In this video I explain how DHCP work and how it updates DNS entries for new hosts joining the network. I'll also mention Zero Config

0:00 Intro

1:00 the Network configuration

6:00 Showing DHCP in Wireshark

6:30 DHCP Discover

14:40 DHCP Offer

19:00 DHCP Request

21:30 DHCP ACK

22:00 How DHCP Updates DNS

26:15 Zero Configuration (mDNS, Link-local)

Resources

Dhcp https://datatracker.ietf.org/doc/html/rfc1541

Dynamic updates , dhcp RFC2136

https://datatracker.ietf.org/doc/html/rfc2136

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/xe-3se/3850/dhcp-xe-3se-3850-book/dhcp-client-option-12.pdf

RFC 1497

https://www.rfc-editor.org/rfc/rfc1497.html

https://www.rfc-editor.org/rfc/rfc6762#ref-Zeroconf

Link-local

https://www.rfc-editor.org/rfc/rfc3927