Optical networks have been in commercial deployment since the early
1980s as a result of advances in optical, photonic, and material
technologies. Although the initial deployment was based on silica
?ber with a single wavelength modulated at low data rates, it was
quickly demonstrated that ?ber can deliver much more bandwidth than
any other transmission medium, twisted pair wire, coaxial cable, or
wireless. Since then, the optical network evolved to include more
exciting technologies, gratings, optical ?lters, optical
multiplexers, and optical ampli?ers so that today a single ?ber can
transport an unprecedented aggregate data rate that exceeds Tbps,
and this is not the upper limit yet. Thus, the ?ber optic network
has been the network of choice, and it is expected to remain so for
many generationsto come, for both synchronousand
asynchronouspayloads; voice, data, video, interactive video, games,
music, text, and more. In the last few years, we have also
witnessed an increase in network attacks as a result of store
andforwardcomputer-basednodes. These attackshave
manymaliciousobjectives: harvestsomeone else's data, impersonate
another user, cause denial of service, destroy ?les, and more. As a
result, a new ?eld in communicationis becomingimportant,
communicationnetworksand informationse- rity. In fact, the network
architect and system designer is currently challenged to include
enhanced features such as intruder detection, service restoration
and countermeasures, intruder avoidance, and so on. In all, the
next generation optical network is intelligent and able to detect
and outsmart malicious intruders.
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