In this article, we gonna see about Switching. Switching is the Essential and Important part of the Networking field. We can say that it is the backbone of Networking. It is very important to understand the topic.
To understand why we need it, Let's take a Scenario. For Example, You have 5 systems and you want to connect all of them to each other. To establish the connection you will need so many wires. In that case, everything will gonna mesh up. Look at the picture provided.
- Now, look at the correct description. The network contains multiple switching devices. To connect multiple devices, one solution would be to have a point to point the connection between the two devices. But this increases the value of communication.
- To overcome this problem, we use switching ort switches.
#Switching: The solution could be to have a central device and connect every device to each other via the central device which is generally known as Star Topology.
- To learn about topologies, see my blog Introduction to Networking.
- A modified network is made up of a series of interconnected nodes called Switches.
#Types of Switching:
1. Message Switching: Here each message is treated as an independent unit and includes its own destination source address by its own.
- Each complete message is then transmitted from one device to another through the internetwork.
- Each central device receives a message and saves it until the next device is ready to receive it.
- For this reason, the message exchange network is sometimes called Store Switching and Forwarding.
- We are not using this switching in the current world scenario.
#Advantages of Message Switching:
- More devices share the same channel
- Congestion can be reduced
- Supports message lengths of unlimited size
#Disadvantages of Message Switching:
- Not compatible with voice and video
- It is very expensive as the store and transfer devices are expensive
- Can lead to security issues if hacked
- Not reliable
2. Circuit Switching: Circuit change is often used on social networks. It exists to handle voice traffic over digital data.
- After the link is inserted between the sender and the recipient the information is continuously transferred over the provided link.
- A dedicated link/router is established for every sender and recipient that is maintained throughout the conversation.
#Advantages of Circuit Switching:
- Guaranteed data rate
- No waiting time at each switch
- Suitable for long continuous transmission
#Disadvantages of Circuit Switching:
- Other nodes cannot use the same channel.
- Require more bandwidth.
- The time required to establish a visual link is too long.
3. Packet Switching: To improve the efficiency of transmitting information through a shared communication line, messages are separated by packets of fixed size, numbered.
- Network devices are called routers which are used to direct packets between networks.
#Betters of Changing the Pack:
- Good network usage
- Advanced-Data Transfer
- No large memory required
- No method required
- Suitable for video/voice calls
- Low operating costs
#The disadvantages of changing the package:
- Order variations
- Transmission delay
- Packet loss
- Start-up costs
- Security issues
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