Are USB Switches Safe?

[jazzguitar1440]

Hi, I recently bought https://www.amazon.com/gp/product/B082K87B87/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

The device connects up to 4 peripherals and can switch between 2 computers. My question is, is this safe? Consider if you have 4 peripherals plugged in, then there would be 4 usb signals coming in on 4 wires, but 4 usb signals coming out on 1 usb wire. This does not sound safe or even possible. How can the one wire distinguish between the 4 inputs? Thank you 

[BiotechBen]

If you look closely, it outputs to two wires for the two PCs.

[jazzguitar1440]

1 minute ago, BiotechBen said:

If you look closely, it outputs to two wires for the two PCs.

Yes, but there are 4 incoming signals and 1 outgoing signal because the switch only transmits the signal on 1 of the 2 output ports.

[BiotechBen]

Are you asking if both PCs can use it at the same time?

The USB controller inside the switch handles the traffic for transmitting back to the pc. This information is travelling insanely fast so interruptions of nanoseconds for different transmittance of signals is imperceptible

[jazzguitar1440]

8 minutes ago, BiotechBen said:

Are you asking if both PCs can use it at the same time?

The USB controller inside the switch handles the traffic for transmitting back to the pc. This information is travelling insanely fast so interruptions of nanoseconds for different transmittance of signals is imperceptible

No I know that only one pc can take the signals at the same time, I am just wondering how 1 pc connected to 1 usb can interpret multiple usb signals. 

 

[AbydosOne]

8 minutes ago, jazzguitar1440 said:

No I know that only one pc can take the signals at the same time, I am just wondering how 1 pc connected to 1 usb can interpret multiple usb signals. 

It's not far off from how network traffic works. Each device sends packets with a device ID/address included, so the host system knows which device sent the packet and can act accordingly, and they get aggregated by the USB hub chip (with the IDs/addresses intact) in the switch. The "switch" just chooses which hosts gets sent the packets.