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• ECNE
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DECnet
DECnet is a suite of network protocols
created by Digital Equipment Corporation,
originally released in 1975 in order to
connect two PDP-11 minicomputers. It
evolved into one of the first peer-to-peer
network architectures, thus transforming
DEC into a networking powerhouse in the
1980s. Initially built with three layers, it
later (1982) evolved into a seven-layer
OSI-compliant networking protocol.
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DECnet
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DECnet was built right into the DEC flagship
operating system VMS since its inception.
Later Digital ported it to Ultrix, as well as
Apple Macintosh and IBM PC running
variants of DOS and Microsoft Windows
under the name DEC Pathworks, allowing
these systems to connect to DECnet
networks of VAX machines as terminal
nodes. More recently, an open-source
version has been developed for GNU/Linux.
DECnet code in the Linux kernel was marked
as orphaned on February 18, 2010.
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DECnet Brief overview of the evolution of DECnet
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Although network protocol analyzer tools
tend to categorize all protocols from
DIGITAL as "DECnet", strictly speaking,
non-routed DIGITAL protocols such as
LAT, SCS, AMDS, LAST/LAD are not
DECnet protocols and are not part of the
DIGITAL Network Architecture.
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DECnet Brief overview of the evolution of DECnet
To trace the evolution of DECnet is to
trace the development of DNA. The
beginnings of DNA were in the early
1970s. DIGITAL published its first DNA
specification at about the same time that
IBM announced its Systems Network
Architecture (SNA). Since that time,
development of DNA has evolved through
the following phases:
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DECnet Brief overview of the evolution of DECnet
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DECnet Phase IV protocol suite
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DECnet Brief overview of the evolution of DECnet
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Digital also released a product called
the PATHWORKS client, and more
commonly known as the PATHWORKS
32 client, that implemented much of
DECnet Phase IV for DOS, and 16 and
32 bit Microsoft Windows platforms
(all the way through to Windows
Server 2003).
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DECnet Brief overview of the evolution of DECnet
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The Ethernet implementation was unusual
in that the software changed the physical
address of the Ethernet interface on the
network to AA-00-04-00-xx-yy where xx-yy
reflected the DECnet network address of
the host. This allowed ARP-less LAN
operation because the LAN address could
be deduced from the DECnet address.
This precluded connecting two NICs from
the same DECnet node onto the same
LAN segment, however.
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DECnet Brief overview of the evolution of DECnet
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The initial implementations released were
for VMS and RSX-11, later this expanded
to virtually every Operating System
DIGITAL ever shipped with the notable
exception of RT-11. DECnet stacks are
found on Linux, SunOS and other
platforms, and Cisco and other network
vendors offer products that can cooperate
with and operate within DECnet networks.
Full DECnet Phase IV specifications are
available.
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DECnet Brief overview of the evolution of DECnet
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At the same time that DECnet Phase IV
was released, the company also released
a proprietary protocol called LAT for serial
terminal access via Terminal servers. LAT
is entirely separate from DECnet, though
many DECserver LAT terminal servers did
use MOP for the server image download
and related bootstrap processing.
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DECnet Brief overview of the evolution of DECnet
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Enhancements made to DECnet Phase IV
eventually became known as DECnet
Phase IV+, although systems running this
protocol remained completely
interoperable with DECnet Phase IV
systems.
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DECnet Brief overview of the evolution of DECnet
It was later renamed DECnet/OSI to
emphasize its OSI interconnectibility, and
subsequently DECnet-Plus as TCP/IP
protocols were incorporated.
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DECnet Availability
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The DECnet protocols were designed
entirely by Digital Equipment
Corporation. However, DECnet Phase II
(and later) were open standards with
published specifications, and several
implementations were developed
outside DEC, including one for Linux.
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Packet-switched - DECnet
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However, DECnet Phase II (and later) were
open standards with published specifications,
and several implementations were developed
outside DEC, including one for
Linux.[http://archive.computerhistory.org/reso
urces/text/dec/dec.digital_1957_to_the_prese
nt_(1978).1957-1978.102630349.pdf] Digital
Equipment Corporation, Nineteen Fifty-Seven
to the Present, Digital Equipment
Corporation, 1978, page 53
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MelsecNet
'MelsecNet'[http://www.mitsubishiautomation.com/products/networks_melse
cnet10h.html] is a protocol developed and
supported by Mitsubishi Electric for data
delivery. MelsecNet supports 239
networks.
