Consider the network below, which shows four $10 \hspace{0.1cm} Mbps$ LANs connected by two bridges, labelled $B1$ and $B2$. Assume all users (labelled $1$ through $7$) are very chatty and equally chatty.
- What is the effective data rate seen by user $4$ ?
- What is the effective data rate seen by user $5$ ?
- What is the effective data rate seen by user $6$ ?
- What is the effective data rate seen by user $6$ if the two bridges are replaced with hubs ?
