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05 - Four Layer Model

 1. The four layer model is something that actually exists, an actual physical model - not a conceptual model or idea.

  FALSE

  TRUE

 2. The four layer model was developed to help us understand how ….

  the cables connect across small networks

  protocols and cables interconnect and engage with each other

  the different internet service providers behave in relation to the law

  the different protocols interact

 3. The four layer model is called the four layer model because …

  it has four cables associated with it and these are the main concept

  it has four layers!

  None of the above

  it looks like a cake in its architecture (and most cakes have four layers)

 4. Each 'layer' is given a number and a name and each layer has …

  a simplified cable structure

  an internet service provider to connect to

  a unique IP and MAC address

  a particular and specific function to perform

 5. The protocols in each layer can only communicate with those in the layers directly ….

  above and below it

  below it

  above it

  on it (in other words, only with itself)

 6. An example is: The TCP in layer 3 could only communicate with….

  layer 4

  layers 1,2,3,4

  layers 2 and 4

  layer 3

 7. Which of the following are the names of layers in the four layer model?
Names of layers in the four layer model?
===============================
1.Application layer
2.Cable Layer
3.Transport Layer
4.ISP Layer
5.Internet Layer
6.TCP/IP Layer
7.Network / Data Link Access Layer

  1,2,3,4

  1,3,6,7

  1,3,5,7

  1,2,3,6

 8. The protocols in this layer provide access to email files, and websites across an IP network

  Internet (also called the 'Network') Layer

  Network / Data Access Link Layer

  Transport Layer

  Application Layer

 9. The TCP part of the TCP/IP protocol resides in this layer.
Note: It is responsible for dividing messages into packets, 
adding sequence numbers and error correction information. 
It also checks and deals with errors of received data packets.

  Transport Layer

  Internet (also called the 'Network') Layer

  Network / Data Access Link Layer

  Application Layer

 10. The IP part of the TCP/IP protocol resides in this layer. It is responsible for managing the address of source and destination locations

  Application Layer

  Transport Layer

  Network / Data Access Link Layer

  Internet (also called the 'Network') Layer

 11. Protocols on this layer (1) are Ethernet and WI-FI.
Note: Protocols on this layer are responsible for actually
transmitting or receiving data via cables or wireless. 
This layer is responsible for handling the device's 
physical connection to the network.

  Wireless Layer

  Transport Layer

  Network / Data Access Link Layer

  Application Layer

 12. Protocols on this layer are FTP, HTTP, POP, IMAP and SMTP

  Network / Data Access Link Layer

  Application Layer

  Transport Layer

  Internet (also called the 'Network') Layer

 13. The benefits of using layers include:

  It can be difficult to conceptualise a complex system such as network communication

  All of the above

  It is useful for manufacturers so that when they are developing new hardware, they can ensure it is compatible with protocols

  It is useful to map how layers relate and interact with each other. New protocols can just be slotted in

 14. This layer, also called the 'Network' Layer delivers packets end-to-end across the Internet from the source to the destination.

  Internet Layer

  Network / Data Access Link Layer

  Transport Layer

  Application Layer

 15. The four layer model is sometimes called the TCP/IP Stack

  FALSE

  TRUE