Explain the role and function of network components

$1\mathrm{.}1.$a Routers

$1\mathrm{.}1.$b Layer $2$ and Layer $3$ switches

$1\mathrm{.}1.$c Next$-$generation firewalls and IPS

$1\mathrm{.}1.$d Access points

$1\mathrm{.}1.$e Controllers $($Cisco DNA Center and WLC$)$

$1\mathrm{.}1.$f Endpoints

$1\mathrm{.}1.$g Servers

$1\mathrm{.}1.$h PoE