I am studying the basics of BGP and my book states the following:
"BGP sessions use TCP port 179. TCP allows for adjacencies that are multiple hops away"
I understand that this allows routers that are not directly connected to eachother to form adjacencies but how exactly does TCP accomplish this?
Other IGP's hellos are not forwarded anywhere else except for the local segment (they're single-hop, if I can call them like that, even if we statically configure the neighbors), but BGP achieves multi-hop adjacencies using TCP? How?
Thank you in advance for your help