Free Practice Questions for MikroTik MTCNA Exam

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.”

/27 subnet = 255.255.255.224 → block size of 32

To determine the subnet range:

Start by finding block base:15.242.55.62 falls in the 15.242.55.32/27 subnetRange: 15.242.55.32 – 15.242.55.63Network Address = 15.242.55.32Broadcast Address = 15.242.55.63Usable Host Range = 15.242.55.33 to 15.242.55.62

Evaluation:

A. 15.242.55.33 – 15.242.55.62 →✅Valid host range

B. 15.242.55.32 – 15.242.55.63 →❌Includes network and broadcast addresses

C. 15.242.55.31 – 15.242.55.62 →❌15.242.55.31 is outside this subnet

D. 15.242.55.33 – 15.242.55.63 →❌Includes broadcast address

MTCNA Course Slides – Subnetting:

“In a /27 subnet (block size 32), the first address is the network, last is broadcast. Only the IPs in between are valid host addresses.”

René Meneses Guide – Subnetting Examples:

“A /27 includes 32 addresses. For subnet 192.168.1.32/27, usable IPs are 192.168.1.33–62.”

Terry Combs Notes – Addressing Exercises:

“Subtract 2 from total IPs in subnet for host count. Don't use .0 (network) or .255 (broadcast) equivalents.”

Answer: A 

The “Max Limit” value in MikroTik Simple Queues defines the maximum allowed bandwidth. In this case:

Target Address: 192.168.1.10

Target Upload = 1M → The host can upload at a maximum of 1 Mbps

Target Download = unlimited → No restriction on download

This does not “guarantee” bandwidth — it enforces a ceiling. A guaranteed rate would require "Limit-at" to be set.

Evaluation:

A.❌This queue limits, it does not guarantee a minimum bandwidth.

B.❌Download is set to unlimited — no limitation.

C.✅Upload is limited to 1 Mbps — correct.

D.❌Download rate is unlimited — no guarantee or limit.

MTCNA Course Manual – Simple Queue Explanation:

“Max-limit sets the maximum throughput for upload/download. It’s a ceiling, not a guarantee.”

René Meneses Guide – Simple Queues Explained:

“In this case, upload is capped at 1M. No burst or download limit is applied.”

Terry Combs Notes – Queue Properties:

“Always distinguish between 'limit-at' (minimum guarantee) and 'max-limit' (maximum cap).”

Mangle rules that mark routing (using the routing-mark property) can only be applied in the following chains:

prerouting: For traffic arriving at the router

output: For traffic generated by the router itself

Other chains like forward, input, postrouting do not support routing-mark.

A.✔Correct – prerouting and output are used for routing-mark

B.✘forward does not support routing-mark

C.✘forward is invalid for routing-mark

D.✘input does not support routing decisions

E.✘postrouting is used for NAT, not routing

Extract from MTCNA Course Material – Mangle and Routing Marks:

“Routing-mark is applied only in prerouting (for transit traffic) and output (for router-generated traffic).”

Extract from MikroTik Wiki – Mangle:

“routing-mark can be used only in prerouting and output chains.”

Extract from René Meneses Study Guide – Mangle and PBR:

“To perform policy-based routing, use prerouting or output to assign routing-marks.”

===========

A /20 subnet means 32 - 20 = 12 bits are available for host addresses.

Total IPs: 2¹² = 4096

Usable IPs = 4096 - 2 = 4094 (excluding network and broadcast addresses)

Therefore, 4094 usable IP addresses exist in a /20 subnet.

Option breakdown:

A. 2047 → Incorrect, would apply to a /21 subnet (2048 total - 1)

B. 4096 → Incorrect, total IPs, not usable

C. 2048 → Incorrect

D. 2046 → Incorrect

E. 4094 →✔Correct

Extract from MTCNA Course Material – IP Addressing/Subnetting Section:

"Number of usable hosts = 2^host-bits - 2 (network and broadcast). For /20, 2^12 - 2 = 4094."

Extract from Terry Combs Notes – IP Subnet Calculations:

“A /20 gives 4096 IPs total, 4094 usable.”

===========

Bridging loops occur when there are multiple active paths between switches or bridge interfaces, causing broadcast storms or MAC table instability. MikroTik RouterOS supports both STP (Spanning Tree Protocol) and RSTP (Rapid Spanning Tree Protocol) to detect and block redundant paths.

A.✔RSTP – Faster and preferred protocol to prevent loops.

B.✔STP – The original protocol, slower convergence but still effective.

C.✘Connection tracking – Not related to Layer 2 loop prevention.

D.✘UDP filter – Filters specific traffic types, doesn’t handle loops.

E.✘ICMP filter – Not relevant to Layer 2 loop protection.

