What is Packet Switching? What is Circuit Switching? Compare them.

Packet Switching:

Packet Switching is a communication paradigm that breaks data into small packets before transmitting them across a network. These packets travel independently from the source to the destination, and they may take different routes to reach their final endpoint. This approach contrasts with Circuit Switching, where a dedicated communication path is established between the sender and receiver for the entire duration of the communication.

Key Characteristics of Packet Switching:

1. Packetization:
   - In Packet Switching, data is divided into smaller packets, each containing a portion of the overall information.
   - These packets are typically assigned headers, which include information like the source and destination addresses, as well as sequencing information.

2. Routing:
   - Packets can take different routes to reach the destination.
   - Routers and switches in the network make decisions about the optimal path for each packet based on current network conditions.

3. Parallel Transmission:
   - Multiple packets from different sources can travel simultaneously through the network.
   - This parallel transmission enhances the efficiency of data transfer.

4. Scalability:
   - Packet Switching is highly scalable, as it allows for the flexible use of network resources.
   - The network can accommodate varying data rates and adapt to changing conditions.

5. Efficiency:
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