Windows Task MangerTab Networking - Network Utilization jumps to 97%

Looking at Windows Task MangerTab NetworkingAbout every 7 minutes the Network Utilization jumps to 97%. I am trying to figure out why. However, I feel like I am looking for a needle in a haystack. I have tried performance monitor and SQL Server Profiler. Perhaps I am using the wrong tools or the wrong counters. Can anyone provide assistance? Which tool and counters should I be looking at?

This is the traffic passing through the network card, which may be due to any running process on the server

if you suspect sql server is the reason , you can monitor the following network counters using performance monitor tool:

• Server: Bytes Received The number of bytes the server received from the network. This counter is the indicator of how busy the server is.
• Server: Bytes Transmitted The number of bytes the server has sent to the network.This counter is of how busy the server is.
• Network Inter: Output Queue Length The length of the output packet queue (in packets).It should not be longer than 2, otherwise delays are being experienced and there is a network bottleneck which should be resolved.

For Server: Bytes Received and Server: Bytes Transmitted I got zero for the values.
For the Network Interface I got the following values:
Monday
20090914 11:25am - 20090914 12:24pm
ObjectCounterInstance AvgMinMax
Network InterfaceOutput Queue LengthBroadcom BCM5708C NetXtreme II GigE [NDIS VBD Client] 0029
Network InterfaceOutput Queue LengthMS TCP Loopback interface 000
Network InterfaceBytes Received/secBroadcom BCM5708C NetXtreme II GigE [NDIS VBD Client] 199666.9459597.5931149878
Network InterfaceBytes Received/secMS TCP Loopback interface 109.91102556.094
Network InterfaceByptes Sent/secBroadcom BCM5708C NetXtreme II GigE [NDIS VBD Client] 411202512813.45698884204
Network InterfaceByptes Sent/secMS TCP Loopback interface 109.91102556.094
Network InterfaceCurrent BandwidthBroadcom BCM5708C NetXtreme II GigE [NDIS VBD Client] 100000000010000000001000000000
Network InterfaceCurrent BandwidthMS TCP Loopback interface 100000001000000010000000
Network InterfaceBytes Total/secBroadcom BCM5708C NetXtreme II GigE [NDIS VBD Client] 431200925036.55899540684
Network InterfaceBytes Total/secMS TCP Loopback interface 219.82205112.188I am not sure what these numbers mean. Does this mean I have a SQL Server issue or does this mean I have an issue with the Network Card? Should I increase the 'network packet size (B)' from 8192 to something higher?

your network is healthy and there is no network bottleneck because:
Output Queue Length for sent/receive =0 (good indicator)

your interface is 1 Gbs, and Bytes Total/sec = received + transmitted = 4312009 byte = 4.3 M (not busy at all)
There is no need to change the default packet 8192K , keep it.

Then does that mean that when the Network Utilization jumps to 97% every 7 minutes that this is normal for this server and that I shouldn't worry about it?

No, we do not have any network monitoring tools or alert (software) installed on this machine. I have noticed that under the Network Adaptor History it is the Bytes Sent (Red) that is spiking. My manager is going to ask the LAN Team to use their tools to follow up on this. He feels that I have gone as far as I can go and that their tools can "sniff" out what is going on.