TCP then reassembles the
packets back into a whole stream, figures out what type of data it is, and approaches the
appropriate port for that data type (port 110 for POP email servers, as an example).
Where does UDP fit in the scheme of things here? It is a connectionless protocol.
Applications that use UDP just choose a destination and start sending. UDP is usually used
for small amounts of data or on fast and reliable networks. Some peer-to-peer networks also
use UDP.
TCP/IP Addressing
Here is one thing you should get straight at the beginning of your networking studies: local
area network (LAN) addressing is distinct from Internet addressing, even if they are based
on the same protocol stack. This can lead to some level of confusion, in part because in
Unix, even a standalone computer that never interacts with another machine still has a
loopback IP address.
Internet IP addresses (also known as ???public??? IP addresses) are assigned by an addressing
body like the American Registry for Internet Numbers (ARIN), which is the body in charge
of IP addresses for the United States.
Pages:
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985