In this video, we have covered TCP/IP Model in detail. 

But to begin with, let us first see what is TCP/IP?
TCP/IP stands for Transmission Control Protocol/Internet Protocol. It is named after two main protocols that are used in the model, TCP and IP. Designed to describe functions of a communication system by dividing communication procedures into smaller and simpler components. TCP/IP is based on standard protocols. 
It is a set of rules and methods that are used to interconnect network devices on the Internet. 

Layers of TCP/IP Model:

Application Layer: The layer at the top of the TCP/IP model is the application layer. One application-layer protocol communicates with another application-layer protocol by transferring the information to the transport layer.

Transport Layer: Provides flow control, error control, reliability, and data correction when data is sent over the network. User Datagram Protocol(UDP) and Transmission control protocol(TCP) are the two protocols used at this layer.

Internet/Network: The Internet layer also called as Network layer, is the third layer of TCP/IP Model. This layer is responsible for sending packets from any network, and they arrive at the destination irrespective of the route they take.

Network Access: Layer bottom layer of TCP/IP Model. The physical Layer and Data link layer in the OSI Model are combined together and they are named Network Access Layer in TCP/IP Model. Responsible for the transmission of information between two devices over the same network.

Benefits of TCP/IP layer:
1) It is an industry-standard illustration that can be placed in organizing problems.
2) Allows interoperability by permitting cross-platform communications between different networks.
3) It is an open agreement suite. It isn’t claimed by anyone specific and can be utilized by any individual or organization.

Challenges of TCP/IP layer:
1) Bluetooth connection cannot be portrayed using TCP/IP Model.
2) It does not evidently separate the services concepts, interfacing, and protocols. So, it isn’t proper to depict unused advances in new networks.
3) Difficult to differentiate between physical and data link layers, which actually have distinguishing features.
4) Information interface layer is responsible for the transmission of outlines. 
5) Physical layer is responsible for the physical characteristics of the transmission.
6) Delivery of packets is not guaranteed by the transport layer in this model.

TCP/IP Model in Computer Networking: https://www.geeksforgeeks.org/tcp-ip-model/