TAILIEUCHUNG - Lecture Business data communications: Chapter 4 - Behrouz A. Forouzan

Chapter 4 - Network layer. After reading this chapter, the reader should be able to: Understand the position of the network layer in the Internet model, understand the rationale for the existence of the network layer, understand the concept of host-to-host delivery,. | Chapter 4 Network Layer Understand the position of the network layer in the Internet model. Understand the rationale for the existence of the network layer. Understand the concept of host-to-host delivery. Understand the duties of the network layer: packetizing, addressing, and routing. After reading this chapter, the reader should be able to: OBJECTIVES Know which upper-layer protocol can use the services of IP. Understand the network layer protocol, IP, used in the Internet. INTRODUCTION Figure 4-1 Network layer in the Internet model Figure 4-2 Duties of the network layer ADDRESSING The network addresses must be unique. Note: Technical Focus: Binary Notation of IP Addresses An IP address is stored as a binary number in the computer. A 4-part dotted-decimal address can be converted to binary if we replace each part by its binary equivalent. The following shows the IP address in dotted-decimal and binary notation: 00001010 00100010 11100000 00001000

• Quản trị mạng
• Business data communications
• Data communications
• Business data communications
• Network layer
• Host to host delivery
• Internet model
• 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