Module 7
Network Services - DHCP and DNS
The two services every network runs, how they work, and how to tell which of them is actually broken.
In this module
- Trace a DHCP lease from discover to acknowledge
- Explain why a wrong DHCP option imitates a routing fault
- Resolve a name and prove whether DNS or reachability is at fault
Activities
DHCP - addresses without configuring them
The four-message exchange, and everything else a lease carries.
Lab: hand out addresses
Configure a DHCP server and watch a client take a lease.
Lab: everyone can reach everyone, and nothing else
A whole subnet with working local traffic and no route out. The router is fine.
DNS - names into addresses
How a name becomes an address, and what caching does to your day.
Lab: stand up a resolver
Bring up a DNS service and prove that names resolve.
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Curriculum topics
Each topic page lists every lesson, quiz and hands-on lab that covers it, plus how it maps onto the CCNA and Network+ blueprints.