E2C09

What type of equipment is commonly used to implement an amateur radio mesh network?

1. AA 2-meter VHF transceiver with a 1,200-baud modem
2. BA computer running EchoLink to provide interface from the radio to the internet
3. CA wireless router running custom firmware
4. DA 440 MHz transceiver with a 9,600-baud modem

Pick an answer to check it.