Why Can We Not Ping Microsoft.com, Amazon.com, Or Other Site?

Hello Friends,Some popular sites such as amazon.com, microsoft.com, slashdot.org, and other sites that have had DoS attacks in the past may disable ICMP(Internet Control Message Protocol) on their servers and setup other network settings that prevent a ping request be received or responded to. Because of this when you ping these domain names or their associated IP addresses you'll receive a "Request timed out." or get a "100% packet loss."

THANKS FRIENDS.........