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, R. Scott Murray, 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 2, 2006 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:	August 11, 2006	By:	/s/ R. Scott Murray
		Name: R. Scott Murray
		Title: President and Chief
		Executive Officer

I, Donald M. Halsted, III, 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 2, 2006 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:	August 11, 2006	By:	/s/ Donald M. Halsted, III
		Name: Donald M. Halsted, III
		Title: Executive Vice President,
		Finance and Chief Financial
		Officer