MPPE + H-M + S-l-D-C Letter meaning

MPPE + H-M + S-l-D-c what each character mean.

According to section 2nd configuration option format in the rfc3078 file of Microsoft point-to-point encryption (MPPE) protocol:

H: Use stateless mode (this indicates that the sender wishes to negotiate the use of stateless Mode)

M: Use the 56bit key (this indicates the desire of the sender to negotiate the use of 56-bit session keys)

S: Use the 128bit key (this indicates the desire of the sender to negotiate the use of 128-bit session keys)

L: Use a 40bit key (this indicates the desire of the sender to negotiate the use of 40-bit session keys)

D: The 'd' bit is obsolete)

C: For mppc use (the 'C' bit is used by mppc)

Refer:

Https://www.ietf.org/rfc/rfc3078.txt

MPPE + H-M + S-l-D-C Letter meaning