What items does a firewall use to decide whether to allow or
deny communication traffic.
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What items does a firewall use to decide whether to allow ordeny communication traffic.
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FIREWALL A firewall is a system that provides network security bt filtering the incoming and outgoing network traffic based on a set of userdefined rules In general the purpose of a firewall is to reduse or eliminate the occurrence of unwanted network communications while allowing all legitimate communication to flow freely In most server infrastructures firewall provide an essential layer of security that combined with other measures prevent attackers from accessing the servers in malicious way Types of Firewalls There were three types of network firewalls They are as follows Packet filtering stateless firewalls It work by inspecting individual packets in isolation As such they are unaware of connection state and can only allow or deny packets based on individual packet headers Stateful firewalls They are able to determine the connection state of packets which makes them much more flexible than stateless firewalls They work by collecting related packets until the connection state can be determined before any firewall rules are applied to the traffic Application firewalls They go one step further by analysing the data being transmitted
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