Question 26 of 2,011
mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show mpls ldp neighbor
Peer LDP Ident: 192.168.2.2:0, Local LDP Ident: 192.168.1.1:0 TCP connection: 10.1.1.2.646 - 10.1.1.1.646 State: Oper; Msgs sent/rcvd: 100/100; Downstream Up time: 00:45:00 LDP discovery sources: GigabitEthernet0/0, Src IP addr: 10.1.1.2 Addresses bound to peer LDP Ident:
10.1.1.2 192.168.2.2
Based on this output, what is the state of the LDP session?
⚠ Common exam trap
Cisco often tests the distinction between LDP discovery (UDP) and session establishment (TCP), and the trap here is that candidates may confuse the 'Oper' state with an initialization state or incorrectly assume UDP is used for the entire LDP process.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The LDP session is operational and exchanging label information.
The output shows 'State: Oper', which indicates the LDP session is operational. The 'Downstream' label distribution mode and the fact that messages have been sent and received (100/100) confirm that the session is actively exchanging label information. This matches the correct answer that the LDP session is operational and exchanging label information.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The LDP session is operational and exchanging label information.
Why this is correct
The 'State: Oper' indicates the session is operational, and the message counts confirm label exchange.
- ✗
The LDP session is in a down state due to a TCP reset.
Why it's wrong here
The state is 'Oper', not down.
- ✗
The LDP session is in initialization state because no labels have been exchanged.
Why it's wrong here
The session is operational, so labels have been exchanged.
- ✗
The LDP session is using UDP instead of TCP.
Why it's wrong here
LDP uses TCP for session establishment, as shown by the TCP connection.
Visual reference
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Last reviewed: Jun 24, 2026
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