Discovery smb isp_chapter1

The Internet and Its Uses

Working at a Small-to-Medium Business or ISP –
Chapter 1

Version 4.1 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1

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.

© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 2

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


 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.


 An ISP is a company or organization through which a
subscriber obtains Internet access.


Internet Service Providers
 ISPs offer various connection options.


 High-bandwidth connection options for businesses:
– T1 connections
– T3 connections
– Metro Ethernet


 Hierarchical structure of the Internet.


 Use network utilities to map the Internet.
– Ping
– Traceroute


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


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


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


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.


Discovery smb isp_chapter1

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