COS 2626
COMPLETE SUMMARY
NOTES 2022
, CHAPTER 01: INTRODUCTION
A---NETWORK MODELS---
NETWORK: Group of computers and other devices connected by some form of transmission
media.
TOPOLOGY: Describes how parts of a network work together
PHYSICAL TOPOLOGY: Describes how components fit together to form physical network.
LOGICAL TOPOLOGY: Has to do with the software side of a network.
-Operating systems control how users and programs get access to resources on a network.
-OS’s configured to use one of two models: P2P and Client-server
NOS (Network Operating System): Controls access to entire network. Required by client-
server model.
,P2P MODEL
-OS of each computer on the network is responsible for controlling access to resources.
-No centralised control
-Each computer controls own admin, resources and security
-Generally used if fewer than 15 computers
Resource sharing on windows OS:
-Windows folder and file sharing
-Workgroup
-Homegroup
Advantages: (simple and cheap)
-Simple to configure
-Less expensive
Disadvantages:
, -Not scalable
-Not necessarily secure
-Time consuming to manage resources
CLIENT-SERVER MODEL
SERVER: A computer or program that provides a service (data or resources) to other devices.
CLIENT: A computer making a request from another computer.
-Resources managed by NOS via a centralized directory database
-Clients don’t directly share resources with one another, instead access is controlled by
entries in the centralized directory database. Servers control this database.
COMPLETE SUMMARY
NOTES 2022
, CHAPTER 01: INTRODUCTION
A---NETWORK MODELS---
NETWORK: Group of computers and other devices connected by some form of transmission
media.
TOPOLOGY: Describes how parts of a network work together
PHYSICAL TOPOLOGY: Describes how components fit together to form physical network.
LOGICAL TOPOLOGY: Has to do with the software side of a network.
-Operating systems control how users and programs get access to resources on a network.
-OS’s configured to use one of two models: P2P and Client-server
NOS (Network Operating System): Controls access to entire network. Required by client-
server model.
,P2P MODEL
-OS of each computer on the network is responsible for controlling access to resources.
-No centralised control
-Each computer controls own admin, resources and security
-Generally used if fewer than 15 computers
Resource sharing on windows OS:
-Windows folder and file sharing
-Workgroup
-Homegroup
Advantages: (simple and cheap)
-Simple to configure
-Less expensive
Disadvantages:
, -Not scalable
-Not necessarily secure
-Time consuming to manage resources
CLIENT-SERVER MODEL
SERVER: A computer or program that provides a service (data or resources) to other devices.
CLIENT: A computer making a request from another computer.
-Resources managed by NOS via a centralized directory database
-Clients don’t directly share resources with one another, instead access is controlled by
entries in the centralized directory database. Servers control this database.
