Which of the following features might be used by the Enterprise Campus network designer as a means of route filtering?

Question

Options

• AIPv4 static routes
• BRoute tagging using a route map in an ACL
• CTagging routes using the BGP MED
• DEIGRP stub networks

• A
  7% (3)
• B
  14% (6)
• C
  5% (2)
• D
  75% (33)

Explanation

Answer D is correct. EIGRP stub is a route filtering mechanism that prevents a stub (spoke) router from advertising transit routes or summary routes it should not propagate. This is widely used in hub-and-spoke Enterprise Campus designs to control which routes are redistributed and advertised, effectively filtering the routing table at the spoke. Option A (static routes) is a routing tool, not a filtering tool. Option B describes route tagging, which is a marking mechanism used in conjunction with route maps, but the description combining it with an ACL for tagging is inaccurate as described. Option C (BGP MED) is a path-selection metric used between BGP peers, not a route filtering tool in the Campus context.

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