What DHCP is all About Network Fundamentals Part 16

What DHCP is all About Network Fundamentals Part 16
DHCP, or Dynamic Host Control Protocol, is used to dynamically assign IP addresses, and other information called options, to network devices.
As devices start up (and at some other times) they broadcast a DISCOVER message, which is seen by the DHCP server. The DHCP server finds an available IP address, and sends it back in an OFFER message.
The client will see this, and maybe more OFFERs, and choose one. It will send a REQUEST message to the server, which will confirm the IP allocation with an ACKNOWLEDGE message.
When IP’s are assigned to devices, they’re given a lease. This is the time they’re valid for. When 50% of a lease expires, the client will try to renew the lease. It will often get the same IP that it had, but there is no guarantee, and may get something else.
As DISCOVER messages are broadcasted, they only reach the local LAN segment. To extend DHCP services beyond the local segment, we can configure a DHCP relay on a router or switch. This can intercept the DISCOVER message and forward it to the server.
Quiz: link: https://networkdirection.net/labsandquizzes/quizzes/dhcp-quiz/
Lab Link: https://networkdirection.net/labsandquizzes/labs/lab-dhcp/
Patreon information: https://networkdirection.net/patreon/
For more information on the DHCP frame format, I highly recommend: https://www.netmanias.com/en/post/techdocs/5998/dhcp-network-protocol/understanding-the-basic-operations-of-dhcp
In the next video, we’re going to have a look at DNS.
Overview of this video:
0:00 Introduction
0:32 The DHCP Process
3:08 Leases
5:02 Options
6:09 Quiz 1
6:20 DHCP Relays
7:50 Lab
15:39 Quiz 2
LET'S CONNECT
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