网络基础(思科).pdf

© 2006 Cisco Systems, Inc. All rights reserved. SMBUF-1

SMB University: Selling Cisco SMB Foundation Solutions

Networking Fundamentals

© 2006 Cisco Systems, Inc. All rights reserved. SMBUF-2

Objectives

• Describe the function and operation of a hub, a switch and a

router

• Describe the function and operation of a firewall and a

gateway

• Describe the function and operation of Layer 2 switching,

© 2006 Cisco Systems, Inc. All rights reserved. SMBUF-3

What is a Network?

can share resources such as data, a printer, an Internet

connection, applications, or a combination of these

resources.

© 2006 Cisco Systems, Inc. All rights reserved. SMBUF-4

Types of Networks

Local Area Network (LAN)

Metropolitan Area Network (MAN)

Wide Area Network (WAN)

© 2006 Cisco Systems, Inc. All rights reserved. SMBUF-5

WAN Technologies

Circuit-switched