: Identifies the specific device (workstation, server, router) on that network.
: Apply a logical AND operation. The "1s" in the subnet mask define the network portion. network id
All devices on the same physical network must share the same network ID to communicate directly without a router. 🏷️ Address Classes and Network IDs The length of a network ID depends on its : First Octet Range Network ID Length Class A 8 bits (1st octet) Massive networks with millions of hosts Class B 128 – 191 16 bits (1st two octets) Medium to large organizations Class C 192 – 223 24 bits (1st three octets) Small local networks Note: Class D is for multicasting and Class E is reserved . 🔍 How to Identify a Network ID All devices on the same physical network must
Every IPv4 address is a 32-bit number divided into two distinct parts: : Identifies the broader network segment. A is the portion of an IP address
A is the portion of an IP address that identifies the specific physical or logical network a device belongs to. It acts as a zip code for data packets, ensuring information reaches the correct "neighborhood" before finding a specific "house" or host. 🏗️ The Structure of an IP Address
: Set all host bits to 0 to reveal the final Subnet ID . Example (Class C) IP Address : 192.168.1.38 Subnet Mask : 255.255.255.0 Network ID : 192.168.1.0 ⚙️ Why Network IDs Matter Network ID - Spiceworks Community
: Convert the IP and subnet mask to binary.