Q57

Consider three IP networks $A, B$ and $C$. Host $H_A$ in network $A$ sends messages each containing $180$ $bytes$ of application data to a host $H_C$ in network $C$. The TCP layer prefixes $20$ byte header to the message. This passes through an intermediate network $B$. The maximum packet size, including $20$ byte IP header, in each network, is: $A:$ $1000$ $\text{bytes}$ $B: 100$ $\text{bytes}$ $C: 1000$ $\text{bytes}$ The network $A$ and $B$ are connected through a $1$ $Mbps$ link, while $B$ and $C$ are connected by a $512$ $Kbps$ link (bps = bits per second).

What is the rate at which application data is transferred to host $H_C$? Ignore errors, acknowledgments, and other overheads.