OSPF hello packet question
In reference to the above drawing, which routers are going to send OSPF hello packet and to whom?
My understanding; Ospf hello packet is used to build and maintain adjacencies.
RTA will send to and receice from RTB
RTB will be sending and recieving from both RTA and RTC
RTC will send to and recieve from RTB
In any case will hello packet be used between RTA and RTC (I mean how are LSA sent, do they use Hello Protocol or are they just a regular IP packet)
Thanks in advance....