Technical Information

Apple TV Hard Drive Upgrade

External drive mount points on OS X

Time Machine backup to disk image

Drobo

Read HFS+ on Windows (HFSExplorer)

Geodesy

Cisco IOS image naming conventions

Cisco router module HWIC-CABLE-D-2

Radio Frequencies

Networking Tools

Broadband test with queue sizing Java Tweak Tool

Find MTU size (add 28 to result to get maximum MTU value):

Windows: ping -f -l 1472 www.google.com
Mac: ping -D -s 1472 www.google.com
Linux: ping -s 1472 www.google.com

Set RWIN size in OS X(lost after reboot):

sudo sysctl -w net.inet.tcp.recvspace=RWIN

1.5 x avg ping time (in ms) x d/l speed (in kB/sec)

Stop delaying packed acks (lost after reboot, else see /etc/sysctl.conf):

sudo sysctl -w net.inet.tcp.delayed_ack=0

0-disabled; 1=enabled; 2=more compatible (TH_PUSH); 3=streaming detection