Question

A firewall may be implemented in

Answer 1

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A firewall may be implemented in routers which connected intranet to internet.

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Answer 2

Answer:

Explanation:

In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.

An external firewall is placed at the edge of a local or enterprise network, just inside the boundary router that connects to the Internet or some wide area network (WAN). One or more internal firewalls protect the bulk of the enter- prise network.