A web developer has created a custom HTTP call to a backend application. The HTTP headers being sent by the HTTP call are:
```
GET / HTTP/1.1
User-Agent: MyCustomApp (v1.0)
Accept: text/html
Cache-Control: no-cache
Connection: keep-alive
Cookie: somecookie=1
```
The backend server is responding with the following:
```
HTTP/1.1 400 Bad Request
Date: Wed, 20 Jul 2012 17:22:41 GMT
Connection: close
```
Why is the HTTP web server responding with a HTTP 400 Bad Request?

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Accepted Answer

A. The client request does NOT include a Host header.

Answer

B. The User-Agent header contains an invalid character.

Answer

C. The web server is NOT expecting a keep-alive connection.

Answer

D. The web server is configured to accept HTTP 1.0 requests only.

A web developer has created a custom HTTP call to a backend application. The HTTP headers being sent by the HTTP call are: `` GET / HTTP/1.1 User-Agent: MyCustomApp (v1.0) Accept: text/html…

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