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This Concept Map, created with IHMC CmapTools, has information related to: chp20, IP Datagrams and Datagram Forwarding IP datagram Concerning forwarding:because each destination in a routing table corresponds to a network, the number of entries in a routing table is proportional to the number of networks in an internet., IP Datagrams and Datagram Forwarding Destination and Next-Hop addresses The destination address in a datagram header always refers to the ultimate destination.When a router forwards the datagram to another router, the address of the next hop does not appear in the datagram header., IP Datagrams and Datagram Forwarding Virtual Packets Because it can connect heterogeneous newtorks, arouter cannot transmit a copy of a frame that arrives on one network across another., IP Datagrams and Datagram Forwarding IP datagram A packet sent across a TCP/IP internet is called an IP datagram, IP Datagrams and Datagram Forwarding IP datagram The size of a datagram is determined by the application that sends data., IP Datagrams and Datagram Forwarding Best-Effort Delivery because IP is designed to operate over all types of network hardware, the underlying hardware may misbehave. As a result, IP datagrams may be lost, duplicated, delayed, delivered out of order, or delivered with corrupted data. Higher layers of protocol software are required to handle each of these errors.