1. The Internet and Its Uses
Working at a Small-to-Medium Business or ISP – Chapter 1

2. Objectives
Describe how the Internet is evolving and the various ways that businesses are using the Internet.
Describe the importance of standards in the continuing growth of the Internet.
Describe the purpose of an ISP and the services that it offers.
Describe the hierarchical structure of the Internet and the purpose of the Point of Presence (POP) and the Internet Exchange Point (IXP).
Identify the types of devices used by the ISP to provide services and describe the importance of scalability in the ISP network.
Describe the various network support teams that work at an ISP and the roles and responsibilities of each one.

3. What is the Internet?
A worldwide, publicly accessible network of networks.
Business uses of the Internet:
E-commerce
Communications
Collaboration and training

4. What is the Internet?
A standard is a set of rules for how something must be done.
Internet standards are the product of a cycle of discussion, problem solving, and testing.

5. What is the Internet?
An ISP is a company or organization through which a subscriber obtains Internet access.

6. Internet Service Providers
ISPs offer various connection options.

7. Internet Service Providers
High-bandwidth connection options for businesses:
T1 connections
T3 connections
Metro Ethernet

8. Internet Service Providers
Hierarchical structure of the Internet.

9. Internet Service Providers
Use network utilities to map the Internet.
Ping
Traceroute

10. ISP Connectivity
Access Devices: DSLAM, CMTS, modems, wireless bridging equipment
Border Gateway Routers
Servers
Power conditioning equipment
High-capacity air conditioning

11. ISP Connectivity Scalability to allow for future growth.
Modular devices with expansion slots.

12. ISP Connectivity Roles and responsibilities within an ISP:
On-site Installation
Customer Service
Planning and Provisioning
NOC
Help Desk

13. Summary
Businesses use the Internet for e-commerce, communications, collaboration, and training.
Internetworking standards ensure that all devices connecting to the Internet use the same set of rules.
All Internet connections are made through an Internet Service Provider (ISP).
Multiple ISPs join together at an Internet Exchange Point (IXP) to gain access to each other’s networks.
ISPs must provide a reliable and scalable network.
ISP organizations are composed of many teams offering a range of support services.