diff --git a/docs/multichoice-questions/networking_OSI_model.html b/docs/multichoice-questions/networking_OSI_model.html
index 503c99c..1dd235f 100644
--- a/docs/multichoice-questions/networking_OSI_model.html
+++ b/docs/multichoice-questions/networking_OSI_model.html
@@ -4,7 +4,7 @@
     <html>
     <head>
         <title>
-    Networking - OSI Model - multichoice questions
+    Networking - OSI Model
     </title>
         <meta name="viewport" content="width=device-width, initial-scale=1" xmlns="http://www.w3.org/1999/html">
         <script src="https://polyfill.io/v3/polyfill.min.js?features=TextEncoder%2Ccrypto.subtle"></script>
@@ -33,7 +33,7 @@
             }
         </style>
         <script>
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+            const solutions = {'1': 'e443169117a184f91186b401133b20be670c7c0896f9886075e5d9b81e9d076b', '2': '0c5a34dcbbf1c6db658c12162bb23612446680ac217921bd85fe2b6ea31f9c95', '3': 'dee0e46ee9d67151bdf0e8b4fc1b33070c9713fe3299ea46be32e4bcc997ed6b', '4': 'c2df35004019b16591cc9c7ef6147b589d1eabd2dbd98232859c3cf9acd74a37', '5': '9c978dcb04837772fa07f07e3c1a8ccb8aa4b7bb175a9e96b8f1ccb0c71f474a'}
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     </head>
     <body>
@@ -45,8 +45,8 @@
             </p>
             
 
-    <h1>Networking - OSI Model - multichoice questions</h1>
-<p>Please answer the quiz and click the "Test" button at the bottom right.</p>
+    <h1>Networking - OSI Model</h1>
+<p><strong>Please answer the quiz and click the "Test" button at the bottom right.</strong></p>
 <h2>Question 1</h2>
 <p>Which of the following services are guaranteed by UDP?</p>
 <ul style="list-style-type: none;">
@@ -79,6 +79,30 @@ <h2>Question 3</h2>
 <li><input type="checkbox"> Network Interface,  transport, network, application</li>
 <li><input type="checkbox"> Application, network, transport, network interface</li>
 <li><input type="checkbox"> Network, Network interface,  transport, application</li>
+</ul>
+<h2>Question 4</h2>
+<p>How many different hosts can be connected to the subnet denoted by <code>10.0.1.0/24</code>?</p>
+<ul style="list-style-type: none;">
+<li><input type="checkbox"> 254</li>
+<li><input type="checkbox"> 24</li>
+<li><input type="checkbox"> 1024</li>
+<li><input type="checkbox"> 255</li>
+</ul>
+<h2>Question 5</h2>
+<p>Which of the following subnets is most specifically describes the following list of hosts IP:</p>
+<ol>
+<li>172.31.8.17</li>
+<li>172.31.37.152</li>
+<li>172.31.33.152</li>
+<li>172.31.42.73</li>
+<li>172.31.8.46</li>
+</ol>
+<p><br></p>
+<ul style="list-style-type: none;">
+<li><input type="checkbox"> <code>172.31.0.0/16</code></li>
+<li><input type="checkbox"> <code>172.31.0.0/24</code></li>
+<li><input type="checkbox"> <code>172.31.8.0/24</code></li>
+<li><input type="checkbox"> <code>172.0.0.0/16</code></li>
 </ul> 
     
         <script>
@@ -133,9 +157,10 @@ <h2>Question 3</h2>
         </script>
     
         <input type="button" class="floating-button" value="Test" onclick="test()">
-    
+
     </article>    
-    <a href="http://creativecommons.org/licenses/by-nc-sa/4.0/" rel="nofollow"><img src="https://camo.githubusercontent.com/9a588afd926871cf6caaabf8f36acf441a53ed69540c3808e77861fbd3711203/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d434325323042592d2d4e432d2d5341253230342e302d6c6967687467726579" alt="license" data-canonical-src="https://img.shields.io/badge/license-CC%20BY--NC--SA%204.0-lightgrey" style="max-width: 100%;"></a>
+    <a href="http://creativecommons.org/licenses/by-nc-sa/4.0/" rel="nofollow"><img src="https://img.shields.io/badge/license-CC%20BY--NC--SA%204.0-lightgrey" alt="license" style="max-width: 100%;"></a>
+
     </body>
     </html>
     
