Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 265

What attribute is used to influce traffic form AS200 and AS300 so that it uses link1 to reach AS100?

Answer options

• A. MED
• B. AS_path
• C. Weight
• D. Local preference

Correct answer: A

Explanation

The Multi-Exit Discriminator (MED) attribute is specifically designed to influence the routing decisions of external Autonomous Systems (AS). In this case, using MED allows AS200 and AS300 to prefer link1 to reach AS100. The other options, AS_path, Weight, and Local preference, do not serve the same purpose in influencing external traffic routing in the way that MED does.