IPv4 Address parts

IPv4 Address is divided into 2 parts:

• 1. Network Port

  2. Host Portion

1. Network Portion (NID):

• Network Portion also called Network ID (NID) is used to identify a specific Network.

• Upon receiving the packet, a Router looks at the DIP & matches the Network Address stored in its Routing Table.

• The Real-life equivalent of NID is a Pin code of an area where only your area code is mentioned but not your read house address

Host Portion (HID):

• Host Portion also called Host ID (HID) is used to identify a specific endpoint (devices) on a Network.

• E.g. A PC, SmartPhone, Servers, Printers, etc.

• The Real-life equivalent of HID is your House Room Number where your actual House Address is mentioned but not your Pin code.

Reference:

• https://www.udemy.com/course/cisco-ccent-icnd1-100-105-complete-course-sims-and-gns3/learn/lecture/6087452#overview