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

a$.$ Assign IP addresses to all interfaces. Subnets $1,2,$ and $3$ have network$/$subnet prefixes

$10\mathrm{.}10\mathrm{.}0\mathrm{.}0/24,10\mathrm{.}10\mathrm{.}1\mathrm{.}0/24,$ and $10\mathrm{.}10\mathrm{.}3\mathrm{.}0/24,$ respectively.

b$.$ Assign MAC addresses to all adapters. The MAC addresses for all hosts$$ NICs start with

vendor ID $00-11-75,$ and those for routers start with vendor ID $00-02-17.$

c$.$ Consider sending an IP datagram from Host E to Host B$.$ If the ARP tables in all hosts and

routers are up to date and all hosts know their default gateways, enumerate the steps in sending

the datagram. $[$See Section $6\mathrm{.}4\mathrm{.}1$Sending a Datagram off the Subnet$$ for an example.$]$

d$.$ What additional steps are needed if the ARP table in the sending host is empty $($and the other

tables are up to date$)?$