Every packet that is transmitted over a packet-switching networkÑsuch as the Internet, the largest such network in existenceÑis constructed of two major pieces: the packet header and the data. Within the header are several distinct pieces of information about the packet itself.
https://whatismyipaddress.com/tcp-ip
In this lab, we’ll investigate the IP protocol, focusing on the IP datagram. We’ll do so by. analyzing a trace of IP datagrams sent and received by an execution of the traceroute. program (the traceroute program itself is explored in more detail in the Wireshark. ICMP lab).
https://www.cs.uic.edu/~i450/WireShark_Labs/Wireshark_IP_Sept_15_2009.pdf
M: marker 1 bit; it is very specific to VoIP: M=1 indicating that the packet is the first speech packet after a silence period. Note: in some implementations of buffer playout schemes, it is used to detect the start of a talkspurt (cf. Ref. [4]);
https://www.vocal.com/voip/voice-over-ip-packet-structure/
VoIP packet structure reflects to a great extent the hierarchical structure of the OSI (cf. Ref. [2]). A VoIP packet is composed of the IP header, followed by the UDP header, followed by RTP header, and finally followed by the payload (see Figure 1). Figure 1: Structure of the VoIP packet (as in IPv4) By noting the sizes of the individual headers, the minimum size of the IP/UDP/RTP packet’s header is 40 bytes, which of course is a tangible overhead (for example, for a 20ms VoIP packet with G.711 PCM, the overhead is 25%, which is not negligible from the viewpoint of the network traffic).
https://www.vocal.com/voip/voice-over-ip-packet-structure/
Voice over IP Packet Structure This note’s purpose is to provide a brief refresher on the VoIP packet structure and offer a brief reference to other notes on topics related to VoIP. The information in this note is related to the IPv4.
https://www.vocal.com/voip/voice-over-ip-packet-structure/
Then the following fields: 1  Timestamp – 32 bits. The timestamp reflects the sampling instant of the first octet in the RTP data packet. The sampling instant is derived from a clock (incrementing monotonically and linearly in time) to allow synchronization and jitter calculations; 2  SSRC: synchronization source – 32 bits.
https://www.vocal.com/voip/voice-over-ip-packet-structure/
Version The first header field in an IP packet is the four-bit version field. (In IPv4 packets, this is always equal to 4.)Internet Header Length (IHL)The second field (4 bits) is the Internet Header Length (IHL), which is the number of 32-bit words in the header.
https://en.wikipedia.org/wiki/ipv4
Most networks use TCP/IP as the network protocol, or set of rules for communication between devices, and the rules of TCP/IP require information to be split into packets that contain both a segment of data to be transferred and the address where the data is to be sent.
https://whatismyipaddress.com/tcp-ip
Additionally, the header information that describes the number, type and error correction data of the packet allows every packet to provide information about the message as a whole, allowing for easier reconstruction and correction than is possible under circuit-switching transmissions.
https://whatismyipaddress.com/tcp-ip
Then the following fields: 1  Timestamp – 32 bits. The timestamp reflects the sampling instant of the first octet in the RTP data packet. 2  SSRC: synchronization source – 32 bits. It identifies synchronization source. 3  CSRC: contributing source – 32 bits.
https://www.vocal.com/voip/voice-over-ip-packet-structure/
what is the first header of an ip packet
The first header field in an IP packet is the four-bit version field. The first header field in an IP packet is the four bit version field.