Technologies explained

Plain-language overviews of 67 products IT professionals work with every day: what each one is, its key features, and where to learn more.

All Microsoft Copilot & agentsChatGPT, Claude & promptingMicrosoft 365 securityActive Directory & domain controllersEntra join, hybrid join & MDMMicrosoft 365 & collaborationIdentity & Zero TrustThreat detection & responseASD Essential EightAzure & multi-cloudBackup & disaster recoveryTeams Phone & VoIPServers & virtualisationNetworking & firewallsStorage, hardware & CCTVEmail securitySQL Server, databases & ERPPowerShell & automationService desk & IT operations

Routing, switching & firewalls

Cisco and others, Networking & firewalls

The LAN, WAN and security devices every other system depends on.

  • VLANs, routing and switching
  • Site-to-site and remote access VPNs
  • Firewall rules and NAT
  • DNS, DHCP, BGP and core protocols
  • Wireless access points

Best for: Designing and troubleshooting networks.

Guides and scripts Official docs

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