What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub-in a hub-and-spoke topology?

Question

Exhibit

Options

• AIt avoids split-horizon issues with distance vector routing protocols.
• BIP addresses can be conserved if VLSM is not being used for subnetting.
• CA multipoint interface offers greater security compared to point-to-point subinterface configurations.
• DThe multiple IP network addresses required for a multipoint interface provide greater addressing flexibility over point-to-point configurations.
• EA multipoint interface offers better performance.

• A
  3% (1)
• B
  74% (23)
• C
  13% (4)
• D
  3% (1)
• E
  6% (2)

Explanation

In a hub-and-spoke Frame Relay topology, a multipoint interface places all spoke connections within a single subnet, requiring only one block of IP addresses for the entire hub interface. Point-to-point subinterfaces, by contrast, require a separate subnet for each spoke connection (each subinterface is its own point-to-point link), consuming significantly more IP address space - especially costly when not using VLSM. This address conservation is the key advantage of multipoint. Note that multipoint interfaces actually create a split-horizon problem for distance vector protocols (making option A a disadvantage, not advantage), and they offer no inherent security or performance benefits over point-to-point subinterfaces.

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