Which two statements correctly describe LSRs? (Choose two.)
- An edge LSR is a device that inserts or removes labels on packets and that forwards packets according to labels.
- An LSR is a device that primarily labels packets or removes labels.
- An LSR is a device that forwards packets, according to labels.
- An end LSR is a device that primarily inserts labels on packets or removes labels.
- MPLS does not require LSRs.
Explanation: An LSR (Label Switch Router) is defined as a router that supports MPLS, understands labels, and forwards packets based on them. An Edge LSR sits at the boundary of the MPLS domain and is specifically responsible for imposing (inserting) labels on incoming unlabeled packets or disposition (removing) labels from packets leaving the domain.
Related exam: Checkpoint Exam: MPLS and VPN Technologies
