The RB493 has nine ethernet ports and three miniPCI slots, it also has a switch chip, so the ethernet ports of your choice can be grouped together to make it act as a switch.
RB493 includes RouterOS - the operating system, which will turn
Design, Installation, and Support of all kinds of networks (LAN, WAN, MAN ...)
Implementation of Wireless Networks (PtP, PtMP(WDS), Mesh Networks)
VPN & VOIP solutions for geographically variable or multi office organizations
Implementation of all servers (ISA, Exchange, Citrix ...) in all environments (Win2003, 2008, UNIX, Linux)