Unencrypted network traffic is most likely to be found in B. IoT (Internet of Things). Many IoT devices, especially low-cost or low-power ones, often transmit data without encryption, which can make them vulnerable to interception. This is a common security concern in the IoT ecosystem.
A. SDN (Software-Defined Networking): Typically uses encrypted communication protocols, especially for control planes.
C. VPN (Virtual Private Network): VPNs are designed to encrypt traffic to protect data transmission.
D. SCADA (Supervisory Control and Data Acquisition): While SCADA systems are critical and often operate on specialized protocols, modern implementations are increasingly using encryption to secure communications, although older systems may still have vulnerabilities.
So, IoT stands out as the most likely for unencrypted traffic.
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