An administrator wants to create an address book that all company employees can access. The employees must be able to update the address book, and have immediate access to such changes, without…

An administrator wants to create an address book that all company employees can access. The employees must be able to update the address book, and have immediate access to such changes, without having to download and import a new file into their e-mail program. Which of the following types of servers must the administrator install and configure?