Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Modem only has 1 ethernet output. I have an actiontec M1000 modem and it only has 1 ethernet output.  I need to know if this will allow me to connect my xbox 360 and the modem to the same unit and allow me to connect to XBOX live and use the internet on my computer at the same time. If not what exactly is this thing?
Document: many people use this to connect there computers well if you own an xbox you can use it to link 4 xboxs without the need to connect to the internet with live making you spend 60 bucks instead buy this link. it lost one star for eing very bulky.
Use this in my dorm room to allow multiple connections to run from one internet port, works great on the Xbox 360, PC, and multiple laptops with no latency (slowing).
I mean this thing is small. I'm a network administrator, but I only have one ethernet port in my office, so I needed a switch (or hub) to allow me to add more than one computer to the network in here. This thing sits on my desk and have a really small footprint. It's awesome. It has all the indicator lights I need/want, and it fast, really fast. I have always been a fan of Linksys products, and this one is no different.
I used this switch to simply add internet conncection to my xbox alongside my PC.I live in a college dorm with only one ethernet wall jack for my use, so I bought this switch and it works just fine. Excellent speed and overall perfomance.
Linksys tech support assured me that their were no limitations to this gizmos ability to route ethernet signals. Sure enough, I plugged it in and it's functioning exactly as I hoped. Our internet comes from a cable modem. From that I ran the cat-5 ethernet cable to the Airport Extreem which acts as a wireless router and it also has 1 out port for ethernet, which I connected the EZXS55W switch to.
I bought this product as a gift for my nephew who wanted to run an xbox 360 and a computer in his bedroom. He installed it in a matter of seconds and was on xbox live within a few minutes......works great.
With this device I can connect my pc and xbox 360 at the same time. I was able to purchase this for less than $20 dollars. The speed on gaming is better then with my previous device. All-in-all, one of the better investments I've made!
This switch does exactly what it's designed for, sharing an Ethernet connnection. Don't expect to be able to configure VLANs, multilayer switching, VLAN trunks, load balancing, etc. This does not have any routing, NAT, or firewall capabilities. You would use this switch when you already have a router between your internal network and the Internet, and you need additional Ethernet ports. This gives you a full duplex Ethernet connection at wired speed, and it delivers!
This is a great switch... and for Xbox Live... Very easy to setup just plug your modem into the switch and the rest of your computers and power it on.. and it works.. But I have had some people think that this will imporve your internet speed no it does not it shares your internet speed. but it does help by retransmitting packts and helps performance.
I bought this little switch because my home network has expended a bit recently. I had been using 4 port netgear wireless router to hook up everything and had already ran a wire to the basement of my house for the Xbox 360. When I added another computer in the basement I needed to be able to run an ethernet cable to it but didn't want to run another cable to the basement. I bought this and hooked up the computer and the 360.
Answer: "This thing" is essentially an expansion/junction box: a cable from one port -- such as that from your modem -- into this will result in an increase in the number of ports.  If at present you can connect, as example, only one computer to your modem, you would be able to connect that computer plus additional computers (depending on the number of ports on the switch).