16.2.7 FOR THE PACKETS GOING LEFT-TO-RIGHT, WITH THOSE ADDRESSES R...
172.16.2.7 for the packets going left-to-right, with those addresses reversed for the
ping reply packets that go right-to-left. The MAC addresses always represent the
addresses of the devices on that local LAN. Note that HDLC, on the serial link, does
not use MAC addresses.
Chapter 16
“Do I Know This Already?”