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IPv6 addresses are:

True or False: Circuit gateways operate at a higher layer than packet filters but lower than application gateways.

Forward secrecy is achieved primarily through:

Explain the key differences between authentication and authorization, and why confusing the two can lead to security vulnerabilities. Provide one concrete example.

Which protocol uses authenticated Diffie-Hellman to prevent man-in-the-middle attacks?

True or False: KEEP_ALIVE is enabled by default in most TCP implementations.

Compare ingress and egress filtering in packet-filtering firewalls. Using the DNS port 53 example, illustrate how a border firewall uses these rules to protect an internal trusted network.

True or False: Application-specific mechanisms such as SSL/TLS and S/MIME provide security at the network layer for all applications.

Which classification of firewall operates at the transport layer using IP addresses, ports, and TCP flags?

Which statement best describes why cryptography failures often occur?