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Framing
Framing In computer networking, framing is a technique used to organize and encapsulate data packets before they are transmitted over a network. Think of it...
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Framing In computer networking, framing is a technique used to organize and encapsulate data packets before they are transmitted over a network. Think of it...
In computer networking, framing is a technique used to organize and encapsulate data packets before they are transmitted over a network. Think of it as a wrapper for your package, ensuring it arrives at its destination without getting mixed up with other data packets.
Imagine your packet as a little parcel filled with information. When it enters the network, the data link layer wraps it in a frame. This frame includes the packet's header, which contains information like the source and destination addresses, the length of the packet, and other metadata. The frame also contains a data field, which holds the actual data.
Here's how framing helps:
Encapsulation: It hides the underlying network infrastructure from the application layer, making it easier to develop and maintain applications.
Error detection and correction: The frame can include checksums, allowing the receiver to check if the data is transmitted correctly and identify and correct any errors.
Flow control: The frame can include space for the network to send additional information, like the total number of packets in a sequence.
Security: The frame can be encrypted, ensuring that only authorized parties can access the data.
Examples of framing:
Point-to-Point (PPP) protocols: These use frames to ensure both ends of the connection receive the data correctly.
Ethernet: Each Ethernet frame includes a header containing the destination's MAC address, allowing devices to find each other.
Virtual LAN (VLAN): Frames are used to create logical segments of the network, ensuring that only devices within the same VLAN can communicate with each other.
By understanding framing, you gain a deeper understanding of how data is transmitted across a network, and you appreciate the various techniques used to ensure its integrity and security