Router Ports:
1- Console Port
for console session
password recovery
basic configuration
2- Serial Port
to remote access/ ssh telnet
3- Ethernet Port
to remote access ssh telnet
4- Aux Port
to remote access / modem
We have mode of router
1- User Exec Mode
Router>
2- User Privelege Mode
Router> enable
Router# # root / administrator in Linux
3- Global Configuration Mode
Router# config terminal
Router(config)#
4- Other Mode
interface mode
dhcp mode
vlan mode
router mode
etc