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fragmentation
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... addresses. The internet protocol also provides for
fragmentation and reassembly of long datagrams, if necessary, for
transmission through "small packet" networks ...
... smaller than the size of the datagram. To overcome this difficulty, a
fragmentation mechanism is provided in the internet protocol.
...
... Fragmentation ...
...
Fragmentation, transmission and reassembly across a local network
which is invisible to the internet protocol ...
...
The internet fragmentation and reassembly procedure needs to be able
to break a datagram into an almost arbitrary number of pieces that
...
... The copied flag indicates that this option is copied into all
fragments on fragmentation.
0 = not copied
...
...
May be copied, introduced, or deleted on fragmentation, or for
any other reason.
...
...
May be copied, introduced, or deleted on fragmentation, or for
any other reason.
...
... trigraphs, and are available from HQ DCA Code 530.
Must be copied on fragmentation. This option appears at most
once in a datagram.
...
... 3].
Not copied on fragmentation, goes in first fragment only.
Appears at most once in a datagram ...
...
The timestamp option is not copied upon fragmentation. It is
carried in the first fragment. Appears at most once in a
...
... internet service is datagram oriented and provides for the
fragmentation of datagrams at gateways, with reassembly taking place
...
... internet protocol module in the destination host.
Of course, fragmentation and reassembly of datagrams within a network
...
... allowed since this is transparent to the internet protocols and the
higher-level protocols. This transparent type of fragmentation and
reassembly is termed "network-dependent" (or intranet ...
... reassembly is termed "network-dependent" (or intranet) fragmentation
and is not discussed further here.
...
...
Fragmentation and Reassembly.
...
... Fragments are counted in units of 8 octets. The
fragmentation strategy is designed so than an unfragmented datagram
has all zero fragmentation ...
... fragmentation strategy is designed so than an unfragmented datagram
has all zero fragmentation information (MF = 0, fragment offset =
...
...
When fragmentation occurs, some options are copied, but others
remain with the first fragment only.
...
... internet module must be able to forward a datagram of 68
octets without further fragmentation. This is because an internet
header ...
...
The fields which may be affected by fragmentation include:
...
... bit is set, then internet
fragmentation of this datagram is NOT permitted, although it may be
discarded. This can be used to prohibit fragmentation ...
... fragmentation of this datagram is NOT permitted, although it may be
discarded. This can be used to prohibit fragmentation in cases
where the receiving host ...
...
The fragmentation and reassembly procedures are most easily
described by examples. The following procedures are example
implementations.
...
...
An Example Fragmentation Procedure
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... than the maximum size datagrams. For example, one could implement
a fragmentation procedure that repeatly divided large datagrams in
half until the resulting fragments ...
... time to live, additions or
changes to internet options, or due to fragmentation. This checksum
at the internet ...
... internet fragments that might result from the
fragmentation of this datagram if the maximum sized transmission
allowed were 280 octets.
...
... Shoch, J., "Packet Fragmentation in Inter-Network Protocols," Computer Networks, v. 3, n. 1, February 1979. ...