Comparison Chart
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Approx. release date AirPort Extreme Model Wi-Fi standard Gigabit ports Guest network feature Radio Type MIMO configuration IPv6 router mode* ?? M8799LL/A A1034 ('Round') 802.11b/g No No Single band 2.4 GHz ?? No January 9, 2007 MA073LL/A A1143 ('1st Generation', previously 'Fast Ethernet') 802.11a/b/g/Draft N No No Single 2.4 GHz or 5 GHz 3x3:2 No August 7, 2007 MB053LL/A A1143 ('2nd Generation', previously 'Gigabit Ethernet') 802.11a/b/g/Draft N Yes No Single 2.4 GHz or 5 GHz 3x3:2 No March 3, 2009 MB763LL/A A1301 ('3rd Generation', previously 'Simultaneous Dual-Band') 802.11a/b/g/Draft N Yes Yes Simultaneous 2.4 GHz and 5 GHz 2x2:2 (in each band) No October 20, 2009 MC340LL/A A1354 ('4th Generation', previously 'Simultaneous Dual-Band II') 802.11a/b/g/Final N Yes Yes Simultaneous 2.4 GHz and 5 GHz 3x3:3 (in each band) Yes (does not work over PPPoE). June 21, 2011 MD031LL/A A1408 ('5th Generation') 802.11a/b/g/Final N Yes Yes Simultaneous 2.4 GHz and 5 GHz 3x3:3 (in each band) Yes (does not work over PPPoE).
*All models support IPv6 tunnel mode.
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