Final answer:
During an incident, external communications are typically with Law Enforcement, Vendors, and Information Sharing Partners, and not with the perpetrator of the incident.
Step-by-step explanation:
During an incident, various stakeholders may need to be communicated with externally. However, the perpetrator is generally not one of them. The main targets for external communications usually include Law Enforcement, with the purpose of reporting the incident and seeking assistance; Vendors, especially if their services or products are implicated in the incident or if they can provide support in resolving it; and Information Sharing Partners, which are organizations that collaborate in sharing information related to security threats and incidents. Communicating with the perpetrator is not only unproductive but could also compromise legal proceedings or further aggravate the incident.