Network Security

Network Security

Introduction:

A “Network” has been defined as “any set of interlinking lines resembling a net, a network of roads an interconnected system, a network of alliances.” This definition suits our purpose well: a computer network is simply a system of interconnected computers. How they're connected is irrelevant, and as we'll soon see, there are a number of ways to do this

Network Security:

Network security is the process of preventing and detecting unauthorized use of your network. Prevention measures help you to stop unauthorized users (also known as “intruders”) from accessing any part of your computer system.
Detection helps you to determine whether or not someone attempted to break into your system, if they were successful, and what they may have done.

Need of Network Security:

We use Network for everything from banking and investing to shopping and communicating with others through email or chat programs.

• Although you may not consider your communications "top secret," you probably do not want strangers reading your email. using your computer to attack other systems, sending forged email on your Network, or examining personal information stored on your Network.
• Protecting data from being read by unauthorized persons.
• Preventing unauthorized person from inserting or deleting messages.
• Verifying the sender of each message.


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