diff --git a/data/module-1/part-1/9-internet.md b/data/module-1/part-1/9-internet.md
index c91f800..e9da74f 100644
--- a/data/module-1/part-1/9-internet.md
+++ b/data/module-1/part-1/9-internet.md
@@ -18,7 +18,7 @@ in 4 layers.
 4. Application layer
 
 Protocols at the link layer are responsible for direct communication between
-two entities over the same link, for example, a protocol responsible
+two entities over the same link, for example, a protocol responsible for
 communication between a laptop and a WiFi-router establishes the 
 frequency, as well as how bits are transferred over that frequency. On the
 other extreme, the protocols in the application layer establish common language between