Click the exhibit. Router R6 is a route reflector with clients R1, R2 and R5. Router R3 advertises the prefix 192.168.1.0/27 to routers R1, R2 and R5. How many routes for prefix 192.168.1.0/27 will…

Question

Options

• A1
• B2
• C3
• DNone

• A
  5% (1)
• B
  14% (3)
• C
  76% (16)
• D
  5% (1)

Explanation

Option C is correct because R3 advertises the prefix 192.168.1.0/27 independently to each of R6's three RR clients (R1, R2, and R5), and each client then forwards that route advertisement up to their route reflector, R6 - resulting in 3 separate route advertisements reaching R6.

Why the distractors are wrong:

• A (1): R6 does not receive a single consolidated route; it receives individual advertisements from each client independently - BGP route reflectors don't merge incoming updates.
• B (2): There is no reason for one client to be excluded; all three clients (R1, R2, R5) receive the prefix from R3 and each advertises it to R6.
• D (None): R6 absolutely receives routes - it's the RR and its clients are peering with it specifically to forward their learned routes.

Memory tip: "Clients = copies." Count how many RR clients learned the prefix - that's exactly how many route advertisements the RR receives. Here, 3 clients learned it → R6 receives 3 routes.

No community discussion yet for this question.