Topic 6.1 Flashcards

1
Q

What is the Function of the Application layer?

A

It is where the User interface is and it is basically the human interaction with applications that uses the internet and have many application protocols to organize data

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2
Q

What is the Function of the Presentation Layer?

A

It Has 3 Basic Functions which is
1) Translation of data to make it presentable
2) Compression of Data to make efficient transfer
3)Encryption/Decryption for security purposes

in transmitting and receiving of data the presentation layer perform these 3 functions as and when is needed

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3
Q

What is the Function of Session Layer?

A

It is basically responsible for managing connections/session between devices. it is also responsible for authentication and authorization of accessing certain connections between devices or servers.

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4
Q

What is the Function of Transport Layer?

A

it has 3 Basic Functions
1) Segmentation
2) Flow Control
3) Error Control

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5
Q

What is Segmentation?

A

Segmentation is basically breaking down of Big data received from session layer into small segments and adding your source and destination port numbers and sequence numbers to the data.
Port Number: is to direct the data to which internet based application
Sequence Number: is to tell you which order to arrange the data in

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6
Q

What is Flow Control?

A

Flow Control Basically means it Syncs the Transfer and receiving speed of 2 communicating devices so that no loss of data and misinterpretation of data will happen.

(Eg. 100Mbps PC Transfer to 10Mbps Phone. Max receiver is 10Mbps so u transport layer will tell PC to transfer at 10Mbps so no errors)

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7
Q

What is Error Control?

A

It is Basically responsible for checking if there is any missing data and using signal protocols to ensure there is no missy data when passing the segments to the next layer

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8
Q

The Transport layer have 2 Services/Protocols What are they?

A

1) TCP (Transmission Control Protocol: Wired) Slower
2) UDP (User Datagram Protocol: Wireless) Faster

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9
Q

What is the Function of the Network Layer?

A

It has 3 Basic Functions
1) Logical Addressing/ IP Addressing
2) Routing
3) Path Determination

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10
Q

What is Logical Addressing / IP Addressing?

A

It is the process of adding the source and destination IP Address to encapsulate the segment to form data packets so that the data knows where to go and who its from

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11
Q

What is Routing?

A

Routing is Basically Done by the Router and it is basically like a Highway system where the Router has a routing table and the first 3 digits represent the name of the Highway exit. it matches the packet IP address with the routing table and directs it where to go

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12
Q

What is Path determination?

A

It is basically the process of finding the best and fastest and most efficient path the data can travel to reach it’s destination the fastest

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13
Q

What is The Function of Data Link Layer?

A

It is responsible for controlling when device should transmit data to prevent collision of data in the case of 2 PC sending data to the hub at the same time and Physical addressing where the MAC address is build into the NIC and also to check for errors with FCS

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14
Q

What is the Function of Physical Layer?

A

The Physical Layer is Basically Responsible for converting digital Binary data Bits into Analogue physical signals in the form of either electric voltage, optical signal or radio waves.

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15
Q

What is usually in the Frame?

A

1) FCS
2) S and D MAC address
3) S and D IP address
4) S and D Port Numbers
5) Sequence Number
6) Data

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16
Q

What is the 3 Data units that are associated with Transport, Network and Data link Layers?

A

Transport = Segments
Network = Packets/ IP Packets
Data Link = Frames

17
Q

What Does the First 3 pairs and Last 3 pairs of digit represent in MAC address?

A

1) First 3 Represents the Original Equipment Manufacturer
2) Last 3 Represents the Unique Number that is Associated with the NIC

18
Q

What does the First 3 Segments and the Last Segment of Numbers on IP Address represent?

A

1) The First 3 Segments of Numbers Represent the Network ID (Identification)
2) The last Segment Represents the Host/computer ID

Network ID represent the network that the device is on
Host ID represent the actual device address on the network