Default Mask

Default Mask

Default Mask

When a router receive a packet with a destination address, it needs to route the packet. A router outside outside the organization route the packet based on the network address and a router inside the organization route the packet based on the subnetwork address.

  • Network Address
  • Sub Network Address
  • Default Mask
  • Subnet Mask

The router outside the organization has a routing table with one coulmn based on the network address. The  router inside the organization has a routing table based on the subnetwork address.

 

 Class Default Mask
 A  255.0.0.0
 B  255.255.0.0
 C  255.255.255.0