Question 1

The following description of MED, correct:

Options :

A : MED default value is 100

B : MED can only be passed within this AS

C : MED is an optional non-transitional attribute

D : MED The default value is 0

Answer: C,D

Question 2

Regular expressions can be used for Community-filter and AS-path-filter definition attribute types for route filtering.

Options :

A : True

B : False

Answer: A

Question 3

Router HW1 exists in the carrier HW's network as an MPLSLSR router. The router receives a packet carrying a label, but the label entry does not exist in its LFIB. So how does the router handle that message?

Options :

A : Router HW1 strips off the label and looks for the FIB using the P destination address

B : Router HW1 uses LDP to create an LSP and creates a new path in LFIB for the label carried in the message

C : Router HW1 drops the message

D : Router HW1 will forward the message with the default label

Answer: C

Question 4

Regarding the Stub region and the Totally Stub region of the OSPF protocol, the following statement is correct

(multiple choice)

Options :

A :

After modifying the original Stub area to a Totally Stub area, the number of LSAs in the LSDB of each

router in the region will definitely be reduced

B :

ASBR cannot be present in either the Stub zone or the Totally Stub zone

C :

When you modify the original Stub area to a Totally Stub region, the number of LSAs propagating

within the region will definitely decrease

D :

If there are two ABR in the Totally Stub zone, each ABR sends an LS ID of 0000 to the router in the

zone LSA

Answer: B,D

Question 5

If you run PIM-SM in a multicast network, you need to build a multicast forwarding tree between the multicast

source and the receiver to enable the receiver to receive the multicast effect, so what are the following options

for the correct tree sketch for the build?

Options :

A :

What is built between the multicast source and the RP is the SPT tree

B : RP and the receiver is built between the RPT tree

C : Built between the RPT tree

D : RP and the swap is the SPT tree

Answer: A,B

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