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9 Terms
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This device is a data link layer device. It is available either as a standalone or integrated with other devices, such as wireless routers or modems that can plug in physical devices. It keeps the traffic between the source and destination ports from interfering with other devices in the network.
Switch
2
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This device operates at the network layer and can connect your home network to the Internet. Or, in a business or institutional scenario, it can connect your webserver to your database server.
Router
3
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This can operate at multiple layers of the OSI model, including data link, network, transport, session, and application - and in certain circumstances, presentation as well.
Firewall
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At what layers does the firewall defines what traffic should go between two networks?
data link and network
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At what layer are the firewall filter settings are port-based?
transport
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The firewall that operates at the network and
transport layers is called what?
the Layer 4 firewall
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The firewall that works at the session, presentation, and application layers is what?
the Layer 7 firewall.
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What layer firewall is also smart enough to decrypt and analyze the content flowing through, thereby adding one more level of filtering to the IP address and port combination?
The Layer 7 firewall
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What is thus a powerful tool that can help prevent malicious attacks like Structured Query Language, also known as SQL injection, or other malware?