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