NETWORK SECURITY
FIREWALLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A proxy server operates at the Application layer, while a packet filtering firewall operates at the Network layer.
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A proxy server includes filters for the session ID as well as the IP address and port number.
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A proxy server can prevent unknown network attacks, while a packet filtering firewall can only prevent known attacks.
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A proxy server is used to create a DMZ, while a packet filtering firewall can only be used for screened subnets.
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Detailed explanation-1: -A proxy server can prevent unknown network attacks, while a packet filtering firewall can only prevent known attacks.
Detailed explanation-2: -A firewall uses and blocks the IP packets and proxy server uses the client-side requests for the connections. A firewall will allow and filter the packets coming and going out of the network. Whereas, the proxy server will route and control the application-level traffic.
Detailed explanation-3: -A firewall and a proxy server are both parts of a network’s security. Firewalls can prevent unauthorized access to your computer by blocking ports and programs, whereas proxy servers effectively hide your internal network from the Internet.
Detailed explanation-4: -The application layer proxy firewall is different from a packet-filtering firewall because it uses the nature of the applications running like timing of the network connection requests and the type and nature of the traffic generated.
Detailed explanation-5: -Network Security While a packet filtering firewall only examines an individual packet out of context, a stateful firewall is able to watch the traffic over a given connection, generally defined by the source and destination IP addresses, the ports being used, and the already existing network traffic.