This exam is retired and not valid now. The exam number is 642-311 Optical SONET and the exam name is Cisco Optical Specialist. This exam was available in English and presented 75-85 questions. This exam was discontinued on 15th February 2007. No replacement was available for this exam. This exam was related to the Cisco certification. Because the exam is retired, no other information is available now.
Cisco 642-311 exam course
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