Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Architecture of Network and Client-Server model   With the development of Internet technology, the Web is becoming more and
more important in our lives so that it has even become an essential element.
The application of the Web has never been limited to computers; it has been
opened to all kinds of intelligent digital devices like mobile ones. In this
paper, we discuss the main and substantial difference between UDP and TCP, and
how to implement Client-Server model. We also discuss the efficiency of
multi-thread server and its relationship with internet.

32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat