Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Trivial File Transfer Protocol
Table title:
IETF standards documentation
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > RFC Number </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Published </th><th colspan=1 rowspan=1 > Author </th><th colspan=1 rowspan=1 > Obsolete and Update Information </th></tr>
<tr> <td colspan=1 rowspan=1 > RFC 783 </td><td colspan=1 rowspan=1 > The TFTP Protocol (Revision 1) </td><td colspan=1 rowspan=1 > June 1981 </td><td colspan=1 rowspan=1 > K. Sollins </td><td colspan=1 rowspan=1 > Obsoleted by - RFC 1350 </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 906 </td><td colspan=1 rowspan=1 > Bootstrap Loading using TFTP </td><td colspan=1 rowspan=1 > June 1984 </td><td colspan=1 rowspan=1 > Ross Finlayson </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 951 </td><td colspan=1 rowspan=1 > Bootstrap Protocol </td><td colspan=1 rowspan=1 > Sep.1985 </td><td colspan=1 rowspan=1 > Bill Croft </td><td colspan=1 rowspan=1 > Updated by RFC 1395, RFC 1497, RFC 1532, RFC 1542, RFC 5494 </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 1350 </td><td colspan=1 rowspan=1 > The TFTP Protocol (Revision 2) </td><td colspan=1 rowspan=1 > July 1992 </td><td colspan=1 rowspan=1 > K. Sollins </td><td colspan=1 rowspan=1 > Updated by RFC 1782, RFC 1783, RFC 1784, RFC 1785, RFC 2347, RFC 2348, RFC 2349 </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 1782 </td><td colspan=1 rowspan=1 > TFTP Option Extension </td><td colspan=1 rowspan=1 > March 1995 </td><td colspan=1 rowspan=1 > G. Malkin </td><td colspan=1 rowspan=1 > Obsoleted by - RFC 2347 </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 2131 </td><td colspan=1 rowspan=1 > Dynamic Host Configuration Protocol </td><td colspan=1 rowspan=1 > March 1997 </td><td colspan=1 rowspan=1 > R. Droms </td><td colspan=1 rowspan=1 > Updated by RFC 3396, RFC 4361, RFC 5494, RFC 6842 </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 2347 </td><td colspan=1 rowspan=1 > TFTP Option Extension </td><td colspan=1 rowspan=1 > May 1998 </td><td colspan=1 rowspan=1 > G. Malkin </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 2348 </td><td colspan=1 rowspan=1 > TFTP Blocksize Option </td><td colspan=1 rowspan=1 > May 1998 </td><td colspan=1 rowspan=1 > G. Malkin </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 2349 </td><td colspan=1 rowspan=1 > TFTP Timeout Interval and Transfer Size Options </td><td colspan=1 rowspan=1 > May 1998 </td><td colspan=1 rowspan=1 > G. Malkin </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > RFC 5505 </td><td colspan=1 rowspan=1 > Principles of Internet Host Configuration </td><td colspan=1 rowspan=1 > May 2009 </td><td colspan=1 rowspan=1 > B. Aboba </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > RFC 7440 </td><td class="highlighted"  colspan=1 rowspan=1 > TFTP Windowsize Option </td><td class="highlighted"  colspan=1 rowspan=1 > Jan 2015 </td><td colspan=1 rowspan=1 > P. Masotta </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Was is the latest IETF standards documentation and when was it released?
Answer:
The TFTP Windowsize Option (RFC 7440) was published in January 2015.