I want to understand how an online port scanner works. How can it detect whether specific ports on my IP address are open or closed? Are there any tools that show both open ports and my public IP address in one place?
VPN Management Techniques
VPNs are available both commercially and as open source. Research the VPN solution of two IT solutions vendors. Be prepared to discuss both types. Discuss which solution you would recommend for a small business, and why. Explain each of the following VPN implementations: DMZ-based, bypass deployment, and internally connected