diff --git a/FINAL/R4.txt b/FINAL/R4.txt
index e087f77..25f1bf8 100644
--- a/FINAL/R4.txt
+++ b/FINAL/R4.txt
@@ -40,5 +40,6 @@ exit
 router ospf 1
 network 10.0.20.0 0.0.0.7 area 0 
 network 172.16.12.0 0.0.0.3 area 1
+passive-interface g0/0
 end
 copy running-config startup-config
\ No newline at end of file