The owner of a small loan brokerage firm does not know much about computers but has always been concemed with security, so he buys a used enterprise grade router. Mango, a loan officer with a little bit of IT knowledge, configures FE$80$::$1$ as the only address on the internal interface of the router. What effect will this have?

a$.$ Internet access will now be suppressed.

b$.$ Security will be dramatically improved.

c$.$ NAT will translate it to a public address.

d$.$ Nothing because the address is routable.