Home » Cisco » 200-201 v.2 » At which layer is deep packet inspection investigated on a firewall?
At which layer is deep packet inspection investigated on a firewall?
A. internet
B. transport
C. application
D. data link
Correct Answer: C
Explanation/Reference:
Explanation:
Deep packet inspection is a form of packet filtering usually carried out as a function of your firewall.
It is applied at the Open Systems Interconnection’s application layer. Deep packet inspection evaluates the contents of a packet that is going through a checkpoint.