This data from a program that regularly pings each of the 1022 hosts in 192.35.164.0/22 (the NANOG hotel netowrk). The primary goal is to discover how many people are using DHCP vs Static, and Wired vs Wireless. Its likely that some people have configured their laptops to deny incoming ICMP, so they won't be counted.

Some of the graphs have time on the x-axis. ``Time zero'' is midnight on saturday night/sunday morning.

Fig 1: The red dots represent individual ICMP replies. The green line is the median RTT over a 10-minute sliding window.

Fig 2: Each point on the plot is an ICMP echo reply. The different colors show which pool a host's address belongs to.

Fig 3: This figure also has one point for each ICMP echo reply. It shows when hosts come and go. The always-on hosts in the DHCP pool are probably the 15 or so boxes in the terminal room.

Fig 4: This plot shows how many hosts are alive on the network within 20-minute sliding window.