Exam 350-501 topic 1 question 147 discussion

AToM and some Traffic Engineering scenarios are examples of these applications that require a targeted LDP session between non directly connected routers. The command mpls ldp neighbor [vrf vpn-name] ip-addr targeted [ldp | tdp] can be used to manually configure targeted LDP sessions between peers. Answer A

its C https://community.cisco.com/t5/mpls/mpls-te-tunnel-targeted-ldp-session/td-p/2863558

https://www.cisco.com/en/US/docs/ios-xml/ios/mp_ldp/configuration/15-2s/mp-ldp-overview.html " Directly Connected MPLS LDP Sessions If an LSR is one hop from its neighbor, it is directly connected to its neighbor. The LSR sends out LDP link Hello messages as User Datagram Protocol (UDP) packets to all the routers on the subnet (multicast). A neighboring LSR may respond to the link Hello message, allowing the two routers to establish an LDP session. This is called basic discovery. ... Nondirectly Connected MPLS LDP Sessions If the LSR is more than one hop from its neighbor, it is nondirectly connected to its neighbor. For these nondirectly connected neighbors, the LSR sends out a targeted Hello message as a UDP packet, but as a unicast message specifically addressed to that LSR. The nondirectly connected LSR responds to the Hello message and the two routers begin to establish an LDP session. This is called extended discovery. "

Has to be A!

They are mentioning extended discovery, and this is targeted LDP. A is the best answer to this stupid question.

A is correct 100%

A is the best match for me. Anyone agree or disagree? If the LSR is more than one hop from its neighbor, it is nondirectly connected to its neighbor. For these nondirectly connected neighbors, the LSR sends out a targeted Hello message as a UDP packet, but as a unicast message specifically addressed to that LSR. The nondirectly connected LSR responds to the Hello message and the two routers begin to establish an LDP session. This is called EXTENDED DISCOVERY. An MPLS LDP targeted session is a label distribution session between routers that are not directly connected. When you create an MPLS traffic engineering tunnel interface, you need to establish a label distribution session between the tunnel headend and the tailend routers. You establish nondirectly connected MPLS LDP sessions by enabling the transmission of targeted Hello messages. You can use the ****mpls ldp neighbor targeted****command to set up a targeted session when other means of establishing targeted sessions do not apply, such as configuring mpls ip on a traffic engineering (TE)....

C is the best one