A subnetwork is a divided portion of a larger network. More specifically, subnets divide an IP network logically into numerous, smaller network pieces. Data is sent from one computer to another via the internet using the Internet Protocol (IP). Every machine, or host, on the internet is uniquely identified by at least one IP address.
A subnet is a tool used by organizations to partition enormous networks into more manageable subnetworks. To reduce traffic, a subnet divides a large network into a collection of smaller, connected networks. By eliminating these superfluous routing steps, network speeds are increased. The segmentation of a network address space through subnetting increases the effectiveness of address distribution.
How do subnets work?
While routers are used to communicate within subnets, each subnet enables communication amongst its linked devices. The connectivity needs and the network technology used determine a subnet’s size. A data center subnet may be built to link many more devices than a point-to-point subnet, which only permits two devices to connect.
Within the constraints of the address space available for its use, each organization is in charge of deciding the number and size of the subnets it establishes. The specifics of subnet segmentation inside a company are also kept within that company.
A subnet can be divided into smaller subnets on its own, giving companies the freedom to do so for things like point-to-point communications or subnetworks that support a small number of devices.
The organization’s criteria for subnet size and the number of subnets determine how many bits the subnet mask contains. There are many different subnet mask lengths. While this adds some complexity to network addressing, it considerably enhances the efficiency of network address utilization.
What purposes do subnets serve?
- Redistribution of IP addresses. A maximum number of hosts can be allocated to each class; for instance, networks with more than 254 devices require a Class B allocation. If a network administrator is managing a Class B or C network and needs to assign 150 hosts to three physical networks in three different cities, they will either need to request more address blocks for each network or divide the network into subnets so that administrators can use a single address block on multiple physical networks.
- Reducing network sluggishness. Placing computers on the same subnet can minimize network traffic if a significant amount of an organization’s traffic is intended to be shared frequently between the same cluster of computers. Without a subnet, every server and computer connected to the network would be exposed to data packets coming from every other device. So, subnets can help lower sluggishness of the AvalancheGo.
- Improving network security. By quarantining compromised network segments and making it harder for intruders to roam around an organization’s network, subnetting enables network managers are able to lower network-wide threats.
From this post, it is evident that subnetting is a crucial aspect for organization as it can reduce network sluggishness and improve network security.