S. No.

Name of Features extracted from sessions

Type of Features

Remarks

1

Total Hits

Numeric

Total number of HTTP requests sent by a user in a single session

2

% Image

Numeric

Percentage of Images files Requests (i.e. .jpg, .png, .tiff, .ico, .gif etc.)

3

% HTML

Numeric

Percentage of HTML files Requests (i.e. .html.php, .htm, .js, .cgi etc.)

4

% Binary doc

Numeric

Percentage of Binary Doc files Requests (i.e. .doc, .pdf, .ps, .xls, .ppt etc.)

5

% Binary Exe

Numeric

Percentage of Binary Exe files Requests (i.e. .cgi, .exe, .dll, .dat, .jar etc.)

6

% ASCII

Numeric

Percentage of Ascii files Requests (i.e. .txt, .cpp, .java, .xml, .c etc.)

7

% Zip

Numeric

Percentage of Compressed files Requests (i.e. .zip, .rar, .gzip, .tar, .gz etc.)

8

% Multimedia

Numeric

Percentage of Multimedia files Requests (i.e. .mp3, .mp4, .wmv, .avi, .mpg etc.)

9

% Other File

Numeric

Percentage of Other file format Requests (i.e. .swf, .com, .css etc.)

10

Bandwidth

Numeric

Number of bytes requested from server

11

Session Time

Numeric

Approximated total time of the session in seconds

12

avgHTML Req Time

Numeric

Average Time between two HTML requests

13

Total Night Time Req

Numeric

Total time for request made between 12 am and 7 am

14

total Reapeated Req

Numeric

Fraction of repeated requests

15

% Errors

Numeric

Percentage of Requests with status ≥ 400

16

% GET

Numeric

Percentage of Requests made with GET method

17

% POST

Numeric

Percentage of Requests made with POST method

18

% Other Method

Numeric

Percentage of Requests made with Other methods

19

Depth Of Traversal

Numeric

Depth of traversal

20

Length Of Session

Numeric

Session length

21

Is Robotstxt Visited

Nominal

Indicates whether robots.txt file visited or not

22

% HEAD

Numeric

Percentage of Requests made with HEAD method

23

% Unassigned Referrer

Numeric

Percentage of Requests made with Unassigned Referrer (or Referrer = “−”)