The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
Network Working Group A. McKenzie
Request for Comments: 270 BBN
NIC: 7818 January 1, 1972
CORRECTION TO BBN REPORT NO. 1822
In the process of generating RFC #271 we have discovered a set of
errors in BBN Report No. 1822 (NIC 7958). The attached page is a
corrected version of page 25; in addition the first two lines should
be deleted from page 26. The paragraph at the top of page 25 is
changed to show that the Host is NOT marked dead under the stated
conditions, and to show that the timeout period is 30 (rather than
40) seconds. In the footnote, the two changes are underlined; these
changes also show the timeout period as 30 seconds. A more formal
update to Report 1822 will be distributed eventually.
Please note that these changes reflect errors in previous versions of
Report 1822, _not_ changes to the IMP system. The timeout period has
ALWAYS been 30 seconds and the Host was NEVER marked dead under these
[This RFC was put into machine readable form for entry]
[into the online RFC archives by Kelly Tardif, Viagénie 10/99]