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What is Logical Network ?

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  • Last Updated : 31 May, 2022
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A logical network is a model of the connection between entities in which each entity is defined by a node, and the links between nodes represent the connections. The goal of using this model is to understand how different parts of an organization are related to one another. In other words, it can be used to understand how tasks or resources are allocated within an organization based on its capacity (availability) and needs (priority). Logical networks also help us see patterns in our data that would not be evident when looking at individual pieces of information.

The source and destination are connected by a network, which is made up of various elements and parts. Physical and logical components are the two categories used to represent the elements and parts of a network. Each element is represented by its own physical or logical component, with the exception of hosts which have no corresponding physical or logical part because they can not be mapped to another hosting type (components like switches, routers, and gateways are supposed to be non-host components).

Logical Network

 

In the diagram, the logical components of a network refer to the information that travels from source to destination. TheUser information includes the data transported in a framework via the network. Frames have three parts: 

  • The header
  • The data 
  • The trailer

Frames have destination addresses using which data is traveled to its intended destination.

And if we talk about the physical components of a network then network hardware devices like a switch and the cabling are utilized. These devices make it possible to carry the data from source to destination that makes up the complete physical network. 

  • The user thinks that it is a single self-contained and independent entity network although it might be possible that it is a portion of a large network or a LAN (Local Area Network).
  • The mapping is one-to-one between a physical network and a logical network interface/device.
  • Packets can be exchanged between logical interfaces on the same logical network.
  • The purpose of using subnets is to provide communication between logical interfaces that are sharing the same physical interface.  Thus, it can be determined whether sending packets from one logical network interface to another logical network interface on the same logical network is possible using the subnet mask.
  • For example, you can think of a logical network comprising devices from different networks around the globe as in a global enterprise where the computers of site managers from different countries might be connected as a single logical network to support quick and smooth communication even though they are separated by continents. 
  • It also finds its applications in distributed applications due to the involved binding of distributed components as a single group or single entity. Thus, the arrangement of Logical network components is also used in the representation of business environments, departments like engineering, finance, etc.

For example, let us assume the IP address 192.168.0.1/24 could be the logical network. Therefore, a logical network consists of the following:

Network ID - 192.168.0.1
Subnet mask-  /24 = 255.255.255.0
Usable IP addresses= 2 8  - 2 = 254 IP addresses
Broadcast address - 192.168.0.255

The above information is available in every logical network and is used to determine the usability of the design according to our requirements.

So, select the best possible IP numbering scheme and the subnet mask will find the count of usable IP addresses. In the case of multiple networks within the organization, then let not have overlapping of similar networks. The available networks must be unique to avoid routing issues.

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