tailieunhanh - Lecture Network + Guide to Networks (5th edition) - Chapter 1: An introduction to Networking

Goals of this chapter: List the advantages of networked computing relative to standalone computing, distinguish between client/server and peer-to-peer networks, list elements common to all client/server networks, describe several specific uses for a network,. Inviting you to refer. | Why Use Networks Network - Group of computers and devices Connected by transmission media Stand-alone computer - Not connected to other computers - Uses local software and data Advantages of networks over standalone computers - Device sharing by multiple users Saves money and time - Central network management 9 7 2011 Goals of This Chapter List the advantages of networked computing relative to standalone computing Distinguish between client server and peer-to-peer networks List elements common to all client server networks Describe several specific uses for a network Identify some of the certifications available to networking professionals Identify the kinds of skills and specializations that will help you excel as a networking professional Types of Networks Models vary according to - Computer positioning - Control levels over shared resources - Communication and resource sharing schemes Network models - Peer-to-Peer - Client server 1 Peer-to-Peer Networks Advantages - Simple configuration - Inexpensive to set up Disadvantages - Not flexible - Not necessarily secure - Not practical for large installations 9 7 2011 Peer-to-Peer Networks Typical in a home with several computers Direct computer communication - Equal authority Individual resource sharing - May share resources - May prevent access to resources Each computer can send data to every other computer on the network Peer-to-Peer Networks Resource sharing method - Modify file sharing controls A user responsibility - Not centrally controlled Potential variations and security issues Environments - Small home or office - Large networks using the Internet Gnutella Freenet original Napster BitTorrent software 2 Obama s Helicopter Secrets Revealed Because of misconfigured peer-to-peer file sharing Link Ch 1a on the course Web page Click on CNIT 106 March 1st 2009 Marine One details leaked from P2P net Posted by Richard Koman March 1 2009 2 07 PM A company that monitors P2P networks says it found .