单选题 Bob is a new security administrator at a financial institution. The organization has experienced some suspicious activity on one of the critical servers that contain customer data. When reviewing how the systems are administered, he uncovers some concerning issues pertaining to remote administration. Which of the following should not be put into place to reduce these concerns?i. Commands and data should not be sent in cleartext.ii. SSH should be used, not Telnet.iii. Truly critical systems should be administered locally instead of remotely.iv. Only a small number of administrators should be able to carry out remote functionality.v. Strong authentication should be in place for any administration activities.