Reddit mentions of Unitek USB 2.0 to RJ45 LAN Wired Gigabit Ethernet Network Adapter and Supported 10/100 Mbps Ethernet for MacBook Air, MacBook Pro, Surface Pro (Black)

Easiest thing?

• Invest in a newer, more powerful router.
  
  Second easiest?
  
  
• See if any alternate firmwares (Tomato, OpenWRT, DD-WRT, etc) are able to be installed to your router. It may not be as good as buying a new $300 router, but it'll be a lot better than how your router came out of the box.
  
  Toughest?
  
  
• If you have any old computers lying around (Assuming they're from the past 10 years), make sure it has 2 Gigabit Ethernet ports, and get it set up as a physical firewall (with PFSense or the likes).
  
  
  
  DDoS is a compound problem. First, the packets being sent to you can saturate your internet connection. The bigger issue with most consumer routers is the fact that they generally try to protect against this thing by default, but are underpowered for the task.
  
  Consumer routers try to do as much as they can, and they have quite the workload.
  
  
  
  I'm going to use an analogy here with physical snail mail since no one is too interested in jargon.
  
  You are you, and you're looking forward to sending and receiving letters to/from your friends. Your router is a small team of people you've hired to make sure you get only the letters that matter to you.
  
  The Team
  
  
• Firewall
  
• Router
  
• Switch
  
• Access Point
  
  
  First there's Firewall, his job is to stand at the mail box and take the letters that are coming in, read them and determine if they are letters that you actually want. He also looks out for you by throwing out letters you may be trying to send to a Nigerian Prince, or anyone else who doesn't have your best interest in mind..
  
  There's Router, he takes mail from Firewall and make sure it get's to Switch, and that mail Switch gives him is given to Firewall.
  
  Switch is this ridiculous little guy, he knows where you are at any given time if you're home. He takes the mail from Router and hands it off to you, and takes mail you want to send and gives it to Router (who gives it to Firewall), he also takes mail from one room of your house to another. Switch does this all simultaneously.
  
  If Switch knows you aren't within a room in the blueprints he has memorized, but are still able to get your mail somehow he gives it to Acess Point (AP for short).
  
  AP folds your letters into paper airplanes and throws them to you, and gives the paper airplane letters you throw back to switch. He can only throw or catch one plane at a time though, if he sees two in the air at any given point he ignores both of them and tells the people who threw them to wait different amounts of time before trying to throw the paper airplane again (which of course is done so by paper airplane). ^(This is why gaming on WiFi is so much worse than on a wired connection. Having any other devices on WiFi dramatically increases the likelihood that packets will be dropped and resent, especially if those other devices are doing frequent transfers. e.g. Streaming, web browsing, etc. The number one thing to kill a consistent online gaming experience is a separate VoIP service running on WiFi at the same time.)
  
  ^((If you play Splatoon on WiFi, andhave an Amazon Prime account.) ^A__LAN_adapteris$9^(, and will dramatically improve any "lag" issues you may be experiencing) ^(even if you don't notice them now!)^)
  
  
  Phew, still with me? Good, we're almost done
  
  
  
  Ideally this would all be done by different people, but you probably don't receive enough mail to make it worth hiring one person for each job; so you hire one guy to do it all for you.
  
  A DDoS, in this case, is the equivalent of having this show up at your doorstep. Router works as fast as he possibly can, he has to examine each and every envelope and make sure that it's something you actually want so he can get it to you. The problem is two more of those things show up before he's done and he never manages to get to the point of sending your mail.
  
  Since your friends are no longer getting mail from you, they stop trying to keep you in the loop.
  
  **
  
  Wordy, but accurate enough to hopefully help you (and everyone else who reads this) gain a functional understanding of everything your "Wireless Router" is actually* doing.