Most important Show commands for CCENT

1.show ip route 

      - AD/Metric.
      - know how to find out which interface/subnet 
        an IP packet will pass out from.
     

2. show interface g0/0
       
       - know why the following counters increase 
         collisions , late collisions , CRC
       - up , down , administratively down  : difference

3. show ip nat statistics ,show ip nat translations

       - hits, alloted , total translations,expired translations
       [ ICMP return Ping translations can be 10 as return,
         but does not show ]

4. show interface brief

5.show vlan brief

6.show interface trunk

7.show interface switchport ,show interface g0/1 switchport