Final answer:
External roles in a customer service system like ServiceNow are intended for users outside the organization, such as partners or customers with administrative access. Roles like sn_customerservice.partner_admin and sn_customerservice.customer_admin are typically external, while a customer service agent would be internal.
Step-by-step explanation:
The question appears to be inquiring about roles within a customer service management system, particularly one that might be a part of ServiceNow, which is a cloud-based platform that automates enterprise IT operations. When discussing external roles, we're typically referring to user roles that are facing outside the organization, interacting with customers or partners rather than internal staff. sn_customerservice.partner_admin would be considered an external role as it is likely intended for partner company administrators to interact with your company's ServiceNow customer service system. In contrast, sn_customerservice.customer_admin might be an individual within the customer organization that has administrative rights. On the other hand, Customer service_agent would usually be an internal role as this individual would be part of the company providing services to the external customers.