Your company installed firewalls in its computer system. How will this improve your company's computer security? $(1\mathrm{.}4\mathrm{.}1)$

Question $16$ options:

The firewall establishes encryption to decipher a computer system's information.

The firewall establishes a link between an employee's personal computer and an organization's intranet.

The firewall establishes two$-$factor authentication to access a computer system.

The firewall establishes a barrier between a network that is secure and one that is not secure$.$