Wi$-$Fi Host A$,$ with MAC address WH$-$A$,$ sends a datagram with an HTTP request payload to google.com, MAC address G$-$M$.$ In the wireless network the access point has MAC address AP$-$M$,$ and is connected via Ethernet to the gateway router, MAC address GR$-$M$.$ In the IEEE $802\mathrm{.}3$ frame, the MAC address in the DESTINATION ADDRESS field is and the MAC address in the SOURCE ADDRESS field is a$.$ GR$-$M$,$ WH$-$A b$.$ WH$-$A$,$ GR$-$M c$.$ GR$-$M$,$ AP$-$M d$.$ AP$-$M$,$ G$-$M e$.$ WH$-$A$,$ G$-$M