PPPoE (Point-to-Point Protocol over Ethernet) does not natively support encryption. It provides authentication using PAP/CHAP and allows IP assignment, but any data transmitted through a PPPoE tunnel is unencrypted unless another encryption mechanism (such as IPSec) is used on top of it.
MikroTik RouterOS supports encrypted tunneling protocols such as SSTP, L2TP/IPSec, or OpenVPN, but not native encryption in PPPoE.
MTCNA Course Manual – PPP Protocols Overview:
“PPPoE supports user authentication and compression but not encryption by itself.”
René Meneses Study Guide – Tunneling Protocols:
“PPPoE is not secure by design. If encryption is needed, use SSTP or L2TP/IPSec.”
Terry Combs Notes – PPP Protocol Capabilities:
“PPPoE does not encrypt data. Only authentication is handled within PPP.”
Answer: BQUESTION NO: 36 [Wireless]
Why is it useful to set a Radio Name on the radio interface?
A. To identify a station in the Access List
B. To identify a station in Neighbor discovery
C. To identify a station in a list of connected clients
Answer: C
Setting a Radio Name in RouterOS provides a unique identifier that is visible to other devices in the wireless environment. It is particularly helpful for identifying connected clients in the registration table on the Access Point.
This name does not affect Access List matching or general Layer 2 communication — it’s used for human readability and monitoring.
A. Access List uses MAC addresses for filtering →❌
B. Neighbor discovery identifies devices based on MAC, IP, and identity →❌
C. Correct → Radio Name shows up in the registration table and helps identify stations✅
MTCNA Wireless Module – Interface Settings:
“The Radio Name is shown in the registration table of access points, making it easier to identify connected clients.”
René Meneses Guide – Wireless Management Tips:
“Use Radio Names to label devices in multi-client setups. It appears under registration when clients connect.”
Terry Combs Notes – Wireless Interface Options:
“Radio Name is not used for access filtering — it’s for display and diagnostics.”
Answer: CQUESTION NO: 37 [DHCP]
A DHCP server is configured on a LAN interface which is a port on a bridge. The DHCP server does not start. What could be the reason(s)?
A. The DHCP server cannot run on an interface which is also a bridge port
B. There might not be an IP address assigned to the LAN Interface
C. The IP address pool could be incorrectly defined
D. There may be multiple IP addresses set on the LAN interface
Answer: B, C
For a DHCP server to operate properly, the following conditions must be met:
The DHCP server must be attached to the correct interface (typically the bridge, not individual ports).
The bridge interface must have a valid IP address.
The IP address pool must be defined correctly (matching subnet, avoiding conflicts).
Let’s evaluate:
A.❌Incorrect. DHCP can run on a bridge or an interface on a bridge. It is recommended to attach DHCP to the bridge, not individual ports.
B.✅Correct. If there is no IP address on the interface (bridge), DHCP won’t start.
C.✅Correct. If the address pool is misconfigured (e.g., outside the subnet or overlapping with the router’s IP), DHCP won’t function.
D.❌Not a valid blocker. Multiple IPs can exist on the interface; DHCP still works if one is valid.
MTCNA DHCP Module – Configuration Troubleshooting:
“Make sure that the interface (bridge) where the DHCP server is assigned has a valid IP and a properly defined pool.”
René Meneses Guide – DHCP Server Setup:
“DHCP will not function if no IP is assigned to the interface. Check the pool range and binding address.”
Terry Combs Notes – DHCP Tips:
“Assign the DHCP server to the bridge, not individual ports. Missing IP or incorrect pool = DHCP won’t start.”
Answer: B, CQUESTION NO: 38 [PPP]
There can be more than one PPPoE server in a single broadcast domain:
A. True
B. False
Answer: A
Yes, it is possible — and fully supported — to run multiple PPPoE servers in the same Layer 2 broadcast domain. Clients will receive Offer packets (PADO) from all PPPoE servers, and can choose which one to connect to based on configuration or server name (service name).
This is commonly used in ISP networks to provide redundancy or offer different service types.
MTCNA Course Manual – PPPoE Deployment:
“Multiple PPPoE servers may exist in the same Layer 2 domain. Clients choose based on response or service name.”
René Meneses Study Guide – PPPoE Operations:
“PPPoE discovery protocol supports multi-server environments. Clients may be configured to select a preferred one.”
Terry Combs Notes – PPPoE Server Design:
“Several PPPoE servers can coexist. Just avoid assigning overlapping IP pools.”
