This document discusses different types of communication networks within an organization:
1. Internal communication occurs within the organization, such as between a teacher and student.
2. External communication links the organization to outside entities, like between heads of two organizations.
3. Vertical communication flows up and down the hierarchy, including downward communication from managers to subordinates and upward communication with feedback from subordinates to managers.
4. Horizontal communication occurs between peers of equal rank in an organization.
5. Diagonal communication combines vertical and horizontal flows across different levels and departments in an organization.