** Shares of networking equipment maker Ciena CIEN.N rise 8.9% to $240.23 premarket
** Co posts Q4 revenue of $1.35 bln, beating analysts' estimates of $1.29 bln
** Records adj. profit of 91 cents vs. estimates of 77 cents
** Co attributes results to strong demand from cloud and service providers and expanding AI/data-center opportunities
** 13 of 18 analysts rate stock "buy" or higher, five "hold"; median PT is $175 - data compiled by LSEG
** As of last close, CIENA stock up 160% YTD
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))