Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Edgar Masri, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of 3Com Corporation on Form 10-K for the fiscal year ended June 1, 2007 fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of 3Com Corporation.

Date: July 31, 2007	By:	/s/ EDGAR MASRI
		Name:	Edgar Masri
		Title:	President and Chief Executive Officer

I, Jay Zager, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of 3Com Corporation on Form 10-K for the fiscal year ended June 1, 2007 fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of 3Com Corporation.

Date: July 31, 2007	By:	/s/ JAY ZAGER
		Name:	Jay Zager
		Title:	Executive Vice President, Finance and Chief Financial Officer