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RFC_00000791_Internet_Protocol_v4
RFC_00001034_Domain_Names_Concepts_and_Facilities
RFC_00001035_Domain_Names_Implementation_and_Specification
RFC_00002821_SMTP.html
RFC_00003501_IMAP_v4rev1.html
RFC_00003986_URI_2005
RFC_00004122_GUID_spec.txt