{HEAD ~ The evaluation} is performed for {TAIL ~ traditional Open Shortest Path First recovery} as well as Multiprotocol Label Switching explicit routing based local recovery and end to end recovery 
is performed for
{ HEAD ~ The evaluation } is performed for { TAIL ~ traditional Open Shortest Path First recovery } as well as Multiprotocol Label Switching explicit routing based local recovery and end to end recovery
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH