OSI Model

Question 1

How many Layers are there on OSI Model

Answer 1

Please do not throw sausage Pizza away
Physical,Data link, Network, transport, session, Presentation and Application

Question 2

Cable media(Bounded) - Examples

Answer 2

Copper cable, Fiber optics cable (Physical conductor)

Question 2

What are the two main types of Physical Layer transmission media

Answer 2

Cabled(Bounded) of Wireless (Unbounded)

Question 3

What does physical Layer specify about the network layout

Answer 3

Physical Topology (Layouts or nodes/link/segments sharing media)

Question 4

What does physical layer specify about conections

Answer 4

Physical interface (Cable type, connectors,pins,radio/antenna specs)

Question 5

What is Physical Layer

Answer 5

Transmits/ Receives raw signals representing bits

Question 6

How does the OSI model help with device/apps?

Answer 6

Help identify which specific layer they work at

Question 7

What is data Encapsulation

Answer 7

Addinf control info (header/trailers) to data as it goes down layer

Question 8

Data flow on receiver side direction

Answer 8

Physical to Application

Question 9

Data flow on sender side direction

Answer 9

Application to Physical

Question 10

What is OSI model important

Answer 10

Help understand network function, implementation, troubleshooting by identifying the layer roles

Question 11

Protocols
(Why is it important in networking)

Answer 11

Enable device/systems to communicate using common standards

Question 12

what is Decapsucation

Answer 12

Removing header as data goes up the layers

Question 13

What is PDU

Answer 13

Protocol data Unit
Data chunk with header at specific layer

Question 14

Segments/Datagram gets Network header. What is it called

Answer 14

Packets or Datagram

Question 15

Packets gets a Data Link header/trailer. What is this called?

Answer 15

Frame

Question 16

Frame turned into Raw signal called as?

Answer 16

Bits

Question 17

What does data encapsulation starts in OSI

Answer 17

Application Layer (Moving down)

Question 18

What happens at transport layer during encapsulation? What added? What is data unit called?

Answer 18

Data brakes into pieces; Adds L4 header(ports)
units = Segments
TCP/UDP(datagram)

Question 19

What happens in Network Layer

Answer 19

Receiving segments/datagram; Adds L3 header(iP address)
Units = packets/ data gram

Question 20

Data Link Layer during encapsulation

Answer 20

Receive packets; Add L2 header (Mac address) and L2 trailer (error check)
Units = Frame

Question 21

What happens at Physical Layer

Answer 21

Receive Frames, Convers into raw signals (electrical, light,etc)
Units = bits

Question 22

Cabled(Physical)

Answer 22

Physical signal conductor provided between 2 nodes
Ex : Copper cable
fiber optic cables

Question 24

Physical Layer Example

Answer 24

Transceiver, Repeater, Hubs, Media converter