Which of the following statements regarding LSPs are true? (Choose two)
IGP-based LSPs are established solely from information contained in routing tables.
The constraint-based routed LSP is calculated at the ingress of the network, based on the router database and user defined constraints.
The constraint-based routed LSP is calculated at each hop of the LSP, based on the route table and user defined constraints.
IGP-based LSPs must use LDP signaling.
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