**********************************************************************
Defense Data Network
MANAGEMENT BULLETIN
The DDN MANAGEMENT BULLETIN is published by the Network Information
Center under DCA contract as a means of communicating official policy,
procedures and other information of concern to management personnel at
DDN facilities. Back issues may be obtained by FTP from the directory
<DDN-NEWS> at SRI-NIC [26.0.0.73 and 10.0.0.51].
**********************************************************************
DOMAIN NAMES TRANSITION
This memo is intended to remind all host personnel that at 0800 EST on
March 21, 1984 every host on the MILNET/ARPANET will acquire a new
official host name in accordance with RFC 897, the "Domain Name System
Implementation Schedule". Briefly, all existing official names will
become nicknames, and the new official name will be formed by adding
the domain name ".ARPA" to the old official name. Special attention
should be paid to the possible problems that your site software may
encounter with the new names.
For example, the old entry for USC-ISIF is:
HOST : 10.2.0.52 : USC-ISIF,ISIF : DEC-1090T : TOPS20 :
TCP/TELNET,TCP/SMTP,TCP/FTP,TCP/FINGER,UDP/TFTP :
The new entry will be:
HOST : 10.2.0.52 : USC-ISIF.ARPA,USC-ISIF,ISIF : DEC-1090T : TOPS20
: TCP/TELNET,TCP/SMTP,TCP/FTP,TCP/FINGER,UDP/TFTP :
For some hosts and programs this will cause no disruptions, but for
others some problems may arise. For example, with over five hundred
entries in the table, the addition of 500 names could exceed the space
allocated to store the table in some programs. Another possible
problem is that period (or dot, ".") is not now a legal character in
host names, and some programs may not be able to parse these new
names.
An experimental domain-style name table has been available in parallel
with the regular table for several months on the SRI-NIC machine, as
<NETINFO>DHOSTS.TXT. No new domains are being introduced during the
changeover. There will be only one top-level domain to begin with,
and that is ".ARPA". Other top-level domain names such as ".DDN",
will be announced at a later date. The revised table simply appends a
domain name to each of the official host names included in the ARPA
domain. Thus, programs can be constructed to deal with domain style
names in a general way, without requiring any special programming to
add or delete the string ".ARPA" to or from host names.
The introduction of new domains is tied to the provision of domain
servers by those domains. As new domains meet the requirements and
are authorized, the domain names will also be included in the NIC host
table.
Eventually, the Internet will become too complex and will change too
rapidly to keep a master table of all the hosts. The future plan is
to simplify the master table by reducing it to entries for the domain
names only. By the time this happens, all normal translation of host
names into addresses across domains should take place by consulting
the appropriate domain servers.
DDN subscribers (including MILNET subscribers) are not required to
implement Domain Name servers or protocols until a DDN Domain Names
schedule is published, which will not be prior to Oct 1984. MILNET
subscribers who choose to participate in the DARPA Internet on a
voluntary basis are free to do so, and may implement Domain Names
according to the Internet Schedule. The NIC will continue to maintain
a complete host table of DDN subscribers until the (as yet
unscheduled) complete transition of DDN subscribers to the Domain
Names approach takes place.
Please see RFC 881 [2] and RFC 897 [3] for further discussion of the
Internet schedule, and RFC 882 [4] and RFC 883 [5] for information on
the design and implementation of the domain style name service.
References:
[1] Harrenstien, K., V. White, and E. Feinler, "Hostnames Server"
RFC 811, Network Information Center, SRI International, March
1982.
[2] Postel, J., "The Domain Names Plan and Schedule", RFC 881, USC
Information Sciences Institute, November 1983.
[3] Postel, J., "Domain Name System Implementation Schedule", RFC 897,
USC Information Sciences Institute, February 1984.
[4] Mockapetris, P., "Domain Names - Concepts and Facilities",
RFC 882, USC Information Sciences Institute, November 1983.
[5] Mockapetris, P., "Domain Names - Implementation and
Specification", RFC 883, USC Information Sciences Institute,
November 1983.
Defense Data Network
MANAGEMENT BULLETIN
The DDN MANAGEMENT BULLETIN is published by the Network Information
Center under DCA contract as a means of communicating official policy,
procedures and other information of concern to management personnel at
DDN facilities. Back issues may be obtained by FTP from the directory
<DDN-NEWS> at SRI-NIC [26.0.0.73 and 10.0.0.51].
**********************************************************************
DOMAIN NAMES TRANSITION
This memo is intended to remind all host personnel that at 0800 EST on
March 21, 1984 every host on the MILNET/ARPANET will acquire a new
official host name in accordance with RFC 897, the "Domain Name System
Implementation Schedule". Briefly, all existing official names will
become nicknames, and the new official name will be formed by adding
the domain name ".ARPA" to the old official name. Special attention
should be paid to the possible problems that your site software may
encounter with the new names.
For example, the old entry for USC-ISIF is:
HOST : 10.2.0.52 : USC-ISIF,ISIF : DEC-1090T : TOPS20 :
TCP/TELNET,TCP/SMTP,TCP/FTP,TCP/FINGER,UDP/TFTP :
The new entry will be:
HOST : 10.2.0.52 : USC-ISIF.ARPA,USC-ISIF,ISIF : DEC-1090T : TOPS20
: TCP/TELNET,TCP/SMTP,TCP/FTP,TCP/FINGER,UDP/TFTP :
For some hosts and programs this will cause no disruptions, but for
others some problems may arise. For example, with over five hundred
entries in the table, the addition of 500 names could exceed the space
allocated to store the table in some programs. Another possible
problem is that period (or dot, ".") is not now a legal character in
host names, and some programs may not be able to parse these new
names.
