Secure Socket Shell (SSH) allows two separate computer systems — client and server — to access one another remotely. It functions using PKI (public key infrastructure) to combine a public and private encryption key to authenticate connections. SSH is used to improve the security in SFTP, a secure file transfer protocol, by encrypting command codes on the network.
How do you know which domain registration service to choose? Start by using an accredited ICANN registrar, like pair Networks®. Anyone can slap a Whois search box on their Web site to check domain name availability. But only companies that have been accredited by ICANN can actually register your domain name.
Dynamic domain name services provide a client application that's downloaded to your computer. That app allows you to set up and access a domain on a computer that has a changing IP address. Most home devices do not have dedicated IP addresses, but are provided a rotating IP by their Internet Service Provider (ISP).