What is TCP/ IP Model & Difference Between TCP & IP-Explained

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Transmission Control Protocol & Internet Protocol Suite Exlpained







What is TCP/IP?

What is TCP/IP?    

TCP/IP(Transmission Control Protocol/ Internet Protocol) is a protocol through which Internet works. By using this protocol one computer receive & send a packets on any network in the world.It is designed to make network reliable & it is a connection oriented.(Packets:- It is a unit of data transmitted to one location to another location. It is a smallest unit of sending or receiving data over internet.)

 Previous Article:- FTP VS SMTP                                                    

(For example of TCP/IP suite:You must have noticed when we make a call on SKYPE first connection gets create between you & the Calling person then only we can make a call. This is how it name itself connection oriented.)

 

what is TCP

 

Defining TCP

As mentioned in the name TCP/IP. TCP is responsible for taking a large amount of data, into packets and sending them on their path in order to receive by the end person, it turns this process into useful information/data.

 
What is IP

Defining IP

IP protocol basically works on location allowing the packets to sent & received to the correct location.

 
TCP/IP Model
TCP/IP Model

EP. 07 | What is TCP/IP? | Difference B/W TCP VS IP

                   

TCP/ IP Model

TCP/IP is normally considered to be a 4 layer system. The 4 layers are as follows :  

1.Application layer

2.Transport layer

3.Network layer

4.Data-link layer

1. Application layer

This is the top layer of TCP/IP protocol suite. This layer includes applications or processes that use to transport layer protocols to deliver the data to the destination computers. At each layer has a certain protocol options to carry out the task designated to that particular layer.

Some of the popular application layer protocols are:

HTTP (Hypertext transfer protocol)

FTP (File transfer protocol)

SMTP (Simple mail transfer protocol)

SNMP (Simple network management protocol)

2. Transport Layer

This layer provides backbone to data flow between two hosts. Transport layer receives data from the application layer above it. There are many protocols that work at this layer but the two most commonly used protocols at transport layer are TCP and UDP. TCP is used where a reliable connection is required while UDP is used in case of unreliable connections.

TCP(Transmission Control Protocol) divides the data(coming from the application layer) into proper sized chunks and then passes these chunks on the network because It acknowledges received packets, waits for the acknowledgments of the packets it sent and sets timeout to resend the packets if acknowledgements are not received in time.

The term ‘reliable connection’ is used where it is not desired to loose any information that is being transferred over the network through this connection. So, the protocol used for this type of connection must provide the mechanism to achieve this desired characteristic.

For Example: While downloading a file, it is not desired to loose any information(bytes) as it may lead to corruption of downloaded content.

EP. 07 | What is TCP/IP? | Difference B/W TCP VS IP

                   
UDP(User Datagram Protolprovides a comparatively simpler but unreliable service by sending packets from one host to another.

UDP does not take any extra measures to ensure that the data sent is received by the target host or not. The term ‘unreliable connection’ are used where loss of some information does not hamper the task being fulfilled through this connection.

For example while streaming a video, loss of few bytes of information due to some reason is acceptable as this does not harm the user experience much.

3. Network Layer

This layer is also known as Internet layer. The main purpose of this layer is to organize or handle the movement of data on network. By movement of data, we generally mean routing of data over the network. The main protocol used at this layer is IP. While ICMP(used by popular ‘ping’ command) and IGMP are also used at this layer.

4. Data Link Layer

Data Link layer is also known as network interface layer. This layer normally consists of device drivers in the OS and the network interface card attached to the system. Both the device drivers and the network interface card take care of the communication details with the media being used to transfer the data over the network.

In most of the cases, this media is in the form of cables. Some of the famous protocols that are used at this layer include ARP(Address resolution protocol), PPP(Point to point protocol) etc.

advantages of internet protocol suite
Advantages of internet protocol suite

Advantages of Internet Protocol suite:

1. It is operated independently.

2. TCP/IP is scalable.

3. It brings a connection Oriented. 

4. Therefore, It is reliable.

5. Client/server architecture

6. Can be use to create connection between computers.

Disadvantages of TCP/IP
Disadvantages of TCP/IP

Disadvantages of Internet Protocol suite:

1. This model cannot be use in any other application.     

2. Replacing protocol is an easy task.

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