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 June 30, 1999: Basic $1,786 23,062 $.08 Dilutive effect of employee stock purchase awards and options(1) -- 3,164 (.01) ----------- ---------- -------- Diluted $1,786 26,226 $.07 =========== ========== ======== 1998: Basic $ 870 22,107 $.04 Dilutive effect of employee stock purchase awards and options(1) -- 150 -- ----------- ---------- -------- Diluted $ 870 22,257 $.04 =========== ========== ======== Six Months Ended June 30, 1999: Basic $4,483 22,773 $.20 Dilutive effect of employee stock purchase awards and options(1) -- 2,876 (.03) ----------- ---------- -------- Diluted $4,483 25,649 $.17 =========== ========== ======== 1998: Basic $1,239 22,080 $.06 Dilutive effect of employee stock purchase awards and options(1) -- 143 -- ----------- ---------- -------- Diluted $1,239 22,223 $.06 =========== ========== ======== (1) For the second quarter and first half of 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 net income per diluted share using the treasury stock method.