Logical grouping of information sent as a network layer unit over a transmission medium without prior establishment of a virtual circuit. IP datagrams are the primary information units in the Internet. The terms frame, message, packet, and segment are also used to describe logical information groupings at various layers of the OSI reference model and in various technology circles.
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Wireless Datagram Protocol (WDP) works as the transport layer of WAP. WDP processes datagrams from upper layers to formats required by different physical datapaths, bearers, that may be for example GSM SMS or CDMA Packet Data. WDP is adapted to the bearers available in the device so upper layers don't need to care about the physical level.
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Monday, May 12, 2008
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Connectionless Broadband Data Service. European highspeed, packet-switched, datagram-based WAN networking technology. Similar to SMDS.
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Saturday, May 10, 2008
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It is a sequence of
IP addresses identifying the route a datagram must follow. A source
route may optionally be included in an IP datagram header
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Monday, April 28, 2008
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The
data unit created at the application layer is called a message, at the
transport layer the data unit created is called either a segment or an
user datagram, at the network layer the data unit created is called the
datagram, at the data link layer the datagram is encapsulated in to a
frame and finally transmitted as signals along the transmission media.
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Monday, April 28, 2008
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Switched Multimegabit Data Service
(SMDS) is a high-speed, packet-switched, datagram-based WAN networking
technology used for communication over public data networks (PDNs)
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Monday, April 28, 2008
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