Multi$-$Protocol Interaction and Performance Analysis

In a large enterprise network that uses both BGP $($Border Gateway Protocol$)$ and OSPF $($Open Shortest Path First$),$ the network has recently started experiencing significant congestion on certain routes, even though the TCP congestion control mechanism is active.

Describe how BGP and OSPF interact in this multi$-$protocol network and how their different routing paradigms might lead to congestion issues.

Propose an approach to diagnose and mitigate this congestion by making adjustments to both routing protocols and TCP configurations.

Explain how these adjustments would impact end$-$to$-$end data transmission efficiency and reliability across the network.