Help me with a little fast question.

Hello everyone, :)
I have one ethernet output port in my room, I want to connect from my Computer as well as my Laptop on the same time.
Which I mean.. I want to know if there is an adapter for making the output from one port to two ports or more.. is there?
what do they call it?

------- ---------
one ------- two
port ------- outputs
------- ---------

Buy a switch. It's cheaper. A router will not work if it's in the same range as whatever is giving you your IP address, unless you turn off NAT in the router or change it to a different range.fib112

u just need to disable DHCP. DHCP is what gives out IP addresses