Sophos Support Fundamentals: Domain Name Systems

Emmanuel from Sophos Support explains the fundamental concepts of Domain Name Systems (DNS). This is a high-level overview, so check out the relevant resources for more information.

Skip ahead to these sections:
00:11 Overview
00:40 DNS Overview
01:43 DNS Components & Resolution
03:02 Client-Server Model
04:04 DNS Structure & Hierarchy
05:39 DNS Zones
06:33 Query Process & Types
09:01 DNS Forwarders & Time to Live
09:43 Common Resource Records

Relevant Resources:

How DNS Works:

DNS for Dummies:

Sophos Firewall DNS Information:

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