Philosophy/ English
Tommy888
FirewallDefinitionInfographicfinal.pptx
What Is A Firewall?
A piece of hardware or software that is used to protect a computer that is connected to the internet
Hardware firewalls
Software firewalls
Physical devices
Usually built into a router or switch
Generally network based (protecting all devices on a network)
Pieces of software
More flexible than hardware firewalls
Oftentimes host based (protecting a single device on the network)
History
Originally, the term referred to a fire-retardant wall in a building that served as a barrier to fires. With the increasing use of computers in the 1980s and 90s, the meaning of the term shifted to its contemporary definition.
FIREWALLS
Hardware firewalls
Software firewalls
Physical devices
Usually built into a router or switch
Generally network based and packet filtering
Pieces of software
More flexible than hardware firewalls
Oftentimes host based
History
Originally, the term was used to mean a fire-retardant wall in a building that was used as a barrier to fires.
FIREWALLS
A firewall protects devices or LANs by controlling packets traveling over the LAN or connections between devices on the LAN and devices on the WAN
Packet filtering firewalls filter packets based on a set of rules
Packet filtering router
Incoming packets
Harmful packets rejected
Approved packets accepted
Circuit level gateways monitor connections between devices on opposites sides of the firewall
Stateful multilayer inspection firewalls are sometimes referred to as “next generation” firewalls
FIREWALLS
