1. Communications
1.1. Connectivity
1.2. The Wireless Revolution
1.3. Communication Systems
1.3.1. Sending and Receiving
1.3.2. Connection Devices
1.3.2.1. Modems
1.3.2.1.1. Telephone Modem
1.3.2.1.2. DSL
1.3.2.1.3. Cable Modem
1.3.2.1.4. Wireless Modem
1.3.2.2. Connection Service
1.3.2.2.1. DSL
1.3.2.2.2. Cable Service
1.3.2.2.3. Satellite Connection Services
1.3.2.2.4. Callular Service Providers
1.3.3. Data Trasmission Specifications
1.3.3.1. Bandwidth
1.3.3.1.1. Voiceband
1.3.3.1.2. Medium Band
1.3.3.1.3. Broadband
1.3.3.1.4. Baseband
1.3.3.2. Protocols
1.3.3.2.1. Identification
1.3.3.2.2. Packetization
1.3.4. Communication Channel
1.3.4.1. Physical Connection
1.3.4.1.1. Twisted-Pair Cable
1.3.4.1.2. Coaxial Caple
1.3.4.1.3. Fiber-Optical Cable
1.3.4.2. Wireless Connection
1.3.4.2.1. Bluetooth
1.3.4.2.2. Wi-Fi
1.3.4.2.3. Microwave
1.3.4.2.4. WiMax
1.3.4.2.5. LTE
1.3.4.2.6. Satellite
2. Networks
2.1. Network Terms
2.1.1. Node
2.1.2. Client
2.1.3. Server
2.1.4. Directory Server
2.1.5. Host
2.1.6. Router
2.1.7. Switch
2.1.8. Network Interface Cards NIC
2.1.9. Netwrok Operating System NOS
2.1.10. Network Administrator
2.2. Network Types
2.2.1. Local Area Networks
2.2.2. Home Networks
2.2.3. Wireless LAN
2.2.4. Personal Area Networks
2.2.5. Metropolitan Area Networks
2.2.6. Wide Area Networks
2.3. Network Architecture
2.3.1. Topologies
2.3.1.1. Bus Network
2.3.1.2. Ring Network
2.3.1.3. Star Network
2.3.1.4. Tree Network
2.3.1.5. Mesh Network
2.3.2. Strategies
2.3.2.1. Client/ Server Networks
2.3.2.2. Perr-to-Peer P2P
2.4. Organizational Networks
2.4.1. Internet Technologies
2.4.1.1. IntrAnet
2.4.1.2. ExtrAnet
2.4.2. Network Security
2.4.2.1. Firewall
2.4.2.2. Intrusion Detection System IDS
2.4.2.3. Virtual Private Networks VPN