Exhibit 11 COMPUTER NETWORK TECHNOLOGY CORPORATION Statement Re: Computation of Net Income Per Basic and Diluted Share (in thousands, except per share data) (Unaudited) Weighted Average Shares Per Share Net Income Outstanding Amount ---------- ----------- ------- Three Months Ended March 31, 1999: Basic $2,697 22,481 $ .12 Dilutive effect of employee stock purchase awards and options(1) -- 2,722 (.01) ------ ------ ------- Diluted $2,697 25,203 $ .11 ====== ====== ======= 1998: Basic $ 369 22,106 $ .02 Dilutive effect of employee stock purchase awards and options(1) -- 137 -- ------ ------ ------- Diluted $ 369 22,243 $ .02 ====== ====== ======= (1) For the three months ended March 31, 1999 and 1998, potential dilutive securities primarily consisting of outstanding stock options and shares issuable under the employee stock purchase plan are included in the computation of diluted net income per share using the treasury stock method.