Internetworking Technologies Handbook, Fourth Edition

Appendix A. Answers to Review Questions

Chapter 1

1:	What are the layers of the OSI model?
A1:	Answer: Application, presentation, session, transport, network, data link, physical. Remember the sentence “All people seem to need data processing.”
2:	Which layer determines path selection in an internetwork?
A2:	Answer: Layer 3, the network layer.
3:	What types of things are defined at the physical layer?
A3:	Answer: Voltage levels, time of voltage changes, physical data rates, maximum transmission distances, physical connectors, and type of media.
4:	What is one method of mapping network addresses to MAC addresses?
A4:	Answer: ARP, Hello, predictable.
5:	Which includes more overhead, connection-oriented or connectionless services?
A5:	Answer: Connection-oriented. ...