You want to run a large network at your home and want to subnet it to separate your

work computers from your home equipment. Your ISP gave you a NAT box, and you

divided your network up as follows:

Your ISP has given you an IP address that you assign to NAT$-$o $($the outside or $$o$$

interface on the NAT box$)$ as well.

You know that RFC$1918$ specifies three different address ranges that you can use for

private addresses inside your home:

$10\mathrm{.}0\mathrm{.}0\mathrm{.}0-10\mathrm{.}255\mathrm{.}255\mathrm{.}255(10/8$ prefix$)$

$172\mathrm{.}16\mathrm{.}0\mathrm{.}0-172\mathrm{.}31\mathrm{.}255\mathrm{.}255(172\mathrm{.}16/12$ prefix$)$

$192\mathrm{.}168\mathrm{.}0\mathrm{.}0-192\mathrm{.}168\mathrm{.}255\mathrm{.}255(192\mathrm{.}168/16$ prefix$)$

$2/5$

$12$ d

$1$ d

$23$ d

$2$ d

$31$ d

$3$ d

$1$

$3$

$2$

d

a$)$ What may be the addresses you assign to subnets, routers, and NAT box inside home

using addresses from the $10.$x netblock?

b$)$ Give one reason that wide$-$spread deployment of IPv$6$ would let you get rid of the NAT

device.

c$)$ Give one reason that you might want to continue using the NAT even if IPv$6$ is

available.

d$)$ Assuming that the NAT box merely translates TCP and IP ports and addresses, give

an example of an application that would not work through this NAT, and very briefly

explain why.