Week12
- 1. How Traffic Moves over the Internet ・point of presence (POP) ・Internet service provider (ISP) ・Routed Internet Access - Centrally Configured ・sending and receiving e-Mail
- 2. point of presence (POP) Point or network interface which a telephone company hands off its service to the subscriber at. Equipment on the outer side of the POP belongs to the telephone company, and that on the other side to the consumer.
- 3. Internet service provider (ISP) An Internet service provider (ISP), also sometimes referred to as an Internet access provider (IAP), is a company that offers its customers access to the Internet. The ISP connects to its customers using a data transmission technology appropriate for delivering Internet Protocol packets or frames, such as dial-up, DSL, cable modem, wireless or dedicated high-speed interconnects.
- 4. Routed Internet Access - Centrally Configured The above diagram shows a cell (point to multi-point) configuration in which the Air- Frame unit at the ISP premises is configured to control all network access. This diagram contrasts with a Distributed or Customer Controlled Routed network. The use of the DHCP function is not essential to the above operation but is shown to illustrate Air- Frame functionality and versatility. a separate DHCP server could be used or each PC could be separately configured. Similarly the use of a Proxy and Private IP addresses is not essential. Air-Frame routers support static and dynamic addresses. A single Air- Frame 100 can be configured to handle up to 64 separate customer locations. The Air- Frame may be configured to periodically authenticate connections using a RADIUS Server. Firewall functions may be located with the Proxy. The customer located Air- Frame may be configured as a Router or a Bridge.
- 5. sending and receiving e-Mail Like all other Internet users, you connect to the Internet through your ISP. All websites, including yours, reside on a host server. When someone accesses any website, the host server sends the website information through the Internet, through the user's ISP, and to the user's computer. Everything your computer sends to and receives from the Internet goes through your ISP. This includes e-mail. When you send e- mail using an e-mail client like Outlook, etc., it is sent from your computer, through your ISP, to the Internet, to then be delivered through the recipient's ISP to the recipient's computer. If you receive e-mail through your website, this e-mail is stored on the host's mail server until you retrieve it.
- 6. Reference ・Internet service provider http://en.wikipedia.org/wiki/Internet_service_provider ・Business Dictionary.com http://www.businessdictionary.com/definition/point-of-presence-POP.html ・Westone Corporation http://www.westone.com.cn/english/view31.htm ・Steam Packet Radio http://www.zytrax.net/solutions/isp/routed_central_access.htm