26. A user is able to access internal websites but not able to access external website from his web browser on a corporate network he verifies that he can view the external website on his smart phone which of the following can be a valid cause? A. Access external website is being filtered by a corporate network security device B. computer does not have network connectivity C. computer does not have an IP address assigned to it D. the corporate network does not have an Internet connection E. the external website is down