单项选择题 An administrator needs to diagnose problems with a WINS server. Which of the following toolsshould be used?（）

单项选择题 Which of the following authenticates a web server to the remote client in PKI?（）

单项选择题 Several users from the same location are reporting problems accessing the intranet server. An administrator has verified that no other remote areas are having issues connecting to the same server. Which of the following steps should the administrator perform NEXT?（）