Lecture12 Connecting to the Internet Wired Internet Connections

Lecture-12 Connecting to the Internet

Wired Internet Connections • Dial-up connections – Standard phone lines and a modem – Computer dials a number for your ISP – All Internet programs use the connection – Applications might need configured 10 A-2

Wired Internet Connections • High-speed broadband connections – Any connection faster than dialup – Networks share the broadband connection • All users access the same connection • DSL lines common – Home use increasing due to • Lower cost • Increased availability 10 A-3

Wired Internet Connections • ISDN – Offers speeds up to 1. 5 Mbps – Uses standard phone lines – Requires special equipment – Simultaneous use of phone and data 10 A-4

Wired Internet Connections • DSL – Offers speeds up to 30 Mbps – Uses modified phone lines • Needs special DSL modem – Simultaneous use of phone and data – Asynchronous DSL • Different up and download speeds – Synchronous DSL – Variable DSL • Speed changes based on traffic 10 A-5

DSL Connections 10 A-6

Wired Internet Connections • Cable modems – Speeds up to 3 Mbps – Uses cable TV wires – Requires a cable modem – Simultaneous use of TV and data 10 A-7

Software Accessing The Internet • Application programming interface (API) – Simplifies connection to network devices – Allows any application to access Internet – UNIX API uses sockets – Windows API uses winsock 10 A-8

Software Accessing The Internet • Network drivers – Control access to the hardware – Ethernet and dial-up require a driver – API connects to the driver 10 A-9

Wireless Internet Connection • Wireless WAN (WWAN) – Wireless network over a large area – Uses radio signals to transfer data – Speeds range from 1 to 100 Mbps – Antennas required 10 A-10

Wireless Internet Connection • Satellite services – Internet access in remote regions – Suitable for home and office use – Needs a VSAT at the client • Very Small Aperture Terminal • Connects to the satellite – Modem connects to the VSAT 10 A-11

Wireless Internet Connection • Wireless LANs (WLAN) – Network without wires – Connects to a broadband LAN connection – WAP are wired directly into the LAN – Nodes use wireless 10 A-12

Wireless LAN 10 A-13

E- Commerce • Companies doing business with each other such as manufacturers selling to distributors and wholesalers selling to retailers and consumers. 10 A-14

Types of Electronic Commerce • • • Business-to-business (B 2 B) Consumer (B 2 C) Business-to-government (B 2 G) Consumer-to-consumer (C 2 C) Mobile commerce (m-commerce) E-Commerce: The Second Wave, Fifth Annual Edition 15

B 2 B and B 2 C Electronic Commerce

What is B 2 B e-commerce? • B 2 B e-commerce is simply defined as ecommerce between companies. About 80% of e-commerce is of this type. • Examples: – Intel selling microprocessor to Dell – Heinz selling ketchup to Mc Donalds

What is B 2 C ecommerce? • Business-to-consumer e-commerce, or commerce between companies and consumers, involves customers gathering information; purchasing physical goods or receiving products over an electronic network. • Example: – Dell selling me a laptop

What is B 2 G ecommerce? • Business-to-government e-commerce or B 2 G is generally defined as commerce between companies and the public sector. It refers to the use of the Internet for public procurement, licensing procedures, and other government-related operations • Example: – Business pay taxes, file reports, or sell goods and services to Govt. agencies.

What is C 2 C ecommerce? • Consumer-to-consumer e-commerce or C 2 C is simply commerce between private individuals or consumers. • Example: – Mr. Tariq buying an i. Pod from Mr. Mobeen on e. Bay – Me selling a car to my neighbor

What is m-commerce? • M-commerce (mobile commerce) is the buying and selling of goods and services through wireless technology-i. e. , handheld devices such as cellular telephones – Mobile Ticketing – Information Services – Mobile Banking