While MPLS facilitates any to any communication across sites of organizations (Multipoint communication) , leased line is a dedicated and high speed connectivity built across two sites(Point to Point communication). Leased lines do not share the connectivity with any other customer and we get symmetric speed in both directions.
Leased lines is an older technology than MPLS and has been around a bit longer.
Below link enumerates details comparison between both the terms -
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
Introduction Basic configuration for netflow Scale parameters for
netflow Netflow support Architecture Packet flow for netflow Inside the
LC CPU Netflow Cache size, maintenance and memory Sample usage Cache
Size Aging Permanent cache Characteristics Which...