Automatic discovery of network core type

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels

Reexamination Certificate

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C370S524000, C370S373000, C370S377000, C370S384000, C370S385000, C379S221080, C379S221090, C379S229000

Reexamination Certificate

active

10603038

ABSTRACT:
Systems and methods for automatically discovering the configuration of network and/or communication facilities are provided. The determination generally involves receiving and/or sending at least one test message or packet with special characteristics that normally would be filtered by filtering/forwarding entities in connectionless routed cores, but normally would be forwarded by connectionless communication facilities. If the communication facilities do not contain the filtering/forwarding entity, the at least one test packet will be forwarded or passed through the communication facilities. If the at least one test packet is filtered or not passed, then at least two scenarios are possible. First, the at least one test packet may be filtered and may be silently discarded in which case a determination that the network did not pass the at least one test packet may be made based upon a timeout of a counter. Second, the at least one test packet may be filtered and may cause the generation of error or control messages indicating that the at least one test packet is not a proper packet for the network and/or communication facilities.

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RFC 760: DOD Standard Internet Protocol (Available at ftp://ftp.isi.edu/in-notes/rfc760.txt) V; Jan. 1980; pp. i-iii, 1-42.
RFC 777: Internet Control Message Protocol (Available at ftp://ftp.isi.edu/in-notes/rfc777.txt); Jon Postel; Apr. 1981; pp. 1-14.
RFC 787: Connectionless Data Transmission Survey/Tutorial (Available at ftp://ftp.isi.edu/in-notes/rfc787.txt); A. Lyman Chapin; May 22, 1981; pp. 1-41.
RFC 791: Internet Protocol: DARPA Internet Program Protocol Specification (Available at ftp://ftp.isi.edu/in-notes/rfc791.txt); The Information Sciences Institute of the University of Southern California; Editor: Jon Postel; Sep. 1981; pp. i-iii, 1-45.
RFC 792: Internet Control Message Protocol: DARPA Internet Program Protocol Specification (Available at ftp://ftp.isi.edu/in-notes/rfc792.txt); Jon Postel; Sep. 1981; pp. 1-21.
RFC 874: A Critique of X.25 (Available at ftp://ftp.isi.edu/in-notes/rfc874.txt); M. A. Padlipsky; Sep. 1982; pp. i, 1-13.
RFC 877: A Standard for the Transmission of IP Datagrams Over Public Data Networks (Available at ftp://ftp.isi.edu/in-notes/rfc877.txt); J. T. Korb; Sep. 1983; pp. 1-2.
RFC 894: A Standard for the Transmission of IP Datagrams over Ethernet Networks (Available at ftp://ftp.isi.edu/in-notes/rfc894.txt); Charles Hornig; Apr. 1984; pp. 1-3.
RFC 895: A Standard for the Transmission of IP Datagrams over Experimental Ethernet Networks (Available at ftp://ftp.isi.edu/in-notes/rfc895.txt); Jon Postel; Apr. 1984; pp. 1-3.
RFC 948: Two Methods for the Transmission of IP Datagrams over IEEE 802.3 Networks (Available at ftp://ftp.isi.edu/in-notes/rfc948.txt); Ira Winston; Jun. 1985; pp. 0-5.
RFC 950: Internet Standard Subnetting Procedure (Available at ftp://ftp.isi.edu/in-notes/rfc950.txt); J. Mogul and Jon Postel; Aug. 1985; pp. 1-18.
RFC 1009: Requirements for Internet Gateways (Available at ftp://ftp.isi.edu/in-notes/rfc1009.txt); Robert Braden and Jon Postel; Jun. 1987; pp. 1-55.
RFC 1042: A Standard for the Transmission of IP Datagrams over IEEE 802 Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1042.txt); Jon Postel and J. Reynolds; Feb. 1988; pp. 1-15.
RFC 1051: A Standard for the Transmission of IP Datagrams and ARP Packets over ARCNET Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1051.txt); P. Prindeville; Mar. 1988; pp. 1-4.
RFC 1053; Telnet X.3 PAD Option (Available at ftp://ftp.isi.edu/in-notes/rfc1053.txt); S. Levy and T. Jacobson; Apr. 1988; pp. 1-21.
