050-720 Question #21: Real Exam Question with Answer & Explanation

You work as a Network Administrator for Tech Perfect Inc. The company has a Linux-based network. Users complain that they are unable to access resources on the network. However, there was no such problem the previous day. They are receiving the following error messages regularly: Unable to resolve host name As your primary step for resolving the issue, which of the following services will you verify whether it is running or not?