Computer Networking · Intermediate level

Intermediate level · Module 2 of 6 · 16 guided hours

DHCP, DNS and NAT

Configure and troubleshoot the core services every network depends on.

Learning objectives

  • Configure DHCP scopes, reservations and options
  • Explain DNS resolution and records
  • Configure NAT and port forwarding

Topics

  • DHCP process
  • scopes and reservations
  • DNS resolution
  • DNS record types
  • NAT and PAT
  • port forwarding risks

Lessons

  1. Lesson 1 DHCP in Depth

    Configure DHCP so devices get the right settings automatically.

    discover, offer, request, acknowledgescopereservationlease

  2. Lesson 2 DNS in Depth

    Understand how names become addresses and fix name resolution.

    resolverA and AAAA recordsCNAME and MXTTL and caching

  3. Lesson 3 NAT and Port Forwarding

    Connect private networks to the internet and publish services carefully.

    NATPATport forwardingexposure

Practical activity

Configure DHCP with reservations, a local DNS server and NAT in a lab or Packet Tracer and troubleshoot planted faults.

Expected outcomes

  • Reliable core services
  • Faster diagnosis of service faults

Assessment

Configuration and troubleshooting tasks checked.

Taught live by an instructor — online or in person. Free course lessons are for self-study and do not lead to a certificate — see registration options.