Technical data

datagram
A self-contained package of data carrying enough information to be routed from
source to destination without reliance on earlier exchanges between source and
destination or the transporting network.
datagram fragment
The result of fragmenting a datagram. Fragments carry a portion of data from
the larger original and a copy of the original datagram header. The header
fragmentation fields are adjusted to indicate the fragment’s relative position
within the original datagram.
datagram reassembly time
The time allowed for reassembly of a fragmented datagram.
datagram service
The mode of delivery for a datagram which is delivered in such a way that the
receiver can determine the boundaries of the datagram as it was entered by the
source.
DCE
See Distributed Computing Environment.
DCL
See DIGITAL Command Language.
decision
The routing process that determines the path, or route, along which a data packet
travels to reach its destination; forwards packets on the lowest-cost path even if
that one does not have the fewest hops. The path that the data takes through the
network is transparent to users.
decoding
The process by which the transfer syntax representation of a data value is
transformed into the local representation of that value.
dedicated serial connection
A permanent connection between two hosts using an RS232 serial port. SLIP or
PPP can be used for TCP/IP communication between the two hosts.
default route
The route used to direct any data addressed to network host addresses for which
no explicit route is specified.
delay
A HELLO metric. Valid values are from 0 to 30000, inclusive. The value of 30000
is the maximum metric and means unreachable. See metric and HELLO.
delete access
The access right that grants users the ability to remove data from the domain.
DEK
See data encryption key.
DES
See Data Encryption Standard.
designated router
In OSPF, a designated router is a multiaccess network that has at least two
attached routers. The designated router generates a link state advertisement
Glossary–12