Course Description

Concepts of IP Addressing

Understanding IP addressing is fundamental to networking. An IP address is a unique identifier assigned to devices in a network to allow communication between them. The IP address is divided into two parts: the network address and the host address. Subnetting is the process of dividing an IP network into sub-networks to improve performance and security.

IPv4 addresses are 32 bits long and are usually represented in dotted-decimal notation (e.g., IPv4 addresses are classified into classes A, B, C, D, and E based on the number of network and host bits. Class A addresses have a leading bit of 0, Class B addresses start with 10, and Class C addresses start with 110.

Subnetting allows network administrators to create smaller networks within a larger network. By dividing a network into subnets, traffic can be isolated, improving network performance and security. Subnet masks are used to determine which part of an IP address is the network portion and which part is the host portion. CIDR (Classless Inter-Domain Routing) notation is commonly used to represent subnet masks.

Understanding IP addressing concepts is crucial for network engineers, system administrators, and IT professionals. It forms the foundation of modern networking and is essential for designing, implementing, and troubleshooting network infrastructures. Mastery of IP addressing concepts enables professionals