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MelsecNet
Mitsubishi provides a
[http://suport.siriustrading.ro/01.DocAct/1.
%20Automate%20programabile%20(PLC)
/1.4.%20Modulare%20MELSEC%20Q/1.4.
a.%20Manuale%20training/Melsec%20Q
%20%20Training%20Manual%20(MelsecNetH%20course)%20SH(NA)-080619A%20(01.06).pdf manual] for both the
variants Melsecnet/H and MelsecNet/10
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ECNEC
Executive Committee of National
Economic Council (ECNEC) is
Bangladesh's highest authority for
approving of development activities
reflective of long-term national policies and
objectives.
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ECNEC - History
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ECNEC structure and functions were laid
down in the Cabinet Division Resolution in
1982. In that year, it consisted of the
Ministry of Finance|Minister for Finance
and Planning as Convenor. Included in
the committee were Minister for Industries
and Commerce, Minister for Works and
Minister of the concerned ministry.
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ECNEC - History
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In 1982, Bangladesh was under martial
law and so the Principal Staff Officer
and General Staff Officer to the Chief
Martial Law Administrator and Chief of
the General Staff (Bangladesh)|Chief of
the General Staff were also required to
attend the meetings of the ECNEC in
1980s
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ECNEC - History
Depending on the nature of
administration of the country, ECNEC
structure and functions underwent
many changes since it has been
inaugurated. As an example, in July
1986, after the martial law as lifted
upon parliament election, Deputy
Chief Martial Law Administrator was
replaced by Deputy Prime Minister
replaced the Deputy Chief Martial
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ECNEC - History
The cabinet secretary, secretary
Planning, principal secretary of
Prime Minister's office, secretary of
External Resources Division,
secretary of Implementation,
Monitoring and Evaluation Division,
Governor of Bangladesh Bank, the
relevant members of the Planning
Commission and secretaries are also
required to assist ECNEC.
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ECNEC - Structure
! scope=col
style=background:#efefef; | Role in
ECNEC
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ECNEC - Supporting officials
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Following personnela are
required to assist ECNEC
committee.
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ECNEC - Meetings
ECNEC meeting take place at NEC
Conference room in city’s Sher-e-Bangla
Nagor. Meeting is held as and when
required while Planning Division provides
secretarial services to the ECNEC.
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Ecne
In Celtic mythology, 'Ecne' (Wisdom,
Old Irish ecna, ecne, wise, enlightened)
was one of the Tuatha Dé Danann and
was the god of wisdom, or
knowledge.[http://www.sacredtexts.com/neu/celt/rac/rac08.htm
MacCulloch, John Arnott: The Religion
of the Ancient Celts (1911) - chapter V,
The Tuatha Dé Danann] online at
sacred-texts.com (accessed 23 October
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Ecne
Ecne had three fathers, Brian
(mythology)|Brian, Iuchar, and Iucharba,
who were all sons of Brigid and Tuireann,
also known as Delbáeth.[http://www.sheeeire.com/MagicMythology/GodsGoddess/
Celtic/Gods/Ecne/page%201.htm Gods
Goddesses: Ecne] at shee-eire.com
(accessed 23 October 2007) They are
called the tri dee Donand, meaning the
three gods of Danu (Irish goddess)|Danu,
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Ecne
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Ecne's three fathers killed Cian, the father
of Lugh, and Lugh's deadly revenge is
recounted in The Fate of the Children of
Tuireann.[http://www.sheeeire.com/MagicMythology/Myths/TuathaDeDanann/FateofthechildrenofTurenn/Page1.
htm The Fate of the Children of Turenn]
online (accessed 23 October 2007)
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Ecne
In Irish Druids and Old Irish Religions,
James Bonwick reports Ecne as female
and as the goddess of poetry.Bonwick,
James: Irish Druids and Old Irish Religions
(London, Sampson Low, Marston Co,
1894) p. 141
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