what is considered layer 3 protocols?
Notes to self
Distance-vector routing protocols - ROUTING in the name (layer 3)
to read : https://www.indeed.com/career-advice/career-development/routing-protocols
OSPF
RIP - https://networkengineering.stackexchange.com/questions/6330/at-which-osi-layer-does-rip-work "All IGP (Interior gateway protocols) routing protocols works at layer 3. External BGP works at layer 4, while internal works at layer 3."