6.5 Firewalls
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Which of the following is the best device to deploy to protect your private network from a public untrusted network?
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Firewall
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Which of the following are true of a circuit proxy filter firewall?(Select two)
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Operates at the Session Layer AND Verifies sequencing of session packets
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You have just installed a packet-filtering firewall on your network. What options will you be able to set on your firewall? Select all that apply.
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Source address of a packet, Destination address of a packet, AND Port Number
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When designing a firewall, what is the recommended approach for opening and closing ports?
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Close all ports; open only ports required by applications inside the DMZ
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You have a router that is configured as a firewall. The router is a layer 3 device only. Which of the following does the router use for identifying allowed or denied packets?
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IP address
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Which of the following are characteristics of a packet filtering firewall?(Select two)
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Stateless AND Filters IP address and port
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You have been given a laptop to use for work. You connect the laptop to your company network, use it from home, and use it while traveling. You want to protect the laptop from Internet-bases attacks. What solution should you use?
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Host based firewall
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Which of the following functions are performed by proxies?(Select two)
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Block employees from accessing certain Web sites AND Cache web pages
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You want to install a firewall that can reject packets that are not part of an active session. Which type of firewall should you use?
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Circuit-level
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You connect your computer to a wireless network available at the local library. You find that you can access all web sites you want on the Internet except two. What might be causing the problem?
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A proxy server is blocking access to the web sites
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Which of the following does a router acting as a firewall use to control which packets are forwarded or dropped?
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ACL
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Which of the following are characteristics of a circuit-level gateway?(Select two)
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Filters based on sessions AND Stateful
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Which of the following is a firewall function?
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Packet filtering
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Which of the following firewall types can be a proxy between servers and clients?(Select two)
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Application layer firewall AND Circuit proxy filtering firewall
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You provide Internet access for a local school. You want to control Internet access based on user, and prevent access to specific URLs. Which type of firewall should you install?
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Application level
