Computer Networking
Why does the data communication industry use the layered OSI reference model?1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.4. It encourages industry standardization by defining what functions occur at each layer of the model.

3 only
1 and 4
1 only
2 and 3

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
The packets switching concept was first proposed

in the early 1960s for military communication systems, mainly to handle speech
All of these
None of these
in the late 1950s for Defense Ministry of US
in the late 1980s for the Defense Ministry of US.

ANSWER DOWNLOAD EXAMIANS APP