Explanation:
Encrypting the data will obfuscate the data so that they are not visible in plain text. Someone would have to collate the entire data stream and try decrypting it, which is not easy. Passwords can be recovered by brute-force attacks and by password crackers, so this is not the best defense against sniffing. IP addresses can always be discovered, even if dynamic IP addresses are implemented. The person sniffing traffic can initiate multiple sessions for possible IP addresses. Setting static mandatory access control (MAC) addresses can prevent address resolution protocol (ARP) poisoning, but it does not prevent sniffing.