Which is not a step of the DHCP process?

Which is not a step of the DHCP process?

• Request
• Discovery
• Acknowledge
• SYN/ACK 

EXPLANATION

DHCP stands for Dynamic Host Configuration Protocol. DHCP used to provide IP addresses to different Hosts or Client machines present in a Network.
DORA is nothing but a sequence of messages which is exchanged between the DHCP Server and Client. DORA stands for mentioned messages :

• Discover
• Offer
• Request
• Acknowledgment