What is the C-V2X (Cellular Vehicle-to-Everything) technology and how does it differ from DSRC for connected vehicle applications?

1. C-V2X uses cellular LTE/5G networks for vehicle communication while DSRC uses dedicated 5.9 GHz radio; both support SPaT/MAP messaging
2. C-V2X is only for vehicle-to-vehicle communication while DSRC handles infrastructure
3. C-V2X requires subscription fees while DSRC is always free
4. There is no difference — they are the same technology with different names