What is the main function of bridging on OSI layer 3?

The main function of bridging relates to its role in connecting different network segments, which facilitates communication between devices in those segments. Bridging operates at OSI layer 2, primarily dealing with the data link layer, by making decisions based on MAC addresses. However, the question specifically pertains to layer 3, which is where routing occurs. This layer is responsible for sending packets from a source to a destination across various network segments and is integral to how data travels across networks.

Choosing sending packets from source to destination accurately reflects the function of layer 3, as it involves packet forwarding and routing decisions based on logical addressing (IP addresses). This corresponds to layer 3's role in ensuring data can traverse from one network to another.

While bridging typically refers to layer 2 functionality, the interpretation can be influenced by its purpose in ensuring seamless integration of network segments, which indirectly supports the overarching goal of packet transmission, more explicitly associated with layer 3 functions.