To stack routers means to physically stack routers. Some stack a couple of routers on top of each other if they plan to just use them as switches or similar.
Wireless N routers have better range and much better transfer speeds than G routers.
Most routers are safe to use anywhere in the home, but if it's rated for outdoor use then it should be fine standing up to the elements.
apple routers
Linksys routers are pretty much the same as all the other routers. Linksys routers got 8 PINS. You can find the PIN if you turn the router upside down.
Modern networks used two devices for the data packets within the network will flow easily. The two devices are the routers and switches.
Some recommended books about Cisco routers are: Cisco Router Configuration, Cisco Routers For The Desperate, Cisco Routers for IP Router, Cisco CCNA Routing and Switching.
Belkin produces some of the fastest routers currently available.
It's a protocol that routers use to figure out how to get to other devices on the network. Even if they have to go through other routers and different networks.
Juniper Networks is a network equipment vendor. Routers are one such piece of network equipment. Therefor "Juniper routers" are likely routers made by Juniper Networks. Find more info on their site at: http://www.juniper.net
You can purchase Makita routers online from retailers such as Amazon and Grainger. Alternatively, you can also purchase these routers from auction websites such as eBay.
Buffalo provides great support for their routers. In addition, their routers are very flexible and easy to modify.