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Home/ Questions/Q 3165
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Vipin Chauhan
Vipin ChauhanLevel 30
Asked: September 16, 20212021-09-16T13:48:24+05:30 2021-09-16T13:48:24+05:30

What Ipv4 Header Field Identifies The Upper Layer Protocol Carried In The Packet?

What Ipv4 Header Field Identifies The Upper Layer Protocol Carried In The Packet?
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    1. Maryam Khalid Bronze
      2021-09-28T00:40:21+05:30Added an answer on September 28, 2021 at 12:40 am

      What IPv4 header field identifies the upper-layer protocol carried in the packet?

      An Ip stand for the internet protocol and it is responsible for communication over the networks. The Ip transfer the information in the form of frames or packets which consist of the header to the destination address. The IP has two types such as:

      • IPv4.

      An ipv4 is the 32-bit address.

      • IPv6.

      An IPv6 is the 64-bit address.

      The functions of the internet protocol are the delivery of packets, addressing, and fragmenting the data into frames. The ipv4 header is the highlight of today’s discussion and it will also give the answers to the question what IPV4 header determines the upper layer protocol carried in the packet? Let’s discuss the field of the IPv4 headers.

       IPv4 header and fields 

      The header of the IPv4 has 14 fields, 13 is necessary while the one is the optional one. In the header, the field with the effective byte first are packed and the significant byte always comes in front which is the number 0.Let’s begin to evaluate a few fields of the header in the following section:

      Version:

      The field determines the internet header and the IP version. It contains four bits it means only 4 bits are used by it.

      Internet header length:

      The header of the IPv4 size is flexible due to the 14 filed which is optional. This file has stored the information of the header size of IPv4. The 4 bits in it determine the 32-bit word in the header. in the byte, the field contains 20 bytes. And the maximum size of the IHL in the byte is 60 bytes.

      Type of services

      A network service provider is given by this file of the IPv4 header.

      Total length 

      The 16-bit area defines the complete packet length in bytes, together with the header and data. The minimal length is 20 bytes while the most are 65,535 bytes. All hosts are required that allow you to rearrange datagrams of length as much as 576 bytes, however, maximum present-day hosts manage tons of large packets. Links can also additionally impose additional regulations at the packet length, wherein case datagrams are necessary to be fragmented. Fragmentation in IPv4 is accomplished in both the sending host or in routers. Rearrangement is accomplished on the destination host.

      Protocol field 

      The 8-bit number in the header of the IPv4 is the protocol filed. What kind of protocol is necessary for the packets is determined by this field? And the most important protocol is the TCP and UDP. It can identify the protocol of the upper layer in the packets or frames as well.

      Header checksum 

      Header checksum is the 16-bit field and is responsible for the error detection in the header. The checksum of the header and the field when the frames reached the router. The data field errors are handled with the help of the encapsulation protocol.

      Source and destination address 

      The source field has the IP address of the source while the destination Filed stores the IP address of the destination port.

      Conclusion 

      The IPV4 has 14 fields and one field is optional while the other ones are essential. The fields have their role and the protocol field is the field that can identify the upper-layer protocol in the header packets.

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