public String getProtocol() {
        return this.protocol;
    }
<p>
The protocol that was used for the DNS request.
</p>
<p>
Length Constraints: Minimum length of 1. Maximum length of 64.
</p>

@return The protocol that was used for the DNS request.</p>
        <p>
        Length Constraints: Minimum length of 1. Maximum length of 64.
aws-java-sdk-securityhub/src/main/java/com/amazonaws/services/securityhub/model/DnsRequestAction.java