Ahsun Taquveem Chohan

A- INTRODUCTION
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A-1. WHAT IS A DENIAL OF SERVICE ATTACK
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Denial of service is about without permission knocking off services, for example through crashing the whole system. This kind of attacks are easy to launch and it is hard to protect a system against them. The basic problem is that Unix assumes that users on the system or on other systems will be well behaved

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First of all , question is what is MAC address?

Mac address or media access control address, is a unique identifier assigned to most network adapters or network interface cards (NICs) by the manufacturer for identification. If assigned by the manufacturer, a MAC address usually encodes the manufacturer’s registered identification number. This is also known as physical address.

Now how to change MAC address?

Step1
Right click local area network choose support tab choose details.
Make a note of the Physical Address..
00-00-00-00-00-00..
The above is an example MAC address

Step 2
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You can easily and effectively block access to a website by adding it to your Windows HOSTS file. Without any software. Doesn’t matter what browser that you use.
1.Go to your HOSTS file which is located at:
C:WINDOWSSYSTEM32DRIVERSETC for windows Vista and XP
C:WINNTSYSTEM32DRIVERSETC for Windows 2k
C:WINDOWS for Windows 98 and ME

2. Open HOSTS with Notepad.
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