Can You Put Two Routers on One Cable Internet Connection?

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Can You Put Two Routers on One Cable Internet Connection?
The WAN port or Internet port is typically set apart from the others. (wlan router 02 image by pmphoto from Fotolia.com)

There are two ways to put two routers on one cable modem. They can be put in parallel or as a series. Series connections do not need any agreement with the Internet service provider.

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Parallel connection

Parallel connections are used if two addresses are available from the Internet service provider and the two services need to be independent. Connect the WAN port or the Internet port of each router to an Ethernet switch or hub. Connect the switch or hub to the cable modem and each router will acquire it's own address independently. Each router can be managed without interfering with the service of the other router.

Can You Put Two Routers on One Cable Internet Connection?
A hub or switch can connect two routers to one modem. (network connection image by stresskiller from Fotolia.com)

Series Connection

If the two routers will be managed by the same organisation, they can be connected in a series. Connect the WAN or Internet port of one or the routers to the cable modem. This will become the dominate router. Connect the WAN or Internet port of the second router to one of the LAN ports of the first router.

Can You Put Two Routers on One Cable Internet Connection?
The WAN port of one router can connect to an Ethernet port of another. (ADSL Router image by Phil2048 from Fotolia.com)

Wireless and wired

If one of the routers is wireless and one is not, the wireless router should be used as the dominant router. Connections behind the secondary router have a extra level of security to protect them against rogue wireless traffic.

Can You Put Two Routers on One Cable Internet Connection?
Plug the wired router into the wireless router. (computer wires image by Allyson Ricketts from Fotolia.com)

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