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CHAPTER 3.1 DHCP - Coggle Diagram
CHAPTER 3.1 DHCP
DHCP Basics
Dynamic Host Configuration Protocol
Client–Server model
Automates network configuration
Assigns IP address & network settings
Reduces manual configuration
DHCPOFFER
Server → Client
Offers IP configuration
IP address
Subnet mask
Gateway
Other DHCP messages:
DHCPNAK → Request rejected
DHCPDECLINE → IP already in use
DHCPINFORM → Request other network settings
DHCPRELEASE → Terminate IP lease
DHCP Scopes
Range/pool of available IP addresses
Determines IPs assigned to clients
Must be defined & activated
Multiple scopes can be configured
DHCP Lease
IP assigned for a limited time
Lease expires → IP can be reassigned
Client renews lease
Renewal uses DHCPREQUEST + DHCPACK
Multicast Scope
Used for multicast applications
One address → group of subscribed clients
Example: Windows Deployment Services (WDS)
Uses MADCAP for automatic multicast address allocation
Superscope
Combines multiple DHCP scopes
Useful when one scope runs out of addresses
Provides additional IP addresses
DHCPREQUEST
Client accepts an offer
Requests selected configuration
DHCPACK
Server confirms/acknowledges
Client can use the configuration
Server Authorization
Register DHCP Server in Active Directory
Allows server to process client requests
Required when DHCP Server is an AD domain member
DHCP Server Configuration
DHCP Address Assignment — DORA
DHCPDISCOVER
Destination: 255.255.255.255
Source: 0.0.0.0
Broadcast
Client → Server