1 modem, 2 routers, 2 different networks

Setup:

ISP
 +
 +  ---------------------    -----------------------------------------
 +  | Internet Modem    |    | Router 1                              |
 +  |                   |    |                                       |
 +  | CABLE     ETHERNET|    |  WAN    LAN1    LAN2     LAN3    LAN4 |
 +  |-- + -------- + ---|    |-- + ------------------------------ + --
 ++++++++          +++++++++++++++                                +
                                                                  +
                                 ++++++++++++++++++++++++++++++++++
                                 +                                
                             |-- + -----------------------------------
                             |  WAN    LAN1    LAN2     LAN3    LAN4 |
                             |                                       |
                             |                                       |
                             | Router 2                              |
                             -----------------------------------------
Router 1 = LinksysEA2700
Router 2 = unknown for now (don't have access to it yet)

Router 1 IP = 192.168.1.1 DHCP enabled
Router 2 IP = 192.168.2.1 DHCP enabled

I have a few questions:

1. Will clients connected to network Router 1 and Router 2 have access to Internet? (there won't be any firewall or other restrictions)
2. Will clients connected to Router 1 be able to see data from clients on Router 2?
3. Will clients connected to Router 2 be able to see data from clients on Router 1?

Basicly what I need is 2 separate (isolated) networks.

Thank you!

What I would do is get a simple 5-port switch, and run that off of the modem directly. Then off the switch, add the two routers, each plugged into the WAN port. This will make them completely independent of each other, and both access the Internet. The two routers will only let computers attached to each one connect to each other, but not through the other router.

When doing it this way, you need to make sure your ISP will give you 2 IP addresses. In Canada, I know that Telus and Shaw give two IP addresses for their accounts, even to home users