What is the second software layer of the Open Systems Interconnection reference model called?

network

TCP/IP

data link is the answer

protocol

The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.

If the null hypothesis is false and the researchers do not reject it a type 2 error has been made. true or false

Should teachers be allowed to have guns at school? why or why not?