What is a snapshot (virtualization)?

A snapshot – of a virtual machine – is a file-based representation of the state of the virtual machine at a given time.

It includes disk data and configuration data of the VM.

With a snapshot you can restore a machine to a previous state.

What is SSL?

Secure Socket Layer (SSL) is a cryptographic protocol developed to allow secure communication over the Internet.

What is SSH?

Secure Shell (SSH) is a network protocol for remote command execution and data communication adopted on Unix and Linux operating systems.

SSH is a cryptographic protocol and can estabilsh a secure communication channel over a not-secure network.

For this reason is widely adopted for the remote administration of Unix and Linux servers.

What is SQL Server?

SQL Server is relational database manament system developed by Microsoft.

It’s a database and so it’s main scope is to store and retrieve data requested by applications running on the same machine or other machines.

SQL Server is available as an installation package – or included in some Windows editions – and as a cloud solution on Azure.