An optical device for dynamic gain adjusting includes a dynamic gain adjusting filter having one or more semiconductor optical amplifiers. The monomers have the formula p)nArX2 wherein Ar is a trivalent, tetravalent or pentavalent, substituted or unsubstituted, aromatic or heteroaromatic, monocyclic or polycyclic group having from 5 to 50 carbon atoms; X is OH, SH, NR2aR2b, F or Br; p is 0 or 1; n is 1, 2 or 3; R1 is substituted or unsubstituted phenyl and R2a and R2b are independently H, C1-C8 alkyl or C1-C8 perfluoroalkyl. Also, based on the analysis, a list of cloud service providers utilized by the enterprise is revised. A packet loss in the packet group is detected and a position in the packet group where the packet loss occurred is detected.