For a CIDR $/28$ network, the binary subnet mask is

$11111111\mathrm{.}11111111\mathrm{.}11111111\mathrm{.}11111100$

$11111111\mathrm{.}11111111\mathrm{.}11111111\mathrm{.}11111000$

$11111111\mathrm{.}11111111\mathrm{.}11111111\mathrm{.}11110000$

$11111111\mathrm{.}11111111\mathrm{.}11111111\mathrm{.}11100000$

Question $21(1$ point$)$

CHAP is

Challenge$-$Handshake Authentication Protocol

Computed Hash Algorithm Protocol

Complex Hash Authentication Protocol

Computed$-$Handshake Algorithm Protocol