Selecting Switches or Routers from the device-type selection box lists both Cisco devices and some devices labeled Generic. These are custom Packet Tracer devices running on Cisco IOS, but the slots that hold the modules are different.
A router provides connectivity between two logical networks. Every router in Packet Tracer can be switched on or off by using the provided power button.
The power switch is required to make a device simulate its real counterpart. Modules can be added or removed only after powering off the device. If the running configuration is not saved, power cycling a device will make it lose its configuration.
The following routers are available in Packet Tracer: