There will be the default network name and password of your Linksys Velop that you can use for the first-time setup. But, once you complete the linksys velop mx4200 setup, you must change the default details of the network. Which include the SSID network name and its password which are common as well. To change them, access the advanced and Security Settings from the web interface and choose the network password option. Create a strong password for the network by adding some special characters to it. Also, change the network name to give it a unique identity.