docs: add documentation for the examples (#288)

Co-authored-by: Manuel Pol <[email protected]>

Author: MegaRedHand

README.md

@@ -13,6 +13,7 @@ You can access it [here](https://megaredhand.github.io/network-simulator/).
 - [GEduNet 🌐](#gedunet-)
 - [**GEduNet - User Manual** 📘](#gedunet---user-manual-)
   - [Getting Started](#getting-started)
+  - [User Interface](#user-interface)
     - [Left Bar](#left-bar)
     - [Right Bar](#right-bar)
     - [Top Bar](#top-bar)
@@ -62,6 +63,11 @@ You can access it [here](https://megaredhand.github.io/network-simulator/).
 
 Welcome to the GEduNet simulator! This application is designed to help you visualize and understand computer networks.
 
+This repository includes some examples under `examples/`.
+You can download and load them into the simulator like any other network.
+
+## User Interface
+
 GEduNet consists of 4 main components on screen:
 
 1. Right bar: Shows information about the selected device.

examples/README.md

@@ -0,0 +1,28 @@
+# Examples
+
+This directory has some example networks ready to be loaded into the simulator.
+We also include some information on each example here.
+
+## [HTTP Client-Server](./httpClientServer.json)
+
+This example includes three hosts and two routers, simulating a server and multiple clients that communicate through the internet.
+To see it in action, run the HTTP request program in one of the clients, selecting the HTTP server as the destination.
+
+## [Local network](./localNetwork.json)
+
+This example includes three hosts connected by a single switch, simulating a local area network.
+A good place to check how ARP requests work!
+
+## [Misconfigured router](./misconfiguredRouter.json)
+
+This example includes two hosts connected through a loop of three routers.
+One of the hosts is running the "Echo server" program, which regularly sends ICMP echo packets.
+However, the packets don't ever reach the other host, since one of the router's routing tables is misconfigured.
+The routing table entry for the receiving host instead points to the next router on the loop, causing the packet to be forever lost in the network.
+After a while, the packets are dropped due to their TTL decreasing to zero.
+
+## [Subnetting](./subnetting.json)
+
+This example includes multiple hosts, routers, and switches.
+Each host represents a group of hosts, shown in their tags.
+It was inspired by an exercise on subnet partitioning and routing table configuration.