What is a User Agent String?
17460
Created On 01/24/23 22:46 PM - Last Modified 06/20/23 19:51 PM
Question
What is a User Agent String?
Answer
The information that makes up the application identifier is called the User Agent String. The UA (User Agent) is a field in the HTTP request header. The request header is sent in the initial GET request and the User Agent field is often used to determine the capabilities or limitations of the application.
In addition to identifying the browser or application being used, the user agent strings sent by popular browsers usually include information about the host operating system.
Certain sites use the user agent string to respond with or render a particular version of their site.
Malware also uses user agent spoofing to avoid detection
Additional Information
Additional information can be found in RFC 2616 Section 14.43.