Sharing internet with 2 USB ethernet adapters?

Question

Is it possible to connect the MBA via one USB Ethernet adapter to a LAN and share it with another USB adapter? Basically internet sharing from wired to wired.

Answer 1

...but the only way to know for sure...is to buy a 2nd USB Ethernet adapter which is a waste of money if it doesn't work
I didn't bring it up in the previous post, but since the discussion is going to continue...I would argue that getting a second USB wired ethernet adapter is a "waste of money." Why not get a router? OSX's Internet Sharing turns the Mac into a NAT device. This is the primary function of a typical home router. For about the same price as (or only a few dollars more than) the Apple USB ethernet adapter, you can get a router which will probably provide better throughput performance than Internet Sharing, especially if the machine you're sharing to is doing a heavy download, it likely slow down your machine even if you're not doing anything on the internet. (e.g.: Your Word Processing may will slow down if the other computer starts streaming Netflix.)
You can get small routers, if portability is needed and the 4-port wired switch is not essential. (i.e.: the Macbook has built-in wireless, as does most if not all portable computers.) I got one from D-Link that is the size of a deck of cards and runs off a USB port so no AC power is needed (although an AC adapter is included.) And of course Apple has the Airport Express.
To put it another way: you got a Macbook Air, which doesn't have any wired ethernet ports, but now you want two, and will use up all of your USB ports to do so. One could argue that you got the "wrong computer" for your needs. And even then, I would argue that a router is the "correct computer" to share one wired network connection.
Or can you make the defense and show significant negatives to using a router in your use case. And you have to go beyond price because a wired router is around $50 and often goes on sale for as low as $30, the same as the Apple USB ethernet adapter. And a wireless router is in the $70 range, with sale prices going down to $50. So I argue that a router is a better value.
(edit: for that matter, I forgot to ask, what kind of network connection are you trying to share? If it's like a university or other LAN where you can obtain more than one IP address, then you don't even need a router. A simple hub/switch will do, which I've seen on sale as low as $10, and free when people throw away their old junk. Hmmm, the price of the router could now be $0 if you have a friend that is upgrading their router to 802.11n. )