diff --git a/00. Jeremy's IT LAB CCNA course.md b/00. Jeremy's IT LAB CCNA course.md
index b61e6c1..13e3986 100644
--- a/00. Jeremy's IT LAB CCNA course.md	
+++ b/00. Jeremy's IT LAB CCNA course.md	
@@ -21,3 +21,4 @@ tags:
 [[IPv4 Header]]
 [[Routing Fundamentals]]
 [[Static Routing]]
+[[The Life of a Packet]]
diff --git a/12. The Life of a Packet.md b/12. The Life of a Packet.md
new file mode 100644
index 0000000..b0ec68d
--- /dev/null
+++ b/12. The Life of a Packet.md	
@@ -0,0 +1,92 @@
+---
+id: 1777801183-SYMV
+aliases:
+  - The Life of a Packet
+tags: []
+---
+
+# The Life of a Packet
+
+## Network Topology
+
+![Diagram](./Images/Diagram_Static_routing.png)
+
+We will follow a packet from PC1 to PC4
+
+mac address for the machine
+
+PC 1 -> 1111
+R1 -> G0/2 aaaa -> G0/0 -> bbbb
+R2 -> G0/0 cccc -> G0/1 -> dddd
+R4 -> G0/0 eeee -> G0/1 -> ffee
+PC 4 -> 4444
+
+SRC: 192.168.1.1
+DST: 192.168.4.1
+
+PC 1 is in the 192.168.1.0/24 network it need to send the packet in another network
+
+First PC will use An ARP request
+it need to find the next interface for the sending the packet
+
+SRC IP: 192.168.1.1
+DST IP: 192.168.1.254 -> gateway 
+DST MAC: ffff.fff.fff -> all of the interface
+Src MAC: 1111
+
+ARP request = Broadcast 
+ARP requply = UNICAST 
+
+R1 will answer with an ARP Reply
+
+SRC IP: 192.168.1.254
+DST IP: 192.168.1.1 -> PC1
+DST MAC: 1111 
+Src Mac: aaaa
+
+Now PC1 now the Mac address of the default gateway and will encapsulated the packet 
+with the internet header
+
++-----------------+--------+
+|SRC: 192.168.1.1 |Dst:aaaa|
+|DST: 192.168.4.1 |Src:1111|
++-----------------+--------+
+
+R1 Receive the packet and watch the routing table and see
+
+Destination        Next Hop
+192.168.4.0/24   192.168.12.2
+
+R1 will encapsulated the packet for sending to R2
+He will have tot do an ARP request
+R2 send a arp reply
+Same process as above
+
++-----------------+--------+
+|SRC: 192.168.1.1 |Dst:cccc|
+|DST: 192.168.4.1 |Src:bbbb|
++-----------------+--------+
+
+
+R2 Receive the packet and watch the routing table 
+R2 will encapsulated the packet for sending to R4
+He will have tot do an ARP request
+R4 send a arp reply
+Same process as above
+
++-----------------+--------+
+|SRC: 192.168.1.1 |Dst:eeee|
+|DST: 192.168.4.1 |Src:dddd|
++-----------------+--------+
+
+R4 Receive the packet and watch the routing table 
+R4 will encapsulated the packet for sending to PC4
+He will have tot do an ARP request
+PC4 send a arp reply
+Same process as above
+
++-----------------+--------+
+|SRC: 192.168.1.1 |Dst:4444|
+|DST: 192.168.4.1 |Src:ffee|
++-----------------+--------+
+