SFPs + Fiber = cost more than switch?
Proposed specs - official IEEE release expected in December
400 Gbit/s Ethernet
at least 100 m over multi-mode fiber (400GBASE-SR16) using sixteen parallel strands of fiber each at 25 Gbit/s[19][20]
at least 500 m over single-mode fiber (400GBASE-DR4) using four parallel strands of fiber each at 100 Gbit/s[21][22]
at least 2 km over single-mode fiber (400GBASE-FR8) using eight parallel wavelengths (CWDM) each at 50 Gbit/s[21][23][24]
at least 10 km over single-mode fiber (400GBASE-LR8) using eight parallel wavelengths (CWDM) each at 50 Gbit/s[21][24][25]
200 Gbit/s Ethernet
at least 500m over single-mode fiber (200GBASE-DR4) using four parallel strands of fiber each at 50 Gbit/s[26][27]
at least 2 km over single-mode fiber (200GBASE-FR4) using four parallel wavelengths (CWDM) each at 50 Gbit/s[1][27]
at least 10 km over single-mode fiber (200GBASE-LR4) using four parallel wavelengths (CWDM) each at 50 Gbit/s[1][27]
