Add dhcp illustration

content/guides.json

@@ -1,4 +1,14 @@
 [
+  {
+    "title": "DHCP in One Picture",
+    "description": "Here is what happens when a new device joins the network.",
+    "url": "/guides/dhcp-in-one-picture",
+    "fileName": "dhcp-in-one-picture",
+    "featured": true,
+    "author": "kamranahmedse",
+    "updatedAt": "2020-04-28T15:48:21.191Z",
+    "createdAt": "2020-04-28T15:48:21.191Z"
+  },
   {
     "title": "SSL vs TLS vs SSH",
     "description": "Quick tidbit on the differences between SSL, TLS, HTTPS and SSH",

content/guides/dhcp-in-one-picture.md

@@ -0,0 +1,3 @@
+[![](/guides/dhcp.png)](/guides/dhcp.png)
+
+Here is the [original tweet](https://twitter.com/kamranahmedse/status/1254142557417857025) where this image was posted.

public/sitemap.xml

@@ -30,6 +30,12 @@
               <lastmod>2020-01-29T07:49:29.706Z</lastmod>
               <priority>1.0</priority>
           </url>
+<url>
+              <loc>https://roadmap.sh/guides/dhcp-in-one-picture</loc>
+              <changefreq>monthly</changefreq>
+              <lastmod>2020-04-28T15:48:21.191Z</lastmod>
+              <priority>1.0</priority>
+          </url>
 <url>
               <loc>https://roadmap.sh/guides/ssl-tls-https-ssh</loc>
               <changefreq>monthly</changefreq>
@@ -117,7 +123,7 @@
 <url>
               <loc>https://roadmap.sh/guides</loc>
               <changefreq>monthly</changefreq>
-              <lastmod>2020-01-29T07:49:29.711Z</lastmod>
+              <lastmod>2020-04-24T18:38:33.437Z</lastmod>
               <priority>1.0</priority>
           </url>
 <url>