Author Archives: Serenity Huang

Besides the Chip, What Else Composes an Ethernet Switch?

“The chip is the heart of a switch.” This is already known to us. But a chip cannot work alone to allow the operation of a switch. Other familiar parts include the noisy fans that often reminds us the switches … Continue reading

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How to Understand Link Budget and Link Loss in Fiber Optic Network?

If you’re a network engineer once involved in a cable plant installation project, you must have heard the term Link Budget. People in this area know how important it is to a fiber optic network cabling. During the design stage … Continue reading

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400G CFP8 FR8 and LR8 Transceivers with PAM4 Technology

400G Ethernet technology is demonstrated at the Optical Networking and Communication Conference & Exhibition (OFC) 2017, and new module types like 400G CFP8 FR8 and LR8 with pulse amplitude modulation (PAM4) technology are announced. Why 400G now? While we’re still … Continue reading

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RJ45 vs SFP: Which Should I Use to Connect Two Switches?

When switches have both SFP port and Ethernet port for 1000Mbps connections, it is always the case for us to decide whether to use SFP fiber optic module or RJ45 Ethernet cable solution. Although it really depends on many factors, … Continue reading

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10G Stacking Over Cat6a or DAC

We have got benefits from the stacking of 10G SFP+ switches for the past decades, and the 10G SFP+ direct attach cable (DAC) makes the stacking low-cost. But when 10GBASE-T becomes a new port choice on 10G switches, stacking on … Continue reading

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