Chapter 6, Problem 8RQ

Program Plan Intro

Firewall:

A firewall is security software which imposes a set of protocols to prevent specific types of data from moving among trusted and untrusted level of networks.

• Types of firewalls that are commonly used are:
  • Application layer proxy firewalls
  • Hybrid firewalls
  • Packet filtering firewalls
  • Media access control layer firewalls

OSI Model:

OSI model stands for “Open System Interconnection” reference model, a conceptual framework to understand how applications can interconnect over a network.

• It splits network interaction into seven different layers, they are:
  • Application
  • Presentation
  • Session
  • Transport
  • Network
  • Data Link
  • Physical