diff --git a/chapter/dns.tex b/chapter/dns.tex
new file mode 100644
index 0000000..e69de29
diff --git a/main.tex b/main.tex
index d588308..7b3b59e 100644
--- a/main.tex
+++ b/main.tex
@@ -29,6 +29,7 @@
 \include{chapter/layer3}
 \include{chapter/dhcp}
 \include{chapter/ntp}
+\include{chapter/dns}
 \include{chapter/mgmt}
 \include{chapter/internet}
 \include{chapter/wireless}