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The Ethernet protocol's header includes the source MAC address.
The protocol field, in the IP header, identifies what kind of data is in the IP packet - the upper-layer protocol. For example, if the code is 6, that means that the data is a TCP segment.
UDP is a Transport layer protocol or fourth layer protocol. UDP is a connection less protocol used in transport layer. UDP header have four fields in total .
The Protocol field in the IPv4 header, which specifies the transport layer protocol used (like TCP or UDP), is not present in the fixed IPv6 header because IPv6 uses a more flexible approach with extension headers. Instead of a single Protocol field, IPv6 allows for multiple extension headers to be used, which can carry information about the transport protocol and other features. This design improves efficiency and scalability, enabling better handling of various protocols and options without cluttering the main header.
Ethernet
The AH (Authentication Header) protocol and the ESP (Encapsulating Security Payload) protocol both function within the network layer. They are part of the IPSec (Internet Protocol Security) standard.
The Transmission Control Protocol (TCP) is a core protocol of the Internet protocol suite. The sequence number and acknowledgement number are used to confirm receipt of data.
First result back from google for "http" is:Hypertext Transfer Protocol - Wikipedia, the free encyclopedia- 02:20Jump to HTTP 1.1 Upgrade header field‎: HTTP 1.1 introduced support for the Upgrade header field. In the exchange, the client begins by making a ...en.wikipedia.org/.../Hypertext_Transfer_Protocol - 6 hours ago - Cached - Similar -
Assuming IPv4 ICMP. Ping uses IP for transport. Ping in itself is an "Echo Request", which is a function of the ICMP protocol. The IP Packet will carry the ICMP protocol from end-to-end. ICMP has a protocol number of 1, so the "Protocol" field in the IPv4 header will contain "1" as a reference to the ICMP payload. For IPv6, ICMPv6 is used, and the transport will be IPv6.
next header
1)Header Length 2)Types of services 3)ID field 4)Flags 5)Offset 6)Total length 7)Time To Live 8)Protocol 9)Header Checksum 10) Source 11)Destination 12)IP options