User Agent l� m?t "chu?i" nh?n d?ng khi tr?nh duy?t g?i y�u c?u �?n m�y ch? web. Khi tr?nh duy?t c?a b?n truy c?p trang web n�o ��, tr?nh duy?t s? g?i m?t HTTP Request bao g?m User Agent �?n m�y ch? web. N?i dung c?a User Agent tu? thu?c v�o tr?nh duy?t m� ch�ng ta s? d?ng. M?i tr?nh
duy?t �?u c� ri�ng cho m?nh m�t User Agent nh?t �?nh. Th?c ch?t, User Agent l� c�ch �? tr?nh duy?t n�i "Ch�o, t�i l� Firefox tr�n Windows" ho?c "Ch�o, t�i l� Google Chrome tr�n Windows".
D?a v�o User Agent th? m�y ch? web c� th? bi?t ch�ng ta d�ng tr?nh duy?t web g?. M�y ch? web c� th? d�ng th�ng tin n�y �? ph?c v? tr?nh duy?t web kh�c nhau. Ch?ng h?n nh�, website c� th? g?i trang d�nh ri�ng cho tr?nh duy?t tr�n �i?n tho?i ho?c l� c�c trang d�nh ri�ng cho laptop, desktop, trang hi?n �?i d�nh cho tr?nh duy?t m?i nh?t, v� c� th? l� /"Please upgrade your browser."/ n?u tr?nh duy?t c?a b?n qu� l?i th?i.
��y l� m?t chu?i User Agent c?a Opera ch?y tr�n Windows XP:
�o?n User Agent tr�n cho m�y ch? web bi?t r?ng: h? �i?u h�nh ta �ang
d�ng l� /Windows XP (Windows NT 5.1)/ v� tr?nh duy?t n�y l� /Opera/
phi�n b?n /12.00/.
��y l� m?t chu?i User Agent c?a Firefox ch?y tr�n Windows XP:
T��ng t? nh� tr�n, �o?n User Agent n�y b�o cho m�y ch? web r?ng: h? �i?u h�nh ta �ang d�ng l� /Windows XP (Windows NT 5.1)/ v� tr?nh duy?t n�y l� /Mozilla Firefox/ phi�n b?n /18.0/.
V� ��y l� m?t chu?i User Agent kh�c c?a Firefox ch?y tr�n Windows 7:
Mozilla/5.0 (Windows NT 6.1; rv:18.0) Gecko/20100101 Firefox/18.0
�? ki?m tra User Agent tr�n tr?nh duy?t c?a m?nh b?n c� th? v�o trang web: http://www.whatsmyuseragent.com
��?c ��ng b?i lqv5453
duy?t �?u c� ri�ng cho m?nh m�t User Agent nh?t �?nh. Th?c ch?t, User Agent l� c�ch �? tr?nh duy?t n�i "Ch�o, t�i l� Firefox tr�n Windows" ho?c "Ch�o, t�i l� Google Chrome tr�n Windows".
D?a v�o User Agent th? m�y ch? web c� th? bi?t ch�ng ta d�ng tr?nh duy?t web g?. M�y ch? web c� th? d�ng th�ng tin n�y �? ph?c v? tr?nh duy?t web kh�c nhau. Ch?ng h?n nh�, website c� th? g?i trang d�nh ri�ng cho tr?nh duy?t tr�n �i?n tho?i ho?c l� c�c trang d�nh ri�ng cho laptop, desktop, trang hi?n �?i d�nh cho tr?nh duy?t m?i nh?t, v� c� th? l� /"Please upgrade your browser."/ n?u tr?nh duy?t c?a b?n qu� l?i th?i.
��y l� m?t chu?i User Agent c?a Opera ch?y tr�n Windows XP:
�o?n User Agent tr�n cho m�y ch? web bi?t r?ng: h? �i?u h�nh ta �ang
d�ng l� /Windows XP (Windows NT 5.1)/ v� tr?nh duy?t n�y l� /Opera/
phi�n b?n /12.00/.
��y l� m?t chu?i User Agent c?a Firefox ch?y tr�n Windows XP:
T��ng t? nh� tr�n, �o?n User Agent n�y b�o cho m�y ch? web r?ng: h? �i?u h�nh ta �ang d�ng l� /Windows XP (Windows NT 5.1)/ v� tr?nh duy?t n�y l� /Mozilla Firefox/ phi�n b?n /18.0/.
V� ��y l� m?t chu?i User Agent kh�c c?a Firefox ch?y tr�n Windows 7:
Mozilla/5.0 (Windows NT 6.1; rv:18.0) Gecko/20100101 Firefox/18.0
�? ki?m tra User Agent tr�n tr?nh duy?t c?a m?nh b?n c� th? v�o trang web: http://www.whatsmyuseragent.com
��?c ��ng b?i lqv5453
Chap 20 - Nh?ng ki?n th?c c� b?n �? tr? th�nh hacker : User agent
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Oleh
Unknown
