Click on the exhibit.
Why might router R2 have a Link LDP session to R1 (10.10.10.1:0) but not to R3 (10.10.10.3:0)?
LDP is not configured on R2.
R2 does not have a route to 10.10.10.3.
LDP is not configured on R3's interface to R2.
The targeted session is not configured on R2.
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