1007ICT Study Guide - Final Guide: Booting, Network Layer, Application Layer
Document Summary
Week 8 - weekly assessment (2 marks: explain, with the aid of a diagram, the different layers of an operating system. Computer hardware: compare the operation of single process and multitasking. Also give one example operating system for each of these. Allows one program to be executed at a time. Allows multiple programs to be executed at same time. Processor typically switches rapidly back and forth between different programs. Example- ms windows: briefly explain what is bootstrapping. Explain, with the aid of a diagram, how the encapsulation takes place at different layers. Presentation layer: defines the format of the message, encryption. Session layer: defines, maintains and manages, when a message can be sent by keeping different application"s data sepearate. Transport layer: sends entire message across network in segments, tcp, ip and udp for reliable delivery. Network layer: provides a logical addressing to send packet data across a network in 2 parts: network address (ip) and host address.
