Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Speed of light measurement using ping   We report on a very simple and inexpensive method for determining the speed
of an electrical wave in a transmission line. The method consists of analyzing
the roundtrip time for ethernet packets between two computers. It involves
minimal construction, straightforward mathematics and displays the usefulness
of stochastic resonance in signal recovery. Using basic electrical properties
of category-five cable students may use their measurements to determine the
speed of light in the vacuum to within a few percent.

32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con