4 Basic Definitions in Data Networks

In this chapter some basic definitions in data networks will be discussed including types of switching, header, interface, protocol, PDU, SDU, encapsulation, network math and metric units etc.

• 4.1 Circuit-Switching, Message-Switching and Packet-Switching
• 4.2 Communication between Hosts in Packet-Switched Networks
• 4.3 Bandwidth, Throughput and Delay
• 4.4 Network Math and Metric Units