User exec – before enable – Router>
Privileged exec – after enable – Router#

Configure terminal - command to access configuration
Interface mode - to configure one of the network interfaces.
Line mode - to configure the console, AUX, Telnet, or SSH access.

Interface fa0/1 – to enter interface
The hostname name global configuration command is used to assign a name.
enable secret password global config command
banner motd delimiter message delimiter command from global configuration mode.
reload 	/ erase startup-config – more hardcore version

 To determine the destination MAC address, the device uses ARP.
ARP provides two basic functions:
• Resolving IPv4 addresses to MAC addresses
• Maintaining a table of mappings
 The ARP request message includes: • Target IPv4 address • Target MAC address
show ip arp

Before: maybe set clock rate on one router, and disable on second one


1. Give addresses to computers

STATIC ADDRESSING:

enable
conf t
interface serial 12/0
ip address 172.17.1.1 255.255.255.0
no shutdown

enable
config t
interface serial 13/0
ip address 182.16.1.33 255.255.255.0

IF Router to router:
interface ...
ip address..
clock rate 250000 (for those what has clock on wire)
no shutdown
exit

RIP:
configure terminal
router rip
network 10.0.0.0 (add addresses of all networks)

RIP v2:
configure terminal
router rip
version 2
network 10.0.0.0 (add addresses of all networks)
do wr