diff --git a/chapter/mgmt.tex b/chapter/mgmt.tex
index d075911..f28a708 100644
--- a/chapter/mgmt.tex
+++ b/chapter/mgmt.tex
@@ -321,8 +321,12 @@ Cisco switches allow by default only the following 3 protos until the client is
 
 \section[SNMP]{Simple Network Management Protocol}
 
+\gls{snmp} is used heavily to monitor the status of network nodes all round with a high level of granularity. \textit{Plus} the option to use traps\footnote{\gls{snmp} event triggered by the network node} for instant communication \tsq{bout} current event/events happing on the node.\cite{wiki:Simple_Network_Management_Protocol}
+
 \fig{snmp/snmphandshake}{snmphandshake}{\gls{snmp} handshake}
 
+\fig[http://ccieordie.com/tag/6-1b/]{snmp/snmpcomparison2}{snmpcomparison2}{\gls{snmp} comparison}
+
 \begin{itemize}
 	\item \itemtitle{v1}{}
 	\begin{itemize}
diff --git a/commands.tex b/commands.tex
index dd42187..5b78ed4 100644
--- a/commands.tex
+++ b/commands.tex
@@ -7,12 +7,19 @@
 }
 
 % Usage: \fig{<path-to-file>}{<label>}{<caption>}
-\newcommand{\fig}[3]{
+\newcommand{\fig}[4][]{
 \begin{figure}[h!]
     \centering
-    \includegraphics[width=0.95\columnwidth]{#1}
-    \caption{#3}
-    \label{fig:#2}
+    \includegraphics[width=0.95\columnwidth]{#2}
+	%
+    \sbox0{#1}%
+	\ifdim\wd0=0pt
+		{\caption{#4}} %if #1 is empty
+	\else
+		{\caption{#4\\\texttt{{\scriptsize #1}}}}
+	\fi
+    %
+    \label{fig:#3}
 \end{figure}
 }
 
diff --git a/img/snmp/snmpcomparison1.png b/img/snmp/snmpcomparison1.png
new file mode 100644
index 0000000..783df09
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diff --git a/img/snmp/snmpcomparison2.png b/img/snmp/snmpcomparison2.png
new file mode 100644
index 0000000..4a68a79
Binary files /dev/null and b/img/snmp/snmpcomparison2.png differ
diff --git a/img/snmp/snmpcomparison3.jpg b/img/snmp/snmpcomparison3.jpg
new file mode 100644
index 0000000..626935c
Binary files /dev/null and b/img/snmp/snmpcomparison3.jpg differ
diff --git a/references-wikipedia.bib b/references-wikipedia.bib
index 2d06337..b023c60 100644
--- a/references-wikipedia.bib
+++ b/references-wikipedia.bib
@@ -24,4 +24,12 @@
     year = "2017",
     howpublished = {\url{http://en.wikipedia.org/w/index.php?title=CDP\%20Spoofing&oldid=740946635}},
     note = "[Online; accessed 04-June-2017]"
+}
+
+@misc{ wiki:Simple_Network_Management_Protocol,
+	author = "Wikipedia",
+	title = "{Simple Network Management Protocol} --- {W}ikipedia{,} The Free Encyclopedia",
+	year = "2017",
+	howpublished = {\url{http://en.wikipedia.org/w/index.php?title=Simple\%20Network\%20Management\%20Protocol&oldid=783942828}},
+	note = "[Online; accessed 05-June-2017]"
 }
\ No newline at end of file
diff --git a/structure.tex b/structure.tex
index b6aaf0a..171d069 100644
--- a/structure.tex
+++ b/structure.tex
@@ -1,4 +1,4 @@
-% Latex Packages
+	% Latex Packages
 \usepackage[T1]{fontenc}
 \usepackage[utf8]{inputenc}
 \usepackage{lmodern}