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might have occurred in a far distant from it. However, network trees provide more flexibility
and scalability. Therefore, other algorithms appropriate for tree networks have been designed.
For the protection of multicast traffic, according to our study, we have found out that if the
complexity is not of our main concern in multicast protection, SSMP is the best technique for
a high number of wavelengths, because it has lower blocking probability. Otherwise, when
the network complexity is important, the OPP_PRL and SLP_ARL techniques are better
choices. Note that if the number of un-overlapped working segments on a primary light-tree is
low, SSPR can be selected when complexity is important.
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