Which statement about route targets is true when using VRF-Lite?

Question

Options

• AWhen BGP is configured, route targets are transmitted as BGP standard communities.
• BRoute targets control the import and export of routes into a customer routing table.
• CRoute targets allow customers to be assigned overlapping addresses.
• DRoute targets uniquely identify the customer routing table.

• A
  2% (1)
• B
  91% (52)
• C
  2% (1)
• D
  5% (3)

Explanation

Route Targets in VRF-Lite Explained

Route targets (RTs) function as policy tools that control which routes are imported into and exported from a VRF routing table, making Option B correct. When a route is exported from a VRF, it is tagged with an export RT; when a router receives that route, it checks whether the RT matches any configured import RT for a local VRF, determining whether the route enters that table.

Why the distractors are wrong:

• Option A is incorrect because route targets are transmitted as BGP extended communities (64-bit), not standard communities (32-bit) - this is a common and important distinction.
• Option C is incorrect because it describes the function of VRFs themselves, not route targets; VRFs provide the address-space separation that allows overlapping IP addressing.
• Option D is incorrect because it describes a Route Distinguisher (RD), not a route target - the RD makes routes globally unique within BGP, while RTs handle policy/distribution.

Memory Tip: Think of it this way - the Route Distinguisher = Differentiates (makes routes unique), while Route Targets = Traffic control (controls import/export). The letters D and T help you remember each component's distinct role.

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