400G breakout explained: 4x100G, 2x200G and when to use it
A 400G switch port is expensive, and most of the servers and leaf switches you want to connect to it do not run at 400G. Breakout is how you stop wasting the difference: one 400G port becomes four 100G links, or two 200G links, and suddenly the port density on that line card makes financial […]
JNP-QSFP-100G-LR4: the full specification, and the other part numbers for the same optic
JNP-QSFP-100G-LR4 is a 100GBASE-LR4 QSFP28 transceiver: four wavelengths, one duplex single-mode pair, 10 kilometres. That part is straightforward. What is not straightforward is that Juniper has published four names that resolve to the same physical module, and three more that look almost identical and are genuinely different parts. People order across those boundaries constantly, and […]
100G ZR4 vs LR4 vs ER4: Which One Is Right for You?
When you are selecting 100G optics for a network upgrade, expansion, or replacement project, the decision often comes down to three common long-reach options: LR4, ER4, and ZR4. Each is built for a different distance, a different type of network architecture, and a different commercial objective. At a glance, the comparison looks simple: Those distance […]
