Inbound and outbound data packets are compared to determine if a connection should be allowed when using this method
a. Packet filtering
b. Proxy server
c. Stateful firewall
d. Access lists
c. Stateful firewall
Explanation: In a stateful firewall, the inbound and outbound data packets are compared to determine if a connection should be allowed. This includes tracking the source and destination port numbers, sequence numbers, and the source and destination IP addresses. In packet filtering, a limit is placed on the packets that can enter the network. Packet filtering can also limit information moving from one segment to another. A proxy server is used by clients to communicate with secure systems using a proxy. Essentially, the proxy server acts as an agent for handling requests from clients seeking resources such as access to the network.
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