diff --git a/Days/day21.md b/Days/day21.md
index de19cd8..5423ede 100644
--- a/Days/day21.md
+++ b/Days/day21.md
@@ -57,7 +57,7 @@ A logical group of hosts which require similar connectivity.
 
 **Router** facilitate communication between networks. If we said before that a switch looks after communication within a network a router allows us to join these networks together or at least give them access to each other if permitted. 
 
-A router can provide a traffic contol point (security, filtering, redirting) More and more switches also provide some of these functions now. 
+A router can provide a traffic contol point (security, filtering, redirecting) More and more switches also provide some of these functions now. 
 
 Routers learn which networks they are attached to. This is known as routes, a routing table is all the networks a router knows about.