Which of the following must be added to a vlan with a gateway in order to add security to it?

A SSH configuration with password and username and a IP address and subnet mask to the Vlan.

Explanation:

Vlan also called virtual lan or switch virtual interface, is used to assign an IP address, subnet mask and a default gateway address, to make configuration of switches and routers remote through SSH or telnet.

By default, the Vlan comprises of all the ports in an intermediate device like routers and switches.

The SSH configuration is a low encrypted channel of port number 22, with required username and password.

answer; certification; plz check first, i believe this is correct. good luck;