Network layer firewall works as a ________(a) frame filter(b) packet filter(c) signal filter(d) content filterThe question was posed to me in homework.Origin of the question is Security In The Internet topic in section Networking of Computer Network

Network layer firewall works as a ________(a) frame filter(b) packet f

1.	Network layer firewall works as a ________(a) frame filter(b) packet filter(c) signal filter(d) content filterThe question was posed to me in homework.Origin of the question is Security In The Internet topic in section Networking of Computer Network
Answer» Right ANSWER is (b) packet filter For explanation I would say: As you know, firewalls are available as hardware appliances, as software-only, or a combination of the two. In every case, the purpose of a firewall is to isolate your trusted internal network (or your PERSONAL PC) from the dangers of unknown resources on the Internet and other network connections that MAY be harmful. The firewall prevents unauthorized access to your internal, trusted network from OUTSIDE threats.

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