MTCRE

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2020-09-25  ==  Course : MTCRE-EN

 

Name E-mail

1. The OSPF routers that see all their neighbours in "Full" state are:

Select all correct answers.

Failover DR

BDR

DR

Main Router

BBDR

2. Which value should be used in an interface's "Priority" field to prevent it from participating in the DR/BDR election?

1

100

10

It's impossible to prevent a router from participating in that election

0

3. MikroTik's version de OSPF is compatible only to RFC2328 (IPv4). It does not support IPv6.

False

True

4. To calculate the path's cost as a packet travels through a router, we use ...

the router's outbound interface's OSPF priority

the router's outbound interface's cost

the router's inbound interface's OSPF priority

the router's inbound interface's cost

5. What does this image represent?

The flow of a packet inside a router

FIB

RIB

The steps taken to configure many routing protocols on a single router

The routing tables and the processing of routing information

6. Which two area types can only have one entry/exit point?

Stub

Totally stubby

Regular

Not So Stubby area (NSSA)

7. The technic of creating VLANs in VLANs respect the ... standard.

802.1X

802.1Q

802.1ad

802.11ad

8. You create an EoIP tunnel between two routers. Although your configurations (local and remote IP addresses, tunnel ID) are good, the tunnel is not coming up. What other configuration item should you look at?

Lets assume that the network is functions properly and is not the cause of the issue.

No IPSec password must be present as this option is not supported on RouterOS

MAC addresses of the peers. They must be different to avoid conflitcs

The name of the interface must be the same on both sides for the tunnel to come up

MAC addresses of the peers. They must be identical since the tunnel is an extention of a layer 2 network between two routers

9. Creating VLANs via the "Switch chip"...

Choose all applicable answers.

Permits "Wire speed" packet transfers between two computers on the same VLAN

Can be done on all MikroTik router models, including CCRs

Is the software approach used to simplify VLAN creation

Does not overload the CPU

10. What is the ECMP technic?

A technic by which we can specify many gateways is a single route

A technic by which each route is tested (for outages) before being used

A technic by which we assign many destinations to one gateway in a single route

A technic by which we can load balance between many gateways in a single route

11. The correct syntax to activate an OSPF interface in area 51 is:

/routing ospf network add areas=51 network=192.168.88.0/24

/routing ospf network add area=51 network=192.168.88.0/24

/routing ospf network add area=51 network=192.168.88.0

/routing ospf network add network=192.168.88.0/24

12. Which are, in order, the values of Hello intervals and Dead intervals in a broadcast capable OSPF network?

10 and 40 seconds

30 and 120 seconds

40 and 10 seconds

10 and 20 seconds

13. LSA #1 announces :

A list of directly connected links on the router

A list of routes to the ASBR

A list of DR routers linked to the subnet

This LSA is not supported

14. LSAs are sent to all routers ...

of the same area

of the same AS (Autonomous system)

only if the "Router-ID" option is at it's default value

of the same IP subnet

15. What's found in the RIB?

Routes that are active and used in the routing decision process

Routes learned from other protocols

Static routes

LSAs of neighbouring BGP routers

Directly connected routes

OSPF's DR and BDR routers

16. In an OSPF network, DR stands for:

Designated Routing

Distribution Router

Designated Router

Dijkstra's Routing

17. EoIP is a technology that...

Choose all applicable answers.

Is proprietary to MikroTik

Uses protocol # 89

Allows to extend a layer 2 (broadcast domain) accross a layer 3 network

Does not work accross routers

Uses protocol # 47

18. On a MikroTik "RB" style router, what's the limitation of using "Hardware offloading"?

Only one VLAN per switch chip can be accelerated

This technic works with only two Ethernet ports

There are no limitations. This is why the "Master-Slave" setup was replaced by "Hardware offloading" configurations

With weaker CPUs, it's not possible to transfer data at "Wire speed" between two devices on the same VLAN

19. OSPF route redistribution is done using two types of metrics. Which are they?

type-B

type-1

type-A

type-2

no

20. A router connected to two areas is called:

Internal

Area Border Router (ABR)

Backbone router

ASBR

21. Managing VLAN traffic when done using a software configuration ...

Is done by a module that can be bought separately, which totally offloads the CPU

Is done through the "Switch chip", which totally offloads the CPU

Is done by the CPU and uses it a lot depending on traffic load

Is done by the CPU which is unaffected by network traffic load

22. In an OSPF nerwork, all routers form adjacency links between each other. True or false?

False

True

23. It's possible to specify an interface rather than an IP address as a gateway.

True

False

24. The "Network" tab, found under Routing - OSPF, is used to:

Select the most precise answer.

Define the IP subnets that will be advertised while not receiving OSPF trafic on their associated interfaces

Define the IP subnets that will be advertised

Define the interface that will use OSPF

Define the IP subnets that must listen to receive LSA's from other routers

25. Besides peer IP addresses, the creation of IPIP tunnels requires that both peers use the same Tunnel-ID to setup the tunnel.

False. An identical "Keep-alive" value is required on both sides

False. Only the IP addresses are required

True. Without this number, the tunnel can never come up

True, but an IPSec password IPSec is also required for the tunnel to come up

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End of the "MTCRE-EN" exam

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