What is a key characteristic of external service activities in network planning?

A key characteristic of external service activities in network planning is that they involve third-party vendors. This aspect is crucial because external service activities are specifically designed to leverage the expertise and capabilities of vendors outside the organization to fulfill certain service requirements. Engaging third-party vendors allows businesses to access specialized services, utilize resources that may not be available internally, and often achieve more flexible and efficient operations.

By involving external vendors, organizations can focus on their core competencies while ensuring that other necessary services are provided by partners who are expert in those areas. This practice is common in various industries where outsourcing certain services can lead to cost savings, improved service levels, and flexibility in business operations.

In contrast, options that suggest internal resources, cost limitations, or restrictions to domestic operations do not accurately reflect the nature of external service activities. These activities are inherently about utilizing external capabilities rather than relying solely on internal resources, and they certainly incur costs based on the services rendered by third parties. Additionally, external service activities are not limited by geographic boundaries, allowing for global partnerships and collaboration.