When comparing TL-WR902AC vs ZyXEL Wireless N 3-in-1 Travel Router, the Slant community recommends TL-WR902AC for most people. In the question“What are the best portable routers?” TL-WR902AC is ranked 1st while ZyXEL Wireless N 3-in-1 Travel Router is ranked 4th.
Specs
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Pros
Pro Can be used to connect a device with Ethernet
Since it has two ports, you can use one to connect to the internet, and the other to connect a device to the router using wired connection. This lets you use a device at full speeds without being hindered by wireless speed limitations.
Pro Extremely small and portable
At 2.91 x 2.3 x 0.59 inches it's the size of a few small cards stacked on top of each other.
Pro Can be used for both WAN and LAN connectivity
Has two gigabit Ethernet ports that can be used for WAN and LAN connectivity.
Cons
Con Range could be better
The range of this router is kinda lacking. While for a travel router range is not that important, since most of the time the router will be right next to you all the time but with this router the signal will start dropping considerably even behind a single wall.