Contents of this article
In this article I describe IPv4 addressing system in networking for ccna. I can give you an overview of IPv4 addressing system in networking for ccna, along with examples.
The Internet Protocol version 4 (IPv4) addressing system is the most widely used protocol for assigning unique numerical addresses to devices connected to a network. IPv4 addresses are 32-bit numerical identifiers expressed in dotted-decimal notation, consisting of four octets separated by periods (e.g., 192.168.0.1). Each octet represents a byte of the IPv4 address, ranging from 0 to 255.
IPv4 Address Components:
- Network Portion: The network portion of an IPv4 address identifies the network to which a device belongs. It specifies the network address or subnet to which the device is connected.
- Host Portion: The host portion of an IPv4 address identifies the specific device (host) within the network. It distinguishes individual devices on the same network.
IPv4 Address Classes:
IPv4 addresses are divided into several classes based on their network size and structure:
Class A:
Class A addresses have the first bit set to 0 and can support a large number of hosts on a small number of networks. The first octet represents the network portion, and the remaining three octets represent the host portion. Example: 10.0.0.1.
Class B:
Class B addresses have the first two bits set to 10 and can support a moderate number of hosts and networks. The first two octets represent the network portion, and the last two octets represent the host portion. Example: 172.16.0.1.
Class C:
Class C addresses have the first three bits set to 110 and can support a large number of networks with a smaller number of hosts per network. The first three octets represent the network portion, and the last octet represents the host portion. Example: 192.168.0.1.
Class D:
Class D addresses are reserved for multicast addressing and are used for one-to-many communication. They have the first four bits set to 1110.
Class E:
Class E addresses are reserved for experimental or future use and have the first four bits set to 1111.
IPv4 Addressing Example:
Let’s consider an example of assigning IPv4 addresses to devices in a small network:
- Network: 192.168.1.0/24 (Class C network)
- Router: 192.168.1.1
- Hosts:
- Host 1: 192.168.1.2
- Host 2: 192.168.1.3
- Host 3: 192.168.1.4
- …
- Host n: 192.168.1.254 (Maximum host address in a /24 subnet)
In this example:
- The network portion is 192.168.1, which identifies the network to which all devices belong.
- The host portion varies for each device, with unique addresses assigned to individual hosts within the network.
- The subnet mask for the network is 255.255.255.0 (/24), indicating that the first 24 bits of the address represent the network portion, and the remaining 8 bits represent the host portion.
Conclusion for IPv4 addressing system in networking
IPv4 addressing allows devices to communicate within the same network and across different networks using routing protocols. However, due to the limited address space of IPv4 (approximately 4.3 billion addresses), IPv6 has been developed to accommodate the growing number of devices connected to the internet. I hope you found this article helpful related to IPv4 addressing system in networking for ccna. You may drop a comment below or contact us for any query or suggestions related to the contents of this website.
