Converts the data into electrical signals

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

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

Passes data to the local physical network

What is layer 3 responsible for?

Transmitting the data across different networks

TCP/IP covers rules about how...

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

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

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

Identify some advantages of layering:

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

These electrical signals can then be...

Transmitted over any transmission media, Understood by the network hardware

What does layer 1 do?

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

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

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Questions 15

Answers

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

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