RFC 1055: A Nonstandard for Transmission of IP Datagrams Over Serial Lines: SLIP (Available at ftp://ftp.isi.edu/in-notes/rfc1055.txt); J. Romkey; Jun. 1988; pp. 1-6.
RFC 1086 ISO-TPO bridge between TCP and X.25 (Available at ftp://ftp.isi.edu/in-notes/rfc1086.txt); Julian P. Onions and Marshall Rose; Dec. 1988; pp. 1-9.
RFC 1088: A Standard for the Transmission of IP Datagrams over NetBIOS Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1088.txt); Leo J. McLaughlin III; Feb. 1989; pp. 1-3.
RFC 1090: SMTP on X.25 (Available at ftp://ftp.isi.edu/in-notes/rfc1090.txt); Robert Ullmann; Feb. 1989; pp. 1-4.
RFC 1103: A Proposed Standard for the Transmission of IP Datagrams over FDDI Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1103.txt); Dave Katz; Jun. 1989; pp. 1-9.
RFC 1122: Requirements for Internet Hosts—Communication Layers (Available at ftp://ftp.isi.edu/in-notes/rfc1122.txt); The Internet Engineering Task Force; Editor: Robert Braden; Oct. 1989; pp. 1-116.
RFC 1134: The Point-to-Point Protocol: A Proposal for Multi-Protocol Transmission of Datagrams Over Point-to-Point Links (Available at ftp://ftp.isi.edu/in-notes/rfc1134.txt); Drew D. Perkins; Nov. 1989; pp. 1-38.
RFC 1171: The Point-to-Point Protocol for the Transmission of Multi-Protocol Datagrams Over Point-to-Point Links (Available at ftp://ftp.isi.edu/in-notes/rfc1171.txt); Drew D. Perkins; Jul. 1990; pp. 1-48.
RFC 1172: The Point-to-Point Protocol (PPP) Initial Configuration Options (Available at ftp://ftp.isi.edu/in-notes/rfc1172.txt); Drew D. Perkins and Russ Hobby; Jul. 1990; pp. 1-38.
RFC 1188: A Proposed Standard for the Transmission of IP Datagrams over FDDI Networks (Available at ftp://ftp.isi.edu/in-notes/ftp1188.txt); Dave Katz; Oct. 1990; pp. 1-11.
RFC 1201: Transmitting IP Traffic over ARCNET Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1201.txt); Don Provan; Feb. 1991; pp. 1-7.
RFC 1209: The Transmission of IP Datagrams over the SMDS Service (Available at ftp://ftp.isi.edu/in-notes/rfc1209.txt); Dave Piscitello and Joseph Lawrence; Mar. 1991; pp. 1-11.
RFC 1220: Point-to-Point Protocol Extensions for Bridging (Available at ftp://frp.isi.edu/in-notes/rfc1220.txt); Fred Baker; Apr. 1991; pp. 1-18.
RFC 1226: Internet Protocol Encapsulation of AX.25 Frames (Available at ftp://ftp.isi.edu/in-notes/rfc1226.txt); Brian Kantor; May 1991; pp. 1-2.
RFC 1234: Tunneling IPX Traffic through IP Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1234.txt); Don Provan; Jun. 1991; pp. 1-6.
RFC 1241: A Scheme for an Internet Encapsulation Protocol: Version 1 (Available at ftp://ftp.isi.edu/in-notes/rfc1241.txt); Robert A. Woodburn and David L. Mills; Jul. 1991; pp. 1-17.
RFC 1242: Benchmarking Terminology for Network Interconnection Devices (Available at ftp://ftp.isi.edu/in-notes/rfc1242.txt); Scott Bradner, Editor; Jul. 1991 pp. 1-12.
RFC 1256: ICMP Router Discovery Messages (Available at ftp://ftp.isi.edu/in-notes/rfc1256.txt); Stephen E. Deering, Editor; Sep. 1991; pp. 1-19.
RFC 1293: Inverse Address Resolution Protocol (Available at ftp://ftp.isi.edu/in-notes/rfc1293.txt); Terry Bradley and Caralyn Brown; Jan. 1992; pp. 1-6.
RFC 1294: Multiprotocol Interconnect over Frame Relay (Available at ftp://ftp.isi.edu/in-notes/rfc1294.txt); Terry Bradley, Caralyn Brown, and Andrew G. Malis; Jan. 1992; pp. 1-28.
RFC 1326: Mutual Encapsulation Considered Dangerous (Available at ftp://ftp.isi.edu/in-notes/rfc1326.txt);Paul Tsuchiya; May 1992; pp. 1-5.
RFC 1329: Thoughts on Address Resolution for Dual MAC FDDI Networks (Available at ftp://ftp.isi.edu/in-notes/rfc1329.txt); Peter Kuehn; May 1992; pp. 1-28.
RFC 1331: The Point-to-Point Protocol (PPP) for the Transmission of Multi-protocol Datagrams over Point-to-Point Links (Available at ftp://ftp.isi.edu/in-notes/rfc1331.txt);William Allen Simpson; May 1992; pp. 1-66.
RFC 1332: The PPP Internet Protocol Control Protocol (IPCP) (Available at ftp://ftp.isi.edu/in-notes/rfc1332.txt); Glenn McGregor; May 1992; pp. 1-12.
RFC 1333: PPP Link Quality Monitoring (Available at ftp://ftp.isi.edu/in-notes/rfc1333.txt

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