## Invitation to Computer Science 8th Edition

B should disassemble $\mathrm{M}(4)$ and check that it was correctly transmitted. If so, B should send an ACK(4) message to A; if not, B should discard the faulty message and wait for $\mathrm{A}$ to resend it.
B should disassemble $\mathrm{M}(4)$ and check that it was correctly transmitted. If so, B should send an ACK(4) message to A; if not, B should discard the faulty message and wait for $\mathrm{A}$ to resend it.