A company wants to add an extra layer of security by requiring users to enter a code from their mobile device in addition to their password when logging in. Which of the following should be implemented?

A network administrator wants multiple internal devices to share a single public IP address when accessing the internet. Which of the following technologies should be configured?

A network administrator wants to ensure that unused switch ports cannot be exploited by unauthorized users connecting rogue devices. Which of the following actions should be taken?

A network administrator wants a specific server to always receive the same IP address from the DHCP server based on its MAC address. Which of the following should be configured?

A network administrator is implementing segmentation in a corporate network so that the finance department and the marketing department cannot directly communicate with each other on the same switch. However, both departments still need internet access. Which of the following should the administrator configure to accomplish this?