Layer 3 identifies ... and/or establishes ...

The IP destination, A path across the network via routers to the destination

Passes data to the local physical network

Layer 2 establishes connections across the network + communicates with devices to agree on:

The size of packet to use, The speed data can be sent and received

Converts the data into electrical signals

These electrical signals can then be...

Transmitted over any transmission media, Understood by the network hardware

What is layer 3 responsible for?

Transmitting the data across different networks

TCP/IP covers rules about how...

To receive the data, To route the data, Data should be formatted

What does layer 1 do?

Data is in a form that is known to the receiving software

Identify some advantages of layering:

Make a complex system easier to develop, It creates standardized interfaces, Layers can be worked on independently

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Duplicate of Topic 7 - Layering - computer science revision - CCGS - OCR

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Questions 15

Answers

1
Layer 3 identifies ... and/or establishes ...
The IP destination
The packet size
A path across the network via routers to the destination
A route for network packets to be sent
2
Layer 4...
Sends data to WiFi
Passes data to the local physical network
Passes data to wide area networks
Passes packets to numerous networks
3
Layer 2 establishes connections across the network + communicates with devices to agree on:
The type of packet to use
The size of packet to use
The receipt type
The speed data can be sent and received
4
Layer 4 then...
Sends data through rays that can be read through laser light
Converts the data into electrical signals
Converts data into signals that aren't known by bad networks
Sends data through networks
5
Layers must be interoperable, what does this mean?
They must work alone
They must work in pairs
The must work independently
They must work together
6
These electrical signals can then be...
Transmitted over any transmission media
Transmitted over fibre-optic cable only
Understood by software
Understood by the network hardware
7
What is layer 4 known as?
Computer hardware
Protocol
Network
Internet
8
What is layer 1 known as?
Internet
Applications
Transport
Networks
9
What is layer 3 known as?
Internet protocol
Networks
Internet
Protocol
10
What is layer 3 responsible for?
The size of the packet
Ordering packets in order of size
Sending data in small packets
Transmitting the data across different networks
11
In order for layers to work, there must be...
Key points that set out how layers work
Only one layer
Defined rules or protocols
Defined key points
12
TCP/IP covers rules about how...
To protect data
To receive the data
To route the data
Data should be formatted
13
What is layer 2 known as?
Software
Transport
14
What does layer 1 do?
Data is in various forms
Data is in a form that is known to the receiving software
Data is in a different form to receiving software
Data is in 2 forms, one for receiving + one for production
15
Identify some advantages of layering:
Developers can work together on each layer
Make a complex system easier to develop
It creates standardized interfaces
Layers can be worked on independently

Duplicate of Topic 7 - Layering - computer science revision - CCGS - OCR Flashcards | StudBud