Authors:
James F. Kurose, Keith W. Ross
Chapter:
Network Management
Exercise:
Problems
Question:1 | ISBN:9780132856201 | Edition: 6
Question
Consider the two ways in which communication occurs between a managing entity and a managed device: request-response mode and trapping. What are the pros and cons of these two approaches, in terms of (1) overhead, (2) notification time when exceptional events occur, and (3) robustness with respect to lost messages between the managing entity and the device?
Answer
The pros and cons of Request-response mode and Trapping is as follows:
|
Terms |
Request-response |
Trapping |
| 1) Overhead | High overhead | Less Overhead |
| 2) Notification time | If exception events occure, then manager should need to wait for half of the polling cycle on an average. | If exception events occure, then Trapping immediately notify to the manager. |
| 3) Robustness | Robustness with respect to lost messages between the managing entity and the device, then a poll message or the response message is lost. | Robustness with respect to lost messages between the managing entity and the device, a trap message is lost, the managed device will not send another copy. |