5. The process-to-process delivery of the entire message is the responsibility of the ـــــــــــــ layer.

6. The ـــــــــ layer is responsible for moving frames from one hop (node) to the next.

7. The ـــــــ layer is responsible for delivering data units from one station to the next without errors.

8. The session, presentation, and application layers are the ......... support layers.

9. The physical, data link, and network layers are the ـــــــــ support layers.

10. The ــــــــــ layer is responsible for the process-to-process delivery of the entire message.

11. The ....... layer lies between the network layer and the
application layer.

12. The Internetworking Protocol (IP) is ـــــــ protocol.

13. The ___ layer links the network support layers and the user
support layers.

14. ICMPv6 includes ___.

15. The ____ address uniquely defines a host on the Internet.

16. The _ layer coordinates the functions required to transmit a bit stream over a physical medium.

17. The _ layer is responsible for the source-to-destination delivery of a packet across multiple network links.

18. Mail services are available to network users through the _ layer.

19. The __ created a model called the Open Systems Interconnection, which allows diverse systems to communicate.

20. The __ layer changes bits into electromagnetic signals.

21. IPv6 has __ -bit addresses.

22. The __ address identifies a process on a host.

23. The __ layer is responsible for the delivery of a message from one process to another.

24. The __ layer enables the users to access the network.

25. The TCP/IP __ layer is equivalent to the combined session, presentation, and application layers of the OSI model.