2 x 40 Gigabit Ethernet network module spare
Cisco C3850-NM-2-40G=, 40 Gigabit Ethernet, QSFP+, 9303100 h, 280 g
Cisco C3850-NM-2-40G=. Ethernet interface type: 40 Gigabit Ethernet. Fiber optic connector: QSFP+. Mean time between failures (MTBF): 9303100 h. Weight: 280 g