Extract from Official MTCNA Course Material – Bridging and STP:

“STP or RSTP must be enabled to prevent bridging loops. RSTP is the recommended version due to faster convergence.”

Extract from René Meneses MTCNA Study Guide – Bridging:

“Always enable STP or RSTP when using bridges with multiple paths to prevent Layer 2 loops.”

Extract from MikroTik Wiki – STP / RSTP:

“STP and RSTP are loop prevention mechanisms for bridges. They dynamically block redundant links.”

===========

When you place multiple interfaces (ethernet, wlan) into a bridge, the bridge interface becomes the logical Layer 3 interface. Any IP-related services (e.g., DHCP server, firewall rules) must be applied to the bridge interface, not the individual ports.

A.✘Incorrect – IP services are not bound to physical ports in a bridged setup.

B.✘Incorrect – DHCP works perfectly in this setup.

C.✘Incorrect – The bridge ports are Layer 2; DHCP must bind to the Layer 3 bridge interface.

D.✔Correct – Configure the DHCP server on the bridge interface.

Extract from Official MTCNA Course Material – Bridging and DHCP:

“When using a bridge interface with multiple ports, IP services (like DHCP) must be bound to the bridge itself.”

Extract from René Meneses MTCNA Study Guide – Bridging Concepts:

“DHCP server should be created on the bridge interface if it includes both wireless and ethernet clients.”

Extract from MikroTik Wiki – DHCP Server:

“Always assign the DHCP server to the bridge interface when clients are behind bridged ports.”

===========

In MikroTik’s firewall, the correct chain depends on the traffic direction and whether the traffic is destined for or originating from the router itself.

To block access to MSN (or any other service being accessed by a user from the LAN to the Internet), you must filter transit traffic. This is done in the forward chain.

A. input → Used for traffic destined to the router (e.g., WinBox, SSH).

B.✘process → Invalid option (does not exist in RouterOS).

C.✔forward → Used for user traffic passing through the router (e.g., LAN client to MSN servers on the Internet).

D. output → Used for traffic originating from the router itself (e.g., ping from router to external IP).

Extract from Official MTCNA Course Material – Firewall Chains:

“Use the forward chain to filter traffic passing through the router (LAN to WAN). Blocking access to external services like Facebook or MSN belongs here.”

Extract from René Meneses MTCNA Study Guide – Firewall Chains:

“To block Internet services for users, configure rules in the forward chain. Input is only for traffic targeting the router.”

Extract from MikroTik Wiki – Firewall Overview:

“forward: filters all traffic going through the router. For user access restrictions, place rules here.”

MikroTik's Hotspot feature intercepts all HTTP requests and redirects them to a login page. However, there are use cases where unauthenticated users need access to certain websites (e.g., public resources or captive portal exceptions). In such cases, MikroTik uses the "Walled Garden" feature.

There are two types of Walled Garden:

C. ip hotspot walled-garden: used for allowing access to domain names or web addresses (e.g.,www.example.com )

D. ip hotspot walled-garden ip: used for allowing access to specific IP addresses, bypassing authentication

A. ip-binding → Incorrect. This allows bypass or blocking based on IP/MAC of the user, not websites

B. profile → Incorrect. This is used for setting Hotspot server configurations

C.✔Correct–used for domain-based exemptions

D.✔Correct–used for IP-based exemptions

Extract from Official MTCNA Course Material – Hotspot Section:

"Walled-Garden allows specific websites or IP addresses to be accessible without login. This is useful for allowing access to a captive portal or other resources."

Extract from René Meneses MTCNA Study Guide – Hotspot Chapter:

“Use the walled-garden or walled-garden ip menus to permit pre-login access to public or portal URLs.”

Extract from Terry Combs Notes – Hotspot Walled Garden:

“Walled-garden (by domain) and walled-garden IP (by destination IP) let clients bypass the login page for specific services.”

===========

The action=masquerade is used exclusively in the srcnat chain. It dynamically hides internal IP addresses behind the router's public IP. It cannot be used in the dstnat chain.

A.✘Incorrect – masquerade is not allowed in dstnat regardless of parameters.

B.✘Incorrect – masquerade is not valid in the dstnat chain.

C.✘Incorrect – masquerade does not operate in dstnat, direction does not change this.

D.✔Correct – masquerade must only be used in chain=srcnat.

Extract from MTCNA Course Material – NAT Concepts:

“Masquerade is a special type of source NAT used only in the srcnat chain. It is invalid in dstnat.”

Extract from René Meneses Study Guide – NAT Actions:

“Use action=masquerade in chain=srcnat. RouterOS will not accept it in dstnat.”

Extract from MikroTik Wiki – NAT Rules:

“action=masquerade is not allowed in dstnat chain and will result in error if applied.”

===========