Take a look at the table below. This is a standard network connection grid that you will be using in the future for all of your network programming. Notice we are using different subnet masks on the routers$-$ we will be using VLSM $($Variable Length Subnet Mask$),$ a technique that allows network administrators to divide an IP address space into subnets of different sizes, rather than dividing it into subnets of the same size.

System Port Connect To IP address Subnet Mask Clock Rate Users

$-$R$1$

G$0/0/1$

CSU$-$DSU

$11\mathrm{.}0\mathrm{.}0\mathrm{.}27$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}0$

G$0/0/0$ Wi$-$Fi Router

$10\mathrm{.}27\mathrm{.}1\mathrm{.}189$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}2521$

S$0/1/0$

R$2$

$10\mathrm{.}27\mathrm{.}1\mathrm{.}177$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

$500000$

S$0/1/1$ R$310\mathrm{.}27\mathrm{.}1\mathrm{.}186255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

$-$R$2$

S$0/1/0$

R$3$

$10\mathrm{.}27\mathrm{.}1\mathrm{.}181$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

$500000$

S$0/1/1$ R$110\mathrm{.}27\mathrm{.}1\mathrm{.}185255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

G$0/0/0$ MLSW$110\mathrm{.}27\mathrm{.}1\mathrm{.}193255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

$-$R$3$

S$0/1/0$

R$1$

$10\mathrm{.}27\mathrm{.}1\mathrm{.}171$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

$500000$

S$0/1/1$ R$210\mathrm{.}27\mathrm{.}1\mathrm{.}161255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

G$0/0/0$ MLSW$210\mathrm{.}27\mathrm{.}1\mathrm{.}197255\mathrm{.}255\mathrm{.}255\mathrm{.}252$