diff --git a/net/proto/nat.txt b/net/proto/nat.txt
new file mode 100644
index 000000000..8f7798f1e
--- /dev/null
+++ b/net/proto/nat.txt
@@ -0,0 +1,7 @@
+2024
+MerionAcademy - How NAT Saved Inet ru of 11:41
+    https://www.youtube.com/watch?v=LqkIJc0rEfs
+    ! 3:30 - NAT translates local address to a global one
+    ! Router has a pool of global addresses
+    ! Static and Dynamic NAT
+    ! PAT - port-address translation (can translate multiple local addresses (port) to a single global one)
diff --git a/pl/cross/tools/ide/jetbrains/idea/docs/presentations.txt b/pl/cross/tools/ide/jetbrains/idea/docs/presentations.txt
index 5035ef2da..114d63c68 100644
--- a/pl/cross/tools/ide/jetbrains/idea/docs/presentations.txt
+++ b/pl/cross/tools/ide/jetbrains/idea/docs/presentations.txt
@@ -1,5 +1,5 @@
 2024
-SpringIO - IntelliJ IDEA Tips and Tricks for Spring Developers by Anton Arhipov 11:00 of 56:15
+SpringIO - IntelliJ IDEA Tips and Tricks for Spring Developers by Anton Arhipov 13:00 of 56:15
     https://www.youtube.com/watch?v=1kum1N_-cb0
     https://www.jetbrains.com/idea/spring/
     C-E - Recent Files (with shortcuts)
diff --git a/pl/java/features/io/network/docs/presentations.txt b/pl/java/features/io/network/docs/presentations.txt
new file mode 100644
index 000000000..ce5f92c0b
--- /dev/null
+++ b/pl/java/features/io/network/docs/presentations.txt
@@ -0,0 +1,14 @@
+2016
+NaumenTalks - Rogozin - What Every Java Developer Need to Know About Networks 24:00 of 59:39
+    https://www.youtube.com/watch?v=yYxypJRjgJM
+    ! 8:00 - After socket.close() it still lives at OS-level, sending buffered data
+    ! FIN - graceful shutdown of connection
+    ! RST - connection reset (terminated in unknown state)
+    ! Closing TCP Connection
+    !   all buffered data is sent
+    !   ... TIME_WAIT ...
+    ! SO_LINGER is enabled
+    !   OS will keep connection for some timeout
+    !   if timeout is reached, connection will be reset
+    ! 17:00 - TCP FSM inside Kernell (wiki/Transmission_Control_Protocol)
+    ! TCP Sliding Window (send window - 64 kb - SO_RCVBUF - at receiving side)
diff --git a/pl/java/features/io/http/http-client.txt b/pl/java/features/io/network/http/http-client.txt
similarity index 100%
rename from pl/java/features/io/http/http-client.txt
rename to pl/java/features/io/network/http/http-client.txt
diff --git a/pl/java/features/io/http/reactive-http.txt b/pl/java/features/io/network/http/reactive-http.txt
similarity index 100%
rename from pl/java/features/io/http/reactive-http.txt
rename to pl/java/features/io/network/http/reactive-http.txt
diff --git a/pl/java/features/io/tcp/sockets.txt b/pl/java/features/io/network/tcp/sockets.txt
similarity index 100%
rename from pl/java/features/io/tcp/sockets.txt
rename to pl/java/features/io/network/tcp/sockets.txt