Question 1

Which of the following statements best describes downstream unsolicited label distribution?

Options :

A : An LER may answer requests for label mappings immediately, without waiting for a label mapping from the next-hop

B : An LER may advertise label mappings to all peers for which it might be a next-hop for a given FEC

C : An LER propagates a label mapping downstream for a FEC. only if it has a label mapping for the FEC next-hop

D : An LER will only distribute a label for a FEC when it has been requested to do so

Answer: B

Question 2

Which of the following LDP message categories is UDP-based?

Options :

A : Notification

B : Session

C : Discovery

D : Advertisement

Answer: C

Question 3

Which of the following devices inspects the MPLS header in the received packet, and exchanges it for a new MPLS header?

Options :

A : iLER

B : LER

C : LSR

D : PE

Answer: C

Question 4

Which of the following regarding the location of an MPLS label is FALSE?

Options :

A : The MPLS label value may be carried in an ATM header

B : The MPLS label value may be carried in a shim header

C : The MPLS label value may be carried in an OSPF header

D : The MPLS label value may be carried in a Frame Relay header

Answer: C

Question 5

Which of the following about the BGP VPN-IPv4 address family is FALSE?

Options :

A : When a PE router receives an IPv4 prefix from its local CE, it creates a VPN-IPv4 prefix

B : VPN-IPv4 allows BGP to distinguish between duplicate prefixes originating from different customers.

C : In a VPRN, data traffic is carried in packets that have VPN-IPv4 addresses

D : VPN-IPv4 addresses are only present within the service provider network.

Answer: C