TAILIEUCHUNG - Lecture Business data communications: Chapter 5 - Behrouz A. Forouzan

Chapter 5 - Data link layer. After reading this chapter, the reader should be able to: Understand the functions of the data link layer, understand the concept of hop-to-hop delivery compared to host-to-host delivery and application-to-application delivery, understand the concept of access method and define different access methods used in LANs and WANs. | Chapter 5 Data Link Layer Understand the functions of the data link layer. Understand the concept of the hop-to-hop delivery compared to host-to-host delivery and application-to-application delivery. Understand the concept of access method and define different access methods used in LANs and WANs . After reading this chapter, the reader should be able to: OBJECTIVES Understand the addressing mechanism used in the data link layer and how network layer addresses are mapped to data layer addresses. Understand how error control is handled at the data link layer. DUTIES OF THE DATA LINK LAYER Figure 5-1 Data link layer in the Internet model Figure 5-2 Data-link layer duties HOP-TO-HOP DELIVERY Figure 5-3 Hop-to-hop delivery PACKETIZING ADDRESSING Technical Focus: Addresses in Local Area Networks The physical address for most computers on local area networks is imprinted on the network card that is installed in the computer. If the user or network manager changes the .

• Quản trị mạng
• Business data communications
• Data communications
• Business data communications
• Data link layer
• Hop to hop delivery
• Error control
• 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