E2C09 — Amateur Extra Class

E2C09 : What type of equipment is commonly used to implement an amateur radio mesh network?
A A 2-meter VHF transceiver with a 1,200-baud modem
B A computer running EchoLink to provide interface from the radio to the internet
C A wireless router running custom firmware
D A 440 MHz transceiver with a 9,600-baud modem
Correct Answer: A wireless router running custom firmware