Consider three LANs interconnected by two routers, as shown in the Figure below.

Interfaces in Subnet $1$ have addresses of the form $192\mathrm{.}168\mathrm{.}101/24$; Interfaces in Subnet

$2$ uses addresses of the form $192\mathrm{.}168\mathrm{.}102/24$; Interfaces in Subnet $3$ use addresses of

the form $192\mathrm{.}168\mathrm{.}103/24.$ Each adapter has also a MAC address.