Technology: Networking and Security

What is a Port 443? What is Port 443 used for? An in-depth explanation of how HTTPS Port 443 works and keeps your information secure.

What is a PBX Phone System? Types of PBX Phone System. IP PBX and Hosted PBX phone system. How does the PBX system work?

What is ISDN, and how does it work? What are ISDN’s advantages and drawbacks? ISDN architecture and alternative explained.

What is Fully Qualified Domain Name (FQDN) mean and used for? What is Partially Qualified Domain Name (PQDN) mean and different from FQDN?

What is SSH, and where to use the secure shell? Understanding how to use secure shell network protocol between client and host.