Ciena Corporation Earnings Presentation

Continued strength derived from non-telco revenue Q4 FY 2021 Non-telco revenue 21.1% 33.1% 45.8% *represents 39% of total revenue in Q4 FY 2021 * Copyright © Ciena Corporation 2021. All rights reserved. Proprietary information. Direct Webscale Cable Gov't, R&E, Enterprise 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% -% 12% 5% 22% Non-telco as a % of Total Revenue Direct Webscale Cable Gov't, R&E, & Enterprise Q4 FY 2020 12% 7% 20% Q1 FY 2021 10% 9% 24% Q2 FY 2021 9% 8% 25% Q3 FY 2021 8% 13% 18% Q4 FY 2021 ciena | 15

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