Refer to the exhibit. A network administrator in autonomous system 65100 has set up a dual-homed BGP connection with an ISP. The administrator would like to ensure that all traffic from the ISP enters the autonomous system through the router R1. Which BGP attribute can the administrator configure on routers R1 and R2 to accomplish this?
- next-hop
- weight
- aggregate
- multiple-exit discriminator
- local preference
Explanation: The multiple-exit discriminator (MED) is a nontransitive BGP attribute for best-path determination. MED uses a 32-bit value (0 to 4,294,967,295) called a metric. The purpose of MED is to influence traffic flows inbound from a different AS. A lower MED is preferred over a higher MED.
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