What does "2 Gigabit Ethernet combo + 2 SFP" mean in this context?

[Md. Shahariar Rahaman]

I think that it means 2 ports are support RJ45 and and also SFP. But how can a RJ45 support SFP? 

[Gopinath_Pigili]

Hello Md. Shahariar Rahaman,

Switch offer support for both SFP and RJ45 ports using a single interface. Users can't use both ports simultaneously, however, as only one type will work at a time. These combo ports enable IT teams to choose a connection type that best matches application, network, cost or distance requirements.

You can use Cisco Small Form-Factor Pluggable (SFP) Gigabit Interface Converter  links your switches and routers to the network. 

 Best regards
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[balaji.bandi]

Look at the installation guide :

https://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/350_/2_3/quick_start/guide/en-US/Cisco350-QSG-en-US.pdf

Some of the model have RF45 port and also SFP port for Fibre connection

If only have SFP port then you need to get GLC-T (to convert in to RJ45)

[Md. Shahariar Rahaman]

This concept is not clear yet. What the meaning of "2 Gigabit Ethernet combo"? Are those ports support RJ45 and SFP both? If answer is yes than how a RJ45 port support SFP?

[Md. Shahariar Rahaman · Accepted solution]

2 Gigabit Ethernet combo Ports means RJ45 and SFP both. But if we use one SFP or Ethernet port from those variants, then their corresponding RJ45/SFP port will stop working. If we use both SFP ports, then their corresponding internet ports will stop working. The same cases will happen when using RJ45 ports from combo.