A network administrator needs to configure DNS so that email sent to a domain is routed to the correct mail server. Which of the following DNS record types should be configured?

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?