diff --git a/core-java-modules/core-java-networking-3/README.md b/core-java-modules/core-java-networking-3/README.md
index 80782645dd..14665080a7 100644
--- a/core-java-modules/core-java-networking-3/README.md
+++ b/core-java-modules/core-java-networking-3/README.md
@@ -14,5 +14,4 @@ This module contains articles about networking in Java
 - [Get Domain Name From Given URL in Java](https://www.baeldung.com/java-domain-name-from-url)
 - [Java HttpClient Timeout](https://www.baeldung.com/java-httpclient-timeout)
 - [Port Scanning With Java](https://www.baeldung.com/java-port-scanning)
-- [Validating URL in Java](https://www.baeldung.com/java-validate-url)
 - [[<-- Prev]](/core-java-modules/core-java-networking-2)
diff --git a/core-java-modules/core-java-networking-4/README.md b/core-java-modules/core-java-networking-4/README.md
index 355f0c447e..5f0958fae0 100644
--- a/core-java-modules/core-java-networking-4/README.md
+++ b/core-java-modules/core-java-networking-4/README.md
@@ -1,2 +1,3 @@
 ## Relevant Articles:
 - [Difference Between URI.create() and new URI()](https://www.baeldung.com/java-uri-create-and-new-uri)
+- [Validating URL in Java](https://www.baeldung.com/java-validate-url)
\ No newline at end of file
diff --git a/core-java-modules/core-java-networking-4/pom.xml b/core-java-modules/core-java-networking-4/pom.xml
index 6c8b3103f9..29531a5767 100644
--- a/core-java-modules/core-java-networking-4/pom.xml
+++ b/core-java-modules/core-java-networking-4/pom.xml
@@ -13,8 +13,21 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/commons-validator/commons-validator -->
+        <dependency>
+            <groupId>commons-validator</groupId>
+            <artifactId>commons-validator</artifactId>
+            <version>${apache.commons-validator.version}</version>
+        </dependency>
+    </dependencies>
+
     <build>
         <finalName>core-java-networking-4</finalName>
     </build>
 
+    <properties>
+        <apache.commons-validator.version>1.7</apache.commons-validator.version>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-networking-3/src/main/java/com/baeldung/urlvalidation/UrlValidation.java b/core-java-modules/core-java-networking-4/src/main/java/com/baeldung/urlvalidation/UrlValidation.java
similarity index 100%
rename from core-java-modules/core-java-networking-3/src/main/java/com/baeldung/urlvalidation/UrlValidation.java
rename to core-java-modules/core-java-networking-4/src/main/java/com/baeldung/urlvalidation/UrlValidation.java
diff --git a/core-java-modules/core-java-networking-4/src/main/resources/logback.xml b/core-java-modules/core-java-networking-4/src/main/resources/logback.xml
new file mode 100644
index 0000000000..7d900d8ea8
--- /dev/null
+++ b/core-java-modules/core-java-networking-4/src/main/resources/logback.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/core-java-modules/core-java-networking-3/src/test/java/com/baeldung/urlvalidation/UrlValidateUnitTest.java b/core-java-modules/core-java-networking-4/src/test/java/com/baeldung/urlvalidation/UrlValidateUnitTest.java
similarity index 100%
rename from core-java-modules/core-java-networking-3/src/test/java/com/baeldung/urlvalidation/UrlValidateUnitTest.java
rename to core-java-modules/core-java-networking-4/src/test/java/com/baeldung/urlvalidation/UrlValidateUnitTest.java