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Connecting to the Internet

Connecting to the Internet. William R. Jarrett Networking for Home and Small Businesses. The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide.

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Connecting to the Internet

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  1. Connecting to the Internet William R. Jarrett Networking for Home and Small Businesses

  2. The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. • Unlike intranets, the internet has no central point of control and is made up of many independent networks. What is the internet?

  3. Out of the chaos comes order… To help regulate how all these independent networks communicate over this large decentralized network, several organizations were formed to address the problems of decentralized control. Protocols and methods had to be created and Standards agreed upon by everyone to ensure all could benefit.

  4. Main Development Organizations • Internet Society (ISOC) • Internet Architecture Board (IAB) • Internet Engineering Task Force (IETF) • Internet Research Task Force (IRTF) • Internet Assigned Numbers Authority (IANA)

  5. What is an Internet Service Provider? • An Internet service provider (ISP), also sometimes referred to as an Internet access provider (IAP), is a company that has a direct connection to the internet and offers its customers access. • ISP’s frequently offer other services such as email and web hosting services as well.

  6. Points of Presence An Internet Point of Presence is the access point to the Internet the internet service provider uses. It is a physical location that houses servers, and routers. An ISP may have many POP’s which are connected to other POP’s within the ISP’s Network. ISP’s connect to other ISP’s through Internet Exchange Points.

  7. Network Operations Center • Every Internet Service Provider has a network Operations Center which acts as a control center for the ISP’s Network. • This center only controls activities occurring on the ISP’s network and should not be confused with a central control point for the entire world wide web.

  8. Options for Connecting to the Internet • Dial up • Cellular Modem • Cable Modem

  9. Options for Connecting to the Internet • Digital Subscriber List (DSL) • Leased Lines (T1 Line) • Satellite

  10. Types of Services • Asymmetric- • Home Users • Cable Modem, DSL • Fast download, slow upload • Symmetric- • Businesses • T1 Line • Dedicated line, Fast Upload and download speeds.

  11. What services are available? Available technology will dictate what types of services will be made available to customers. There are still large areas of the US and the world which do not have Fiber optic service extended to their area or are lacking in infrastructure.

  12. Service Level Agreements • Connection Speed- 56 Kbps to 1.5 Mbps • E-Mail Accounts- user@cableone.net • Personal Home Pages- Free home web page • Web Hosting Services- GoDaddy.com • File Storage- Carbonite • IP Telephone (VOIP)- Vonage • Virus Scanning- Blocked by Service Provider • Content Filtering- NO PORN FOR YOU! • Video on Demand- HULU

  13. Messages are made of packets Every packet has a header containing; IP Address Sender IP Address Receiver Each packet is from 64 – 1500 bytes in size. Every packet is sent to the Network Operations Center for routing.

  14. Through rain sleet and snow….. • The packets are handed off from router to router through other ISP’s to their final destinations. New York Rome London Paris Frankfurt

  15. Any Questions?

  16. Daily Question • What is the internet and how does it differ from an intranet?

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