question senario in the photo $.$Use the network address $105\mathrm{.}0\mathrm{.}0\mathrm{.}0/16$ to subnet the following network. Assume all routers have a LAN each of size $100$ hosts. Assume Router ONE and THREE are ISPs.$[$CO$3]$ On how many routers do you need to set up default routes?

$[$CO$3]$ On how many routers can you set up floating routes?

$[$CO$3]$ Total of how many standard static routes you need to set up in all the routers? $**$Consider WANs and SWITCHED networks as well.

$[$CO$3]$ Set up a directly attached default static route on Router FOUR. Write the command only.

$[$CO$3]$ Set up a floating default static route on Router FOUR. Write the command only. $($has a mistake$)$

$[$CO$3]$ How many networks does R$3$ learn about before configuring static routes?

$[$CO$3]$ Given R$1$ and R$2$ is connected to R$0.$ Summarize the following static routes for R$0$:

R$1$: $172\mathrm{.}16\mathrm{.}15\mathrm{.}0/26,172\mathrm{.}16\mathrm{.}3\mathrm{.}0/26,172\mathrm{.}16\mathrm{.}5\mathrm{.}0/26,172\mathrm{.}16\mathrm{.}7\mathrm{.}0/26$

Answer in the format: x$.$x$.$x$.$x$/$y where x is decimal value and y is the prefix mask.

$[$CO$3]$ Continued from the previous question. Summarize the following static routes for R$0$:

R$2$: $172\mathrm{.}16\mathrm{.}13\mathrm{.}0/26,172\mathrm{.}16\mathrm{.}2\mathrm{.}0/26,172\mathrm{.}16\mathrm{.}6\mathrm{.}0/26,172\mathrm{.}16\mathrm{.}11\mathrm{.}0/26$

Answer in the format: x$.$x$.$x$.$x$/$y where x is decimal value and y is the prefix mask.

$10$ points

$[$CO$2]$ Do the above two routes cause any issues for R$0?$

Yes

No

Explanation $(1)$:

Given, the following entries in a routing table:

C $172\mathrm{.}16\mathrm{.}1\mathrm{.}0$ is directly connected, f$0$

C $172\mathrm{.}16\mathrm{.}2\mathrm{.}0$ is directly connected, s$0$

S $172\mathrm{.}16\mathrm{.}3\mathrm{.}0$ via $[23/0]$ via $172\mathrm{.}16\mathrm{.}1\mathrm{.}1$

S$*0\mathrm{.}0\mathrm{.}0\mathrm{.}0$ via $[1/0]$ via $172\mathrm{.}16\mathrm{.}2\mathrm{.}3$

$[$CO$2]$ Which entries are recursively configured?

C $172\mathrm{.}16\mathrm{.}1\mathrm{.}0$ is directly connected, f$0$

C $172\mathrm{.}16\mathrm{.}2\mathrm{.}0$ is directly connected, s$0$

S $172\mathrm{.}16\mathrm{.}3\mathrm{.}0$ via $[23/0]$ via $172\mathrm{.}16\mathrm{.}1\mathrm{.}1$

S$*0\mathrm{.}0\mathrm{.}0\mathrm{.}0$ via $[1/0]$ via $172\mathrm{.}16\mathrm{.}2\mathrm{.}3$

$[$CO$2]$ Which entries are backup routes?

C $172\mathrm{.}16\mathrm{.}1\mathrm{.}0$ is directly connected, f$0$

C $172\mathrm{.}16\mathrm{.}2\mathrm{.}0$ is directly connected, s$0$

S $172\mathrm{.}16\mathrm{.}3\mathrm{.}0$ via $[23/0]$ via $172\mathrm{.}16\mathrm{.}1\mathrm{.}1$

S$*0\mathrm{.}0\mathrm{.}0\mathrm{.}0$ via $[1/0]$ via $172\mathrm{.}16\mathrm{.}2\mathrm{.}3$

None

Why does static routes have the value of zero as the cost metrics and one as the administrative distance?