transport layer
Description of the RTP connection
The source and destination IP addresses
service port number
Simplified header format. IPv6 has a fixed length header, which does not include most of the options an IPv4 header can include. Even though the IPv6 header contains two 128 bit addresses (source and destination IP address) the whole header has a fixed length of 40 bytes only. This allows for faster processing. Options are dealt with in extension headers, which are only inserted after the IPv6 header if needed. So for instance if a packet needs to be fragmented, the fragmentation header is inserted after the IPv6 header. The basic set of extension headers is defined in RFC 2460.
in tcp header (32 bits) we have a field that is called options and padding that has variable in length and the header length shows the actual header size i.e size of 20 octets+size of options and padding field and in UDP we dont have any field like that and its header is fixed of 8 OCTETS (32 bits header size) refrence: WIRELESS COMMUNICATIONS AND NETWORKS by William Stallings Second Edition pg 91(see fig)
To reassemble the segments into data.
The original data stream is broken into pieces, called "segments"; each segment is numbered (numbering is by bytes, not by segments). Other header information is added too, for example, the origin and destination port numbers.The original data stream is broken into pieces, called "segments"; each segment is numbered (numbering is by bytes, not by segments). Other header information is added too, for example, the origin and destination port numbers.The original data stream is broken into pieces, called "segments"; each segment is numbered (numbering is by bytes, not by segments). Other header information is added too, for example, the origin and destination port numbers.The original data stream is broken into pieces, called "segments"; each segment is numbered (numbering is by bytes, not by segments). Other header information is added too, for example, the origin and destination port numbers.
It shows the header information..
Message Header
Applicant's personal contact information
who hold the header information is called headerfile.
The data link layer header contains the destination and source of information of the original frame and device sending information. You will also find that it contains the information of the device to receive it.
The Basic Header contains information about the source of the message. The Application Header contains information about the message type and the destination of the message. The contents of the trailer block include both user information (checksum, message authentication, proprietary authentication, and so on) and system information (delayed message, message reference, possible duplicate message, and so on).
The header and footer in a document are very important. These notes can give the reader more information about the document they are reading.
souce and destination ports
source and destination port
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