For user in local PPP Secrets/PPP Profiles database, it is possible to

For user in local PPP Secrets/PPP Profiles database, it is possible to
A . Allow/deny use of more than one login by this user
B . Allow login by PPPoE and PPTP, but deny login by L2TP
C . Set max values for transferred data (Rx/Tx)
D . Allow only PPPoE login
E . Deny services (like telnet) only for this user or for one group of users

Answer: A,C,D