- UDP broadcasting and service discovery basics were covered in a previous article, including the NyanSD protocol.
- Feedback highlighted the importance of understanding broadcast addresses and IPv4 subnets.
- Subnets are defined by netmasks like /24 (255.255.255.0); the broadcast address is the last host ID in the subnet.
- The local broadcast address 255.255.255.255 can target the local network without requiring subnet calculation.
- Hardcoding a /24 broadcast address may fail on networks with different subnet configurations.
- Poco library's broadcastAddress() function was found broken on Windows, making manual calculation or local broadcast a better option.
- Comments discuss alternatives like raw Ethernet frames, CIDR, and the prevalence of non-/24 subnets in larger networks.