1. In order for a network like the internet to work, protocols need to be in place. A lot of them! Fill in the blanks
2. The layered models that are used in modern computer networks are two; the OSI model (Open Systems Interconnection) and the TCP/IP model (Transmission Control Protocol/ Internet Protocol)
3. Various 'models' have been developed to help people think about how protocols are organised. Fill in the blanks
4. So, what really is a 'layer'? (remember it is not an actual thing it is a conceptual model)
5. In the four layer model (TCP/IP) as with other models, protocols in one layer can only interact with layers directly above and below them.
7. Examine the following list. Which one of the following in the list is NOT a valid protocol.
8. In the four layer model the Network (Data link) layer is always no. ____________________ at at the ______________.
9. The fourth layer, usually depicted at the top, is called the ________________ layer.
10. This layer holds protocols that governs how data moves in an out of applications (like web browsers, email applications and servers).
11. The _______________ can only interact with the transport layer because it is directly above it.
12. This layer contains protocols or rules that govern the transport of data packets across a network.
13. The _________ part of the TCP/IP internet protocol is an example of a protocol in the transport layer.
14. The transport layer provides services for both ___________ mode and ________________ transmissions.
15. Connection mode is when the transmitter just sends packets of data without actually setting up a session (unlike a telephone call)
16. This layer is responsible for checking for errors.
17. This layer contains protocols that govern how messages are prepared before they are sent and how they are unpacked after they are received.
18. This layer is responsible for handling the physical connection to the network. For example 'Ethernet' is partly a physical protocol so is included here.
19. The functions of the network or data link layer include:
20. What layer do the following protocols belong in?
21. What layer do the following protocols belong in?
22. What layer do the following protocols belong in?
23. What layer do the following protocols belong in?
24. Communication protocols can be categorised by which layer they fit into within the four layer model.
25. There are two ways of categorising protocols: _____________ or ________ protocols.
26. A ________ protocol has a hardware aspect to it, meaning that it defines what hardware is needed to support it.
27. The _____________ protocol includes definitions of the performance required of cables, plugs and sockets. E.g 100m is the max length of an Ethernet Cat-5 cable before a repeater is needed.
28. Logical protocols are not concerned with anything physical - they define the structure,format and control of data entities.
29. In the four layer model, logical protocols exist in layers ______________
30. On reading the following excerpt, can you fill in the blanks?