Correct Answer: B
PPPoE (Point-to-Point Protocol over Ethernet) does not include encryption by default. It can authenticate users using PAP or CHAP, but the data payload is transmitted in cleartext unless another secure tunneling protocol (e.g., IPSec) is layered on top.
MikroTik supports encryption in other tunneling protocols, such as:
* SSTP (uses SSL)
* L2TP with IPSec
* OpenVPN (SSL-based)
* IPsec itself (for IP layer encryption)
MTCNA Tunneling Chapter - PPP Protocol Features:
"PPPoE offers authentication, compression, but no native encryption. Use IPSec if encryption is needed." Rene Meneses Guide - Tunnel Comparison Table:
"PPPoE is not encrypted. SSTP and L2TP/IPSec are alternatives when encryption is a requirement." Terry Combs Notes - PPP Family Summary:
"PPPoE: Authentication = Yes, Encryption = No. Use with caution over untrusted networks."