An experimental domain-style name table has been available in parallel
with the regular table for several months on the SRI-NIC machine, as
<NETINFO>DHOSTS.TXT. No new domains are being introduced during the
changeover. There will be only one top-level domain to begin with,
and that is ".ARPA". Other top-level domain names such as ".DDN",
will be announced at a later date. The revised table simply appends a
domain name to each of the official host names included in the ARPA
domain. Thus, programs can be constructed to deal with domain style
names in a general way, without requiring any special programming to
add or delete the string ".ARPA" to or from host names.
The introduction of new domains is tied to the provision of domain
servers by those domains. As new domains meet the requirements and
are authorized, the domain names will also be included in the NIC host
table.
Eventually, the Internet will become too complex and will change too
rapidly to keep a master table of all the hosts. The future plan is
to simplify the master table by reducing it to entries for the domain
names only. By the time this happens, all normal translation of host
names into addresses across domains should take place by consulting
the appropriate domain servers.
DDN subscribers (including MILNET subscribers) are not required to
implement Domain Name servers or protocols until a DDN Domain Names
schedule is published, which will not be prior to Oct 1984. MILNET
subscribers who choose to participate in the DARPA Internet on a
voluntary basis are free to do so, and may implement Domain Names
according to the Internet Schedule. The NIC will continue to maintain
a complete host table of DDN subscribers until the (as yet
unscheduled) complete transition of DDN subscribers to the Domain
Names approach takes place.
Please see RFC 881 [2] and RFC 897 [3] for further discussion of the
Internet schedule, and RFC 882 [4] and RFC 883 [5] for information on
the design and implementation of the domain style name service.
References:
[1] Harrenstien, K., V. White, and E. Feinler, "Hostnames Server"
RFC 811, Network Information Center, SRI International, March
1982.
[2] Postel, J., "The Domain Names Plan and Schedule", RFC 881, USC
Information Sciences Institute, November 1983.
[3] Postel, J., "Domain Name System Implementation Schedule", RFC 897,
USC Information Sciences Institute, February 1984.
[4] Mockapetris, P., "Domain Names - Concepts and Facilities",
RFC 882, USC Information Sciences Institute, November 1983.
[5] Mockapetris, P., "Domain Names - Implementation and
Specification", RFC 883, USC Information Sciences Institute,
November 1983.
đồng tâm
ReplyDeletegame mu
cho thuê nhà trọ
cho thuê phòng trọ
nhac san cuc manh
số điện thoại tư vấn pháp luật miễn phí
văn phòng luật
tổng đài tư vấn pháp luật
dịch vụ thành lập công ty trọn gói
Đệ Ngũ Khinh Nhu thấy Cảnh Mộng Hồn còn muốn nói thêm thì liền phất tay chặn lại bảo:
“Chuyện này Tứ Vương Toạ không có khả năng đi! Hắn cùng Âm Vô Pháp chính là anh em ruột, nếu hắn đi thì chỉ làm sự tình thêm huyên náo hơn mà thôi. Chỉ do hiểu lầm nên đã dẫn đến lưỡng bại câu thương, nếu hai bên còn có thể nói chuyện với nhau thì sự tình chắc chắn còn thể hóa thù thành bạn được. Nhưng nếu lại náo loạn một hồi nữa thì mọi chuyện không thể cứu vãn được đâu!
Cảnh Mộng Hồn thở dài. Tứ Vương Toạ Âm Vô Thiên sau khi nghe tin đã tìm hắn quậy một trận. Như thế nào hắn cũng muốn đích thân đi cứu huynh trưởng, càng là muốn giết chết thằng Sở Diêm Vương kia để báo thù. Nhưng có Đệ Ngũ Khinh Nhu ở đây, hắn căn bản còn chưa nói ra miệng liền đã bỏ đi suy nghĩ này.
“ Lần này tiến đến ngoài điều tra và cứu người ra, chúng ta còn phải cùng vị Vương Toạ kia giải thích rõ ràng hiểu lầm này!” Đệ Ngũ Khinh Nhu chầm chậm nói tiếp: “Mặc dù chỉ là suy đoán nhưng bổn toạ cảm thấy nó không sai. Vì thế nên nhất định phải phái đi một người lão luyện, Nhị Vương Toạ chính là người thích hợp nhất!” Đệ Ngũ Khinh Nhu quay đầu nhìn ba người Hàn Bố Sở bảo: “Kế hoạch lần này có thế nói là kế hoạch lớn nhất, phải có người khống chế toàn cục mới xong. Trong hai người các vị, ai muốn đi thử một phen nào?” Hắn nhìn ba người nhưng chỉ nói “ hai người các ngươi” rõ ràng là đã đem Cao Thăng loại trừ ra ngoài.
“ Tướng gia, để tôi đi…” Cao Thăng còn chưa nói hết đã bị Đệ Ngũ Khinh Ngu chặn lời, bảo: “Cao Thăng, ngươi không thể đi được! Nếu ngươi đi thì các đồng bạn của ngươi sẽ không đi sao?”
Rồi hắn nặng nề nói tiếp: “ Các vị chính là những con át chủ bài mà ta có được, không thể dùng khinh suất như thế! Hơn nữa nếu là ngươi đi, nhỡ một khi hành động bị bại lộ thì đám gia tộc đối đầu của ngươi sẽ lập tức gia nhập trận doanh của Thiết Bổ Thiên. Điều này quả thật là hết sức bất lợi đối với ta!”