What effect does `static` have on a method in a namespace?

Does static mean anything on func2 in the context of a namespace? Both methods appear to be equivalent.

// MyHeader.h
namespace TestNameSpace
{
    int func1() { return 1; }
    static int func2() { return 2; }
}

// SomeFile.cpp
#include "MyHeader.h"
// ...
int test1 = TestNameSpace::func1(); // 1
int test2 = TestNameSpace::func2(); // 2

>Solution :

static functions (which are not member of classes) are only visible in the compilation unit they are defined in. Apart from that there should not be any difference between those two