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| Question ID 18612 | Which option describes the purpose of the PPP endpoint discriminator?
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| Option A | It identifies the maximum payload packet.
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| Option B | It notifies the peer that it prefers 12-bit sequence numbers.
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| Option C | It identifies the system attached to the link.
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| Option D | It determines whether a loopback is on the link.
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| Correct Answer | C |
Explanation Explanation: In situations in which many clients use the same username to initiate an MP connection, or when interoperating with non-Cisco routers, you need to control the order in which the bundle name is created. It is necessary to configure the access server to create a bundle name based on the endpoint discriminator first, the username second, or both. The endpoint discriminator identifies the system transmitting the packet and advises the network access server (NAS) that the peer on this link could be the same as the peer on another existing link. Because every client has a unique endpoint discriminator, only multiple links from the same client are bundled into a single unique MP connection. For example, consider when two PC clients initiate a multilink connection to an access server using the same username. If the multilink bundle name is established based on the endpoint discriminator first, then on the username or on both, the NAS can accurately bundle the links from each client using the endpoint discriminator as a bundle name. This bundle name is unique to the peer system transmitting the packet. Reference: http://www.cisco.com/c/en/us/support/docs/wan/point-to-point-protocol- ppp/10238-mppp-bundle-name.html