SECURITY MODEL

More difficult to implement

firewalls and identity servers become the foundation of this model

protected assets are substantial, some users are not trustworthy

suitable for LANs / public WANs

ease of use for users diminishes as security tightens

need many train network administrator

user access is difficult and cumbersome

Most difficult to implement

all available security measures

all users are not trustworthy and that threars are frequent

protect assets are premium

Example : hardware (firewall)

The easiest implement

simple password

protected assets are minimal,user are trusted and threars are minimal

Suitable for LANs /public WANs that are not connected to the Internet

Example: hardware (router,switch)