Slow Connection Speed With Intel Corporation Centrino Advanced-N 6235

For the netcat LAN speed test, try this instead:

Set up a listening server using

nc -lkv 2222 >/dev/null

At the client laptop do

dd if=/dev/zero bs=1M count=10 | nc -v <server IP address> 2222

and examine the output.

For example, I got the following (both devices connected to my wireless router)

dd if=/dev/zero bs=1M count=10 | nc -v 192.168.1.9 2222
Connection to 192.168.1.9 2222 port [tcp/EtherNet-IP-1] succeeded!
10+0 records in
10+0 records out
10485760 bytes (10 MB) copied, 2.62146 s, 4.0 MB/s

which is of the order I expected.