public String getProtocol() {
        return this.protocol;
    }
<p>
The network connection protocol observed in the activity that prompted GuardDuty to generate the finding.
</p>

@return The network connection protocol observed in the activity that prompted GuardDuty to generate the finding.
aws-java-sdk-guardduty/src/main/java/com/amazonaws/services/guardduty/model/DnsRequestAction.java