TAILIEUCHUNG - Lecture Business data communications: Chapter 13 - Behrouz A. Forouzan

Chapter 13 - The internet. In this chapter we first give a brief history of the Internet. We formally introduce the TCP/IP protocol suite (Internet model) that we used as a networking model throughout the book. We then discuss briefly the next generation protocol. Access to the Internet, both residential and organizational, is also discussed. Finally we introduce private networks, intranets, and extranets. | Chapter 13 The Internet Know how the Internet began. Understand the architecture of today’s Internet and its relation- ship with ISPs. Understand the importance of the TCP/IP protocol suite. After reading this chapter, the reader should be able to: OBJECTIVES Understand the role of IP, UDP, and TCP in the Internet. Understand the difference between the Internet, an intranet, and an extranet. HISTORY AND ADMINISTRATION RFCs can be found at Note: Figure 13-1 Internet today Technical Focus: Maturity Levels of an RFC An RFC, during its lifetime, falls into one of six maturity levels: proposed standard, draft standard, Internet standard, historic, experimental, and informational. Figure 13-2 Internet administration TCP/IP PROTOCOL SUITE Figure 13-3 TCP/IP protocol suite Figure 13-4 IP datagram Technical Focus: Inside the Header of an IP Datagram An IP datagram contains several fields. The most important are the source and destination addresses of the

• Quản trị mạng
• Business data communications
• Data communications
• Business data communications
• Internet administration
• TCP IP protocol suite
• Private networks
• Data link layer
• Network criteria
• Data communications system
• Data communications networks
• Media access control
• Network models
• Network standards
• Application layer
• Application architectures
• Physical layer
• Digital transmission
• Network and transport layers
• Transport layers
• Local area networks
• Traditional ethernet
• Wireless local area networks
• Wireless LANs
• Backbone networks
• Backbone network architectures
• Circuit switched networks
• Wide area networks
• Network security
• Risk assessment
• Network design
• Traditional network design
• Network management
• Configuration management