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11 Why does DHCP use raw sockets?

The DHCP protocol has some specific requirements to really work properly - in particular being able to transmit to and receive packets sent to the all-ones limited broadcast address (, and being able to send a unicast without an ARP. It's…

12 Synchronous Disk Writes and DHCP Performance Limitations

Problem: DHCP performance can be limited by disk I/O. Every lease issued by the DHCP server (every DHCP ACK) incurs a write to the dhcpd.leases file. Messages sent to syslog are generally written at some point to a system log file. Modern I/O devices vary…