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Networking > OSI TCP/IP model > Flashcards

OSI TCP/IP model Flashcards

1
Q

The 4 layered TCP/IP model layers

A

Application (Application, Presentation, Session)

Transport (Transport)

Internet (Network)

Network Access (Data Link, Physical)

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2
Q

Application Layer.

Brief Description and layer number

A

Allows a client application to access resources on a network using various Protocols
Layer 7

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3
Q

Data Link Layer

A

Frames data for placement on the local network link

Layer 2

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4
Q

Data Link Layer’s Protocol Data Unit (PDU)

A

Frames

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5
Q

Network Layer’s Protocol Data Unit (PDU)

A

A Packet

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6
Q

Transport Layer’s Protocol Data Uni (PDU)

A

A Segment

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7
Q

Layer 5 and above Protocol Data Unit

A

Data

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8
Q

Physical Layer’s Protocol Data Unit (PDU)

A

A bit

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9
Q

Encapsulation and Decapsulation

A

Data travelling down each of the OSI layers. At each layer a header and sometimes a trailer is added to the original data.
Once it reaches the physical layer it is sent across the network as a signal to the receiving device and Decapsulation does the same process but in reverse order.

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10
Q

Which Layer do Hubs and Repeaters live on ?

A

Layer 1
Physical Layer
Only effective in small LANs

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11
Q

Layer 1

A

Physical

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12
Q

Layer 1 devices

A

Repeaters, Hubs

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13
Q

Layer 2

A

Data Link

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14
Q

Layer 2 Devices

A

Standard Switches (L2 Switches)

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15
Q

Layer 3

A

Network

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16
Q

Layer 3 Devices

A

Routers

Multi Layer Switches

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17
Q

Layer 4

A

Transport

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18
Q

Layer 5

A

Session

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19
Q

Layer 6

A

Presentation

20
Q

Layer 7

A

Application

21
Q

Layers of the OSI model. Top to bottom.

A

7) Application
6) Presentation
5) Session
4) Transport
3) Network
2) Data Link
1) Physical

22
Q

Network Layer summary

A

Responsible for addressing and moving packets around the network
Layer 3

23
Q

OSI Model Acronym for Layers

A 
All
People
Seem
To
Need
Data
Processing
24
Q

Physical Layer summary

A

Encodes bits into an appropriate signal for transmission on the physical medium
Layer 1

25
Q

Presentation Layer Summary

A

Affects how data is presented for transmission across a network
Encryption, ASCII
Layer 6

26
Q

Routers

A

Connect multiple networks together
Layer 3 - Network Layer
Uses IP addresses and routing tables

27
Q

Session Layer

A

Opens, Maintains and closes a communication session.

Layer 5

28
Q

Switches

A

Layer 2 - Data Link

Used within a LAN

29
Q

Transport Layer

A

Segments and Sequences Data to be transported over the network.
Also provides error checking
Layer 4

30
Q

What is the medium ?

A

The way in which digital devices are connected. e.g Phones transmitting through a wireless signal.
Cables. Fibre-optic, copper

31
Q

Order the networking PDUs into the correct order (top to bottom) for encapsulation for transmission over a network connection.

A

Segments
Packets
Frames
Bits

32
Q

This TCP Model layer would be the equivalent to the OSI Model’s Network layer

A

Internet

33
Q

This TCP Model layer would be the equivalent to the OSI Model’s Data-Link and Physical layers

A

Network Access Layer

34
Q

This TCP Model layer would be the equivalent to the OSI Model’s Transport layer

A

Transport Layer

35
Q

This TCP Model layer would be the equivalent to OSI Model’s Application, Presentation and Session layers.

A

Application

36
Q

NIC’s OSI Model Layer

A

Data Link

37
Q

What does OSI stand for ?

A

Open Systems Interconnection.

38
Q

Allows a client application to access resources on a network using various Protocols

A

Application Layer

39
Q

Frames data for placement on the local network link

A

Data Link Layer

40
Q

Data travelling down each of the OSI layers. At each layer a header and sometimes a trailer is added to the original data.
Once it reaches the physical layer it is sent across the network as a signal to the receiving device

A

Encapsulation

41
Q

Layer that Routers & Multi Layer Switches live on ?

A

Layer 3

Network

42
Q

Segments and Sequences Data to be transported over the network.
Also provides error checking

A

Transport Layer

43
Q

Opens, Maintains and closes a communication session.

A

Session Layer

44
Q

Responsible for addressing and moving packets around the network

A

Network Layer

45
Q

Encodes bits into an appropriate signal for transmission on the physical medium

A

Physical Layer

46
Q

Affects how data is presented for transmission across a network
Encryption, ASCII

A

Presentation Layer

Networking (9 decks)

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