diff --git a/doc/exam_mode.md b/doc/exam_mode.md
index 246dd3a..439f1d7 100644
--- a/doc/exam_mode.md
+++ b/doc/exam_mode.md
@@ -2,12 +2,15 @@
 
 ## Description / use cases
 
-Activating exam_mode provides following functionalities:
-* when -exam user logs in, firewalld.service will start and prevent communication between devices in the same local network
-* home- and media-directory of -exam users will be renamed (on the next day) and removed (after some days).  
-  This is important due the fact, that -exam user will be new created (with new user-id) on exam-mode initialisation.  
-  Without renaming/deleting the home- and media-directory, the -exam user couldn't log in twice on the same pc.  
-  Particularly important on machines with localhome
+**Activating Exam Mode: Functionalities**
+
+When a user logs in with the `-exam` designation, the following functionalities will be activated:
+
+* The `firewalld.service` will start, blocking all incoming traffic. Additionally, it will restrict outgoing traffic to the addresses specified in `exam_destination_allowed_ipv4`, if this variable is set. Communication is permitted with devices listed in `exam_teacherpc_ips`, including the teacher PCs. By default, the IP of the teacher PC is determined by the client's IP, with the last digit in the last octet specified by `exam_teacherpc_last_digit`.
+
+* The home and media directories of `-exam` users will be renamed the following day and removed after a certain period. This is crucial because the `-exam` user will be created anew (with a new user ID) upon the initialization of Exam Mode. Without renaming/deleting the home and media directories, the new `-exam` user would be unable to log in on the same PC, especially on machines with local home configurations.
+
+
 
 ## Requirements
 
@@ -15,10 +18,18 @@ none
 
 ## Example
 
-Per default, all hosts will get exam_mode. But we don't want exam_mode on teacher devices
+Per default, all hosts will get `exam_mode`. But we don't want `exam_mode` on teacher devices. In `exam_mode` the Networks `10.0.0.0/24`, `10.0.1.0/24`, `192.168.122.0/24/24` will be reachable.
 
 inventory.yml
-```
+
+```yml
+all:
+  vars:
+    exam_destination_allowed_ipv4:
+      - 10.0.0.0/24
+      - 10.0.1.0/24
+      - 192.168.122.0/24
+
 teacherdevices:
   hosts:
     10.0.14.[1..75]