You have the net address $17\mathrm{.}23\mathrm{.}2\mathrm{.}20$

Which of the given entries may be a subnet mask for this network: You have the net address $17\mathrm{.}23\mathrm{.}2\mathrm{.}20$

Which of the given entries may be a subnet mask for this network:

$255\mathrm{.}255\mathrm{.}255\mathrm{.}224$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}248$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}32$

$255\mathrm{.}255\mathrm{.}255\mathrm{.}193$

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

$255\mathrm{.}255\mathrm{.}255\mathrm{.}112$

none of the above