Nokia 4A0-114 Question Answer
Which of the following statements about Route Distinguishers (RD) is FALSE?
An RD is prepended to an IPv4 prefix to form a VPN-IPv4 prefix.
An RD is used to indicate the VPRN service to which a route update is relevant.
A unique RD value is assigned to each VPRN service.
An RD is a 64-bit value.
Route Distinguishers (RDs) are used in BGP/MPLS VPNs to ensure unique VPN-IPv4 prefixes. Here are the characteristics of RDs:
A. True: An RD is prepended to an IPv4 prefix to form a VPN-IPv4 prefix.
B. True: An RD is used to indicate the VPRN service to which a route update is relevant.
C. True: A unique RD value is assigned to each VPRN service.
The false statement is:
D. False: An RD is a 64-bit value. In reality, an RD is a 96-bit value (composed of a 2-byte Type field and a 6-byte Value field).
ReferencesNokia Border Gateway Protocol Fundamentals, Chapter on Route Distinguishers and VPN-IPv4.
TESTED 07 Jul 2025
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