Attendance Syllabus Textbook (hardcopy or electronics) Notebook + internet connection + power strip Groups s First-time meeting.

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Presentation transcript:

Attendance Syllabus Textbook (hardcopy or electronics) Notebook + internet connection + power strip Groups s First-time meeting

Trends Faster & cheaper More intelligent – quality of service, network management & security The internet, the web, and associated applications “everything over IP” Mobility & cloud computing

Data Transmission and Network Capacity Requirements The Emergence of High-Speed LANs Hub, Switch, Router

A Communications Model

Local Area Network (LAN) The concept of “integration” LAN (Ethernet) Token ring (obsolete) Ethernet hub/switch Wireless LAN (WLAN) Wi-Fi

Wide Area Network (WAN) Circuit Switching Packet Switching Frame Relay Asynchronous Transfer Mode (ATM) - fixed-length cells Note: Circuit Switching = customers pay for leased lines Packet Switching = customers pay as they go (sharing) Relay = avoid fully connected Frame Relay = flow the frames through relays no overheads, no error checks, fast WAN providers design the structure of network and manage the relay switches. ATM = fixed-length cells (frames) easy for hardware implementation, fast switching

Circuit Switching

Packet Switching

Frame Relay / ATM Physical connection changes real-time (no prior setup)

The Internet Note: A router can connect two or more networks. Every host (end system) has a unique IP address, e.g is my PC. A host can send data to another host anywhere on the Internet. The data is split into IP datagrams / IP packets.

Internet Architecture

A Example Configuration