There might be requirement from Oracle to check the HTTP server level MLR Patch Set, we can use the below information to get the deatils.

RUN command  "$IAS_ORACLE_HOME/Apache/Apache/bin/httpd -v"


httpd -v
Output:Server version: Oracle HTTP Server Powered by Apache/1.3.19 (Unix)
Server built:   Dec  6 2006 17:56:59 (iAS 1.0.2.2.2 rollup 5)


The meaning of the various rollup are as below

Oracle HTTP Server Patch List

Release
Rollup Version
iAS Patch Number
Applications Interop patch
Patch Included in Rapid Install
1.0.2.2.2
Rollup 5
None
1.0.2.2.2
Rollup 4
11.5.10
1.0.2.2.2
Rollup 3
11.5.9
1.0.2.2.2
Rollup 2
11.5.8
1.0.2.2.2
Rollup 1
11.5.7
1.0.2.1S
Rollup 1
None