3.0 INTRODUCTION AND 3.1 OBJECTIVES

 3.0 INTRODUCTION

The previous two units discussed about the fundamentals of information as well as network security issues which lead to different kinds of problem: attacks, theft of essential information and software vulnerabilities. In this unit, we shall learn about how to build a secure network. We shall also learn about the various parameters which must be considered for network security. There can be various security issues involved in small and medium sized businesses which require utmost attention for creating the secure network. Then we shall be covering different kind of tools available for network security, critical elements of network security like Firewall, password mechanisms, encryption, authentication & integrity etc. Lastly, we shall study about some secure network devices like secure modems. Let’s first study the basics of network and network security.

3.1 OBJECTIVES

After going through this unit, you should be able to:· understand the scope of network security;

  • · understand the various kind of threats to any network;
  • · understand Denial of Service attack and its counter measures;
  • · compare Network security with Computer security;
  • · understand the challenges to any business environment regarding the network;
  • · understand different security issues involved with small and medium sized businesses;
  • · understand the application of network security tools;
  • · understand firewall and its types;
  • · understand the password aging and password policy enforcement?;
  • · understand the basics of secure network devices; and
  • · understand the importance of network layout in network security; and

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