Which of the following protocols works at the LOWEST layer of the OSI model?

After the Performance Analyzer lists its analysis results, Access can perform recommendations and suggestions automatically, but idea optimizations must be performed manually

Indicate whether the statement is true or false

Which common channel signaling (CCS) mode does the transfer of messages relating to signaling between two points occur directly over links interconnecting the signaling points?

a. Associated. b. Nonassociated. c. Quasi-associated. d. Multi-associated.