Some time we may get Bandwidth exceeded error while accessing a site:
You can view the bandwidth usage of a domain from cPanel. cPanle>>logs>>Bandwidth
When a domain exceeds the allocated bandwidth, we will get bandwidth exceeded error when we access the domain in browser. You can increase the bandwidth of a domain as follows in the cPanel.
1. Login to WHM >> Account Functions >> Modify an Account.
2. Select the domain for which you want to increase the bandwidth and click "modify".
3. In the following page, change the value of the bandwidth in the field "Monthly Bandwidth Limit (MB)".
4. Click Save to save the changes.