Network+ Osi Model Study Guide

Front 1

What is the OSI Mnemonic?

Back 1

Please do not throw sausage pizza away

Front 2

What is layer 1 of the OSI model?

Back 2

Physical layer. (Wire, hubs)

Front 3

What are some examples of the OSI Physical Layer?

Back 3

Wire, hubs. (layer 1)

Front 4

Wire and Hubs are examples of which OSI layer?

Back 4

Physical Layer (layer 1)

Front 5

What is layer 2 of the OSI Model?

Back 5

Data link. (NICs, switches, bridges, WAPs)

Front 6

What are some examples of the OSI Data Link layer?

Back 6

NICs, switches, bridges, WAPs (layer 2)

Front 7

NICs, switches, bridges, WAPs are examples of which OSI layer?

Back 7

Data Link Layer (layer 2)

Front 8

What is layer 3 of the OSI Model?

Back 8

Network Layer (routers)

Front 9

What is an example of the OSI network layer?

Back 9

Routers (layer 3)

Front 10

Routers are an example of which OSI layer?

Back 10

Network layer (layer 3)

Front 11

What is the 4th layer in the OSI model?

Back 11

Transport layer (assemble and disassemble packets)

Front 12

What does the Transport layer of the OSI model do?

Back 12

Assembles and disassembles packets (layer4)

Front 13

What OSI model layer assembles and disassembles packets?

Back 13

Transport Layer (layer4)

Front 14

What is the 5th layer in the OSI model?

Back 14

Session Layer (syncs data communication between apps on separate devices. Handles error detection and notification to the peer layer on the other device)

Front 15

What does the Session layer of the OSI model do?

Back 15

Syncs data communication between apps on separate devices, and handles error detection and notification to the peer layer on the other device. (layer5)

Front 16

Which OSI model layer syncs data communications between apps on separate devices and handles error detection and notification to the peer layer on the other device?

Back 16

Session Layer (layer5)

Front 17

What is the 6th layer in the OSI model?

Back 17

Presentation Layer (data conversion)

Front 18

What does the Presentation layer of the OSI model do?

Back 18

Converts Data from the application layer into a format that can be sent over the network. (layer6)

Front 19

Which OSI model layer converts Data from the application layer into a format that can be sent over the network?

Back 19

Presentation Layer (Layer6)

Front 20

What is the 7th layer in the OSI model?

Back 20

Application Layer (API's that provide network access for end user programs)

Front 21

What does the Application Layer of the OSI model do?

Back 21

Provides network access API's to end user programs (layer 7)

Front 22

Which OSI layer provides access API's to end user programs?

Back 22

Application Layer (layer7)

Front 23

Application layer (detailed)

Back 23

Layer 7, provides access to the network for apps and user functions. It displays incoming info and prepares outgoing info for the network.

Front 24

Presentation layer (detailed)

Back 24

Converts the Data from the app layer into a format that can be sent over the network. It converts data from the session layer into info understood by the application layer. Handles encryption and compression.

Front 25

Session layer (detailed)

Back 25

Syncs data communication exchange between apps on separate devices. Handles error detection and notification to the peer layer on the other device.

Front 26

Transport Layer (detailed)

Back 26

Establishes/maintains/breaks communication between devices. Determines priority order of data. Performs packet error checking and verification. retransmits packets if needed.

Front 27

Network Layer

Back 27

Provides mechanisms for routing data across single or multiple network segments. Discovers destination systems and addressing.

Front 28

Data Link Layer

Back 28

Has 2 sublayers (LLC and MAC). Error detecion and handling for trasmitted signals. Defines hardware addressing.

Front 29

Physical Layer

Back 29

The structure of the network. Defines voltage/signal rates and connections as well as Topology.