1. Downward Communication
It flows from a higher authority to a lower authority. It can be oral and written.
Examples: orders, instructions, counselling.
2. Upward Communication
The flow of communication in the organization from lower levels to higher levels is called upward communication.
Examples: Reports, requests, proposals,
3. Horizontal or Lateral Communication
The flow of information between persons and departments of the same level is called horizontal communication.
Examples: •Inter-personal dialogue, inter-departmental memos, union-management meetings
4. Diagonal or Crosswise Communication
Diagonal communication takes place when the person working at a lower level with those working at a higher level across the limits of their reporting relationships.
Example: From production to Sales department.