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TCP/IP Model

By Anandkumar MurugesanAnandkumar Murugesan

Home » Software Development » Software Development Tutorials » Network Security Tutorial » TCP/IP Model

TCPIP-Model

What is the TCP/IP Model?

TCP/IP expands as Transmission Control Protocol/Internet protocol. Here all network communication between computers can be established. In this article, we will briefly discuss the TCP/IP Model.

Understanding TCP/IP Model?

The united states defence department initially developed the Internet protocol suite during the year 1970s. It allows us to connect among heterogeneous systems and holds a popular set of communication protocols. TCP and IP are the most popular suits among the developed ones. It is much more pioneer than the OSI model.

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How TCP/IP works?

Below are a few points explaining the work of TCP / IP

1. Network Access Layer

Here, the OSI model’s physical layer and data link layer combine to form the network access layer. It allows the transmission of data physically by the protocols and hardware elements of the layer. The ARP is measured to be available at layer 3 and sum up by layer 2 protocols.

2. Internet Layer

Functionally very similar to the OSI network layer. All protocols for data transmission logically are defined here. the protocols here are,

  • IP –Termed as Internet Protocol, and it is accountable for distributing packets. This distribution is achieved between the source and the destination through the IP addresses in the packet headers. IPv4 and IPv6 are the most used versions. All current websites use IPv4. IPV6 is largely growing in numbers.
  • ICMP –Expanded as Internet Control Message Protocol. All network program’s information is scripted here, measured to be sum up with IP datagrams.
  • ARP –Expanded as Address Resolution Protocol. ARP is used to determine the hardware address from the specified Internet protocol address. the major classifications of ARP are Reverse ARP, Gratuitous ARP, Proxy ARP, and Inverse ARP.

3. Host-to-Host Layer

Very much equivalent OSI model transport layer. All complexities of data are shielded from the upper layers. the key protocols here are

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  • Transmission Control Protocol (TCP) –It is branded to supply steadfast and error-free communication among end systems. It carries out the segmentation of data and the sequencing process. Largely effective but holds it is a very effective protocol. It also provides greater transparency which leads to the greater cost of this protocol.
  • User Datagram Protocol (UDP) – It is very cost-effective here can be used when security is not a great factor; this is a connectionless protocol.

4. Process Layer

All functions of the top three layers of the OSI model are done here. Application Layer, Session Layer, and Presentation layer. It is responsible for controlling user-interface specifications and node-to-node communication. mostly used protocols are, HTTP SNMP, NTP,NFS, HTTPS, FTP, TFTP, Telnet, SSH, SMTP, DNS, DHCP, NFS, X Window, LPD.

  • HTTP and HTTPS 

Stands as a Hypertext transfer protocol. Here the server and browser communication are managed using these HTTP and HTTPS protocols. SSL and HTTP are mixed up here. It is well-organized for browser form fill out cases, sign in, validate and take out bank transactions.

  • SSH 

SSH expands as Secure Shell. Very much similar to telnet, it is also a terminal emulation software. The reason SSH is preferred is that it retains an encrypted connection mainly. From a security perspective, it is a highly secured network.

  • NTP 

NTP expands as Network Time Protocol. It is worn to harmonize the clocks in the computer to a single standard time zone. Largely plays a vital role in bank oriented transactions.

Advantages of TCP/IP Model

Below are some of hyhe advantages given.

  • It is a model that can be deployed for network Oriented problems.
  •  It allows communication among heterogeneous networks.
  • It is an open network protocol suite; this makes it available for an individual or an institute.
  • A client Oriented architecture that is scalable hence allows network additions without current services.
  • For every system on the network, an IP value has been assigned.

Scope of TCP/IP Model

In the communication world, the base unit is packets, and these packets are built by using TCP/IP protocols. Every operating system has several sole ethics coded keen on its functioning of the TCP/IP stack. OS fingerprinting works on this basis, By swot up these exclusive ethics, values like MTU and MSS. It has been whispered previous to identify the irregular; there is a need first to recognize what is usual. This acts as the need to recognize the normal TCP/IP packet looks and the procedure through which TCP/IP itself picks up communications between computers. By staring at genuine packets that are blubber off the wire through a packet imprison utility like tcpdump or the win32 alike windump. At the instance of double-clicking on the web browser, a syn packet has been sent out and also, a syn/ack packet is returned to the user. Next, a set of ack packets are followed by psh/ack packets that allow exchanging data front and back.

Conclusion

TCP/IP (TN) powerfully positions as a network communication protocol and programs that allow accessing remote terminals and computers through internet systems.

Recommended Articles

This is a guide to TCP/IP Model. Here we discussed the basic concept, how to work TCP, the advantages of TCP/IP, the scope of TCP/IP. You can also go through our other suggested articles to learn more –

  1. What is the TCP Protocol?
  2. What Is Networking Protocols
  3. Routing Protocol
  4. User Datagram Protocol

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