernet protocols
Figure F-7: Ethernet adapters
Computer Concepts – Illustrated 9th Edition

10. Wired and Wireless Networks- A Comparison
Wired network
Data travels over cables
More secure
Offers faster speeds
Figure F-8: Cables and wireless router
Computer Concepts – Illustrated 9th Edition

11. Wired and Wireless Networks- A Comparison (continued)
Data travels through the air
Offers mobility
Figure F-9: Accessing a wireless connection outdoors
Computer Concepts – Illustrated 9th Edition

12. Wired and Wireless Networks- A Comparison (continued)
Wi-Fi card - a wireless NIC
Wireless access point - device that transmits and receives wireless signals
Figure F-11 Wi-Fi equipment
Computer Concepts – Illustrated 9th Edition

13. Figure F-15: Set up an Ethernet network
How to Set Up a Network
Ethernet/wired network
Figure F-15: Set up an Ethernet network
Computer Concepts – Illustrated 9th Edition

14. How to Set Up a Network (continued)
Wireless network
Set up the router
Connect to the router with a computer
Configure the router
Figure F-16: Wireless router
Computer Concepts – Illustrated 9th Edition

15. How to Set Up a Network (continued)
Wired and wireless network
Figure F-17: Basic configuration for a combined wired and wireless network
Computer Concepts – Illustrated 9th Edition

16. Figure F-20: Shared resources on a network computer
How to Use a Network
Windows automatically detects networks
Click the workgroup name to access
Figure F-20: Shared resources on a network computer
Computer Concepts – Illustrated 9th Edition

17. How to Use a Network (continued)
Drive mapping assigns a drive letter to a network location
Figure F-21: Drive mapping to share resources
Computer Concepts – Illustrated 9th Edition

18. How to Use a Network (continued)
File Sharing allows network users to access files or folders on a networked computer
Figure F-22: File sharing
Computer Concepts – Illustrated 9th Edition

19. How to Use a Network (continued)
Networked printer sharing
Figure F-23: Ways of connecting a printer to a network
Computer Concepts – Illustrated 9th Edition

20. Wired Internet Connection Options
Internet Service Provider (ISP)
Figure F-24: Connecting your computer to the Internet
Computer Concepts – Illustrated 9th Edition

21. Wired Internet Connection Options (continued)
Digital subscriber line (DSL) provides high-speed Internet access of phone lines
Figure E-26: DSL equipment
Computer Concepts – Illustrated 9th Edition

22. Wired Internet Connection Options (continued)
Cable Internet connection provides always-on broadband Internet access using cable television infrastructure
Figure F-27: Connect to the Internet via cable service
Computer Concepts – Illustrated 9th Edition

23. Wired Internet Connection Options (continued)
Satellite Internet service provides always-on, high-speed, asymmetric Internet access
Figure F-28: Connecting to the Internet via satellite service
Computer Concepts – Illustrated 9th Edition

24. Wireless Internet Connection Options
WiMAX (Worldwide Interoperability for Microwave Access)
Can be used in rural areas
Figure F-29: A WiMAX Tower
Computer Concepts – Illustrated 9th Edition

25. Wireless Internet Connection Options (continued)
Public Wi-Fi network provides open Internet access to the public
Figure F-30: A public Wi-Fi hotspot
Computer Concepts – Illustrated 9th Edition

26. Wireless Internet Connection Options (continued)
Mobile broadband provides Internet access via cell phone
Figure F-31: Using a phone for Internet access
Figure F-32: Using a phone as a modem
Computer Concepts – Illustrated 9th Edition

27. IP Addresses and Domain Names
IP address identify computers connected to the Internet
Example:
Figure F-34: Network Connection Details dialog box
Computer Concepts – Illustrated 9th Edition

28. IP Addresses and Domain Names (continued)
Domain names correspond to unique IP address and end with an extension indicating top-level domain
Figure F-35: How domain names work
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29. Talking Points: Why Pay for Internet Access?
Is free Internet access always legal?
Data security
Hackers can use unprotected wireless systems to steal financial information, download child pornography, etc.
Unregulated network availability raises ethical, security, and privacy issues
Free WLAN controversy
Telecommunications giants vs. free WLAN advocates
Computer Concepts – Illustrated 9th Edition

30. Summary This chapter introduced: Network Basics Network Hardware
Wired and Wireless Networks-A Comparison
How to Set Up a Network
How to Use a Network
Wired Internet Connection Options
Wireless Internet Connection Options
IP Addresses and Domain Names
Computer Concepts – Illustrated 9th Edition