TAILIEUCHUNG - Lecture Business data communications: Chapter 11 - Behrouz A. Forouzan

Chapter 11 - Wide area networks. In this chapter, we first discuss point-to-point WANs, WANs that do not use switches. Then we discuss switched WANs. We focus especially on ATM, the dominant WAN technology. Finally, we discuss ATM LANs, LANs that use ATM WAN technology. | Chapter 11 Wide Area Networks Understand point-to-point WAN technologies: T-lines and SONET networks. Understand technology and why it is losing popularity. Understand Frame Relay technology and how it was designed to replace . Understand ATM technology and its importance in today’s market. After reading this chapter, the reader should be able to: OBJECTIVES Understand ATM LANs. POINT-TO-POINT WANs Figure 11-1 T-1 line A T-1 line has a data rate of Mbps Note: A T-3 line has a data rate of Mbps Note: Technical Focus: Fractional T-Lines Many subscribers may not need the entire capacity of a T- line. To accommodate these customers, telephone companies offer fractional T-line services, which allow several subscribers to share one line by multiplexing their transmissions. Figure 11-2 SONET SWITCHED WANs Technical Focus: Tunneling To use an network, an IP packet uses a technique called tunneling. Because does not allow IP packets to use their .

• Quản trị mạng
• Business data communications
• Data communications
• Business data communications
• Wide area networks
• Point to point WANs
• Switched WANs
• 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
• Network security
• Risk assessment
• Network design
• Traditional network design
• Network management
• Configuration management