
Explanation:
vty 0:
+ cisco
+ 0csic
vty 1:
+ no username
+ no password
The command "aaa authentication login default none" means no authentication is required when access to the device via Console/VTY/AUX so if one interface does not specify another login authentication method (via the "login authentication ..." command), it will allow to access without requiring username or password. In this case VTY 1 does not specify another authentication login method so it will use the default method (which is "none" in this case).