\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Goldil0cks (adeason)}
\pdfinfo{
  /Title (ip-addressing.pdf)
  /Creator (Cheatography)
  /Author (Goldil0cks (adeason))
  /Subject (IP Addressing Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{A3A3A3}
\definecolor{LightBackground}{HTML}{F3F3F3}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{IP Addressing Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Goldil0cks (adeason)} via \textcolor{DarkBackground}{\uline{cheatography.com/20845/cs/3900/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Goldil0cks (adeason) \\
  \uline{cheatography.com/adeason} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 14th April, 2015.\\
   Updated 12th May, 2016.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.


\begin{tabularx}{17.67cm}{x{2.3058 cm} x{4.4469 cm} x{4.7763 cm} x{4.941 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{17.67cm}}{\bf\textcolor{white}{ADDRESS CLASS: A, B, C}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{Class:} & A & B & C \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Range & 0-127 & 128-191 & 192-223 \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
N/H & N.H.H.H & N.N.H.H & N.N.N.H \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
\seqsplit{Network} Bits & Nx8 = 8 & Nx8 = 16 & Nx8 = 24 \tn 
% Row Count 7 (+ 3)
% Row 4
\SetRowColor{LightBackground}
Host Bits & Hx8 = 24 & Hx8 = 16 & Hx8 = 8 \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
\# \seqsplit{Addresses} & 16,777,210 & 66,536 & 256 \tn 
% Row Count 12 (+ 3)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{Private} Range & 10.0.0.0 - \seqsplit{10.255.255.255} & 172.16.0.0 - \seqsplit{172.31.255.255} & 192.168.0.0 - \seqsplit{192.168.255.255} \tn 
% Row Count 15 (+ 3)
% Row 7
\SetRowColor{white}
\seqsplit{Subnet} Mask & 255.0.0.0 & \seqsplit{255.255.0.0} & \seqsplit{255.255.255.0} \tn 
% Row Count 18 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{p{1.687 cm} x{3.0366 cm} x{12.1464 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{ADDRESS CLASS: D \& E}}  \tn
% Row 0
\SetRowColor{LightBackground}
CLASS & RANGE & NOTE \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
D & 224 - 239 & reserved for multicasting \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
E & 240 - 255 & reserved for research \& development \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{p{3.1293 cm} p{3.1293 cm} p{4.1175 cm} p{6.0939 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{17.67cm}}{\bf\textcolor{white}{Power of 2 table}}  \tn
% Row 0
\SetRowColor{LightBackground}
2\textasciicircum{}0 & 1 & 2\textasciicircum{}8 & 256 \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
2\textasciicircum{}1 & 2 & 2\textasciicircum{}9 & 512 \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
2\textasciicircum{}2 & 4 & 2\textasciicircum{}10 & 1,024 \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
2\textasciicircum{}3 & 8 & 2\textasciicircum{}11 & 2,048 \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
2\textasciicircum{}4 & 16 & 2\textasciicircum{}12 & 4,096 \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
2\textasciicircