Ciena Corp (NYSE:CIEN) reported better-than-expected fourth-quarter results and issued upbeat first-quarter sales guidance on Thursday.The company reported a quarterly revenue growth of 20.3% year-on-year to $1.35 billion, beating the analyst consensus estimate of$1.29 billion. The American telecom networking equipment and software services supplier reported adjusted EPS of 91 cents, beating the analyst consensus estimate of 77 cents.Ciena expects first-quarter revenue of $1.350 billion-$1.430 billion (com ...