On Wireless:
802.11b vs. 802.11g.
For Internet surfing it does mot matter since Internet broadband connection is slower than 802.11b
For traffic across Internal LAN, 802.11g is significantly faster.
General Wireless info.
802.11b = 11Mb/sec. Network "Speed" (Carrier transmission 2.4GHz)
802.11g = 54Mb/sec. Network "Speed" (Carrier transmission 2.4GHz)
Wireless Ethernet needs additional protocol over head for the transfer. In addition, it is not as stable as Wired so it needs extra processing procedures.
As a result the 11Mb/sec. of the Network chipset is translated to a much lower actual performance.
Usually 4-6Mb/sec.
Few 802.11b hardware units are also capable to work at 22Mb/sec.(usually referred to as b+) it is nice if it works, in real term will yield 20%-40% more than 11Mb/sec. systems.
The 802.11g line that is rated 54Mb/sec. in the real world it yields
18-22Mb/sec.
The differences between the first set of graphs to the second represent the performance differences between 802.11b to 802.11g
Link:
802.11a/b/g SOHO Routers & Access Points: Performance
In comparison a Normal 100Mb/sec. Wired connection (using Windows software tools) would yield 60-80Mb/sec.