1
00:00:00,270 --> 00:00:06,480
There are several advantages and disadvantages to why you'd want to use a query based network management

2
00:00:06,480 --> 00:00:14,060
protocol firstly query based protocols are reliable because it's query based.

3
00:00:14,120 --> 00:00:21,800
The network management station is querying or asking for information from a network device.

4
00:00:21,920 --> 00:00:27,920
If the enemies doesn't receive a response from the device that indicates a problem.

5
00:00:28,190 --> 00:00:34,220
The fact that the enemies made a query and didn't get back a response indicates that there is a problem

6
00:00:34,220 --> 00:00:35,570
on the network.

7
00:00:35,960 --> 00:00:43,730
So no response equates to a problem query based also called polling based network management protocols

8
00:00:44,030 --> 00:00:48,200
can be scheduled and you can set how frequently that's done.

9
00:00:48,590 --> 00:00:55,460
So you could pull the network on a very frequent basis or pull the network less frequently to reduce

10
00:00:55,460 --> 00:00:58,040
the impact of the queries on the network.

11
00:00:58,340 --> 00:01:05,420
As an example you may not necessarily want to query a network device every five seconds because of the

12
00:01:05,420 --> 00:01:07,960
overhead that you're putting on the network.

13
00:01:08,090 --> 00:01:16,040
Now in Orion Network Performance Monitor or Ryan NPM also referred in this course to as solar winds

14
00:01:16,040 --> 00:01:24,300
NPM the default setting is two minutes for query based polls for status information and nine minutes

15
00:01:24,300 --> 00:01:32,450
for query based polling for statistics Orion NPM uses both to query and event based protocols.