What is netstat command for?
*The NETSTAT command is designed to help you quickly determine whether or not TCP/IP is working correctly. If TCP/IP is having problems, then NETSTAT can help you to determine where the problem is.
What is VPN?
*A virtual private network (VPN) is a private communications network often used within a company, or by several companies or organizations, to communicate confidentially over a public network.
What are 7 layers of OSI model?
*Application
*Presentation
*Session
*Transport
*Network
*Data-link
*Physical
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