Computer Networking Module
Computer Networking Module
Computer Networking Module Summary
Unit 1: OSI Model and TCP/IP Model
The OSI model consists of seven layers for network communication, while the TCP/IP model divides communication into four layers. The Medium Access Control Sublayer is responsible for flow control and multiplexing, with functions like addressing, frame delimiting, media access control, frame filtering, and error detection. MAC addresses are unique identifiers for devices, and channel allocation involves assigning communication channels to network devices.
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Types of Channel Allocation and MAC Protocols
Static channel allocation assigns fixed frequency channels to users, while dynamic allocation assigns channels as needed. Random Access Protocols like ALOHA allow all stations equal priority to send data. Pure ALOHA sends data without checking channel status, while Slotted ALOHA divides the channel into time slots for more efficient transmission. CSMA involves sensing channel traffic before data transmission, with variations like 1-persistent, non-persistent, P-persistent, and O-persistent modes. CSMA/CD helps manage collisions in Ethernet networks.
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