diff --git a/src/content/blog/data-communications-and-networking-chapter-4-lans-part1.md b/src/content/blog/data-communications-and-networking-chapter-4-lans-part1.md
index 99aa535dd..ba619720b 100644
--- a/src/content/blog/data-communications-and-networking-chapter-4-lans-part1.md
+++ b/src/content/blog/data-communications-and-networking-chapter-4-lans-part1.md
@@ -27,5 +27,6 @@ ISO에서는 또한 이걸 **ISO 8802** 표준으로 승인.
 ![](/src/assets/image/data-communications-and-networking-chapter-4-lans-part1-1696173798651.jpeg)
 
 ![](/src/assets/image/data-communications-and-networking-chapter-4-lans-part1-1696173925385.jpeg)
+Ethernet MAC은 CSMA/CD를 사용한다.
 
 ## 4.2