Chapter 8

Domain 7Telecommunications and network security

Exam objectives in this chapter

• Network Architecture and Design

• Network Devices and Protocols

• Secure Communications

Unique terms and definitions

• The OSI model—a network model with seven layers: physical, data link, network, transport, session, presentation, and application

• The TCP/IP model—a simpler network model with four layers: network access, Internet, transport, and application

• Packet-switched network—a form of networking where bandwidth is shared and data is carried in units called packets

• Switch—a layer 2 device that carries traffic on one LAN, based on MAC addresses

• Router—a layer 3 device that routes traffic from one LAN to another, based on IP addresses

• Packet Filter ...

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