
Firewall:
A firewall is security software which imposes a set of protocols to prevent specific types of data from moving among trusted and untrusted level of networks.
Packet filtering firewall:
It is a network device from the types of firewall, which examines header of packets that transmits into a network and finds whether to drop it or forward it through next network based on its rules.
- It has separate subsets such as static packet filtering and dynamic packet filtering.
Static packet filtering:
It is a firewall, which requires configuration rules to be physically made, sequenced and altered within the firewall.
Dynamic packet filtering:
It is a firewall, which can control network traffic and make or alter the configuration rules to adapt.

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Chapter 6 Solutions
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