dns cybrary

Domain Name System (DNS)

A Domain Name System (DNS) is essentially the ‘phonebook’ of the Internet. DNS is an elaborate, fault-tolerant way of connecting people to resources online.  While it is quite complex, this …

spf cybrary

Sender Policy Framework (SPF)

Sender Policy Framework (SPF) is an anti-spam tool where email domains of the senders can be authenticated. SPF works hand-in-hand with DKIM and DMARC to help authenticate email messages to …

DKIM

DKIM (DomainKeys Identified Mail) is an email authentication tool that verifies messages are sent from a legitimate user’s email address. It’s designed to prevent email forgery and spoofing; essentially phishing. …