Security Marking

configname: CONFIG_NETWORK_SECMARK

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Security Marking
In linux kernel since version 2.6.18 (release Date: 2006-09-19)  
This enables security marking of network packets, similar
to nfmark, but designated for security purposes.
If you are unsure how to answer this question, answer N.

depends
CONFIG_NET

is depended by
CONFIG_SECURITY_SELINUX