android - How does chromecast connects to other devices? -

android - How does chromecast connects to other devices? -

how devices chromecast discovered other devices without connecting same local network. aware of protocols ssdp, dial, , mdns, of protocols require connected same local network.

for example, when plug in chromecast , begin initial setup, somehow connect chromecast using device (mac, android, iphone). 1 time connect chromecast, start filling out wifi credentials can connect chromecast network. 1 time chromecast connects wifi, can utilize of protocols above.

so question is, how connect chromecast device, without chromecast knowing local network?

when first connect chromecast, sets temorary wifi access point. chromecast setup application (whether on windows, mac, or android) looks ssid , connects automatically (whether realize or not--- @ wifi ssid , see change). 1 time come in credentials wifi connection, chromecast connects wifi network , turns off it's inbuilt wifi network.

your laptop/device connected original wifi network , chromecast connected network. result, available dlna device , available see other network devices.

android ios udp chromecast ssdp