Explain why a network administrator needs to monitor the system?

What is active directory? What is DNS? What is relationship between Active Directory and DNS

When Judy logged on the network, she faced the message to request to change her password. So, she changed her password. But, she does not like to remember too many passwords. She wants to keep only one password. So, she tried to change the password again to her original password. But, she cannot change the password. Why cant she change the password?

After setting up IP address and installing Active Directory at the server, you restarted the server. But, you found out that the Preferred DNS Server is changed to 127.0.0.1 that is different from your setting. What does 127.0.0.1 indicate? How to solve this issue?

Scott can log in the server from a client. But, anyone else cannot log in the server from a client. Even the network administrator cannot get access to the server from a client. However, the network administrator can log in server at the server computer. Why does this thing happen? How to solve the issue?

New York domain is a trusted domain, while Minneapolis domain is a trusting domain. The network administrator plans to have the following groups in New York domain and Minneapolis domain. Which are the groups that the administrator cannot make? Why?

New York Domain

Finance Group Domain Local Group

IT Group Global Group

VP-NY Group Universal Group

Minneapolis Domain

Sales Group Domain local Group

Accounting Group Global group

VP-MSP Group Universal Group

You are the server administrator in the IT Department of a community college. The head of the Psychology Department has just resigned. His user account has access to many databases and spreadsheets related to the department's budget. What is the easiest way to create an account for his replacement who is newly hired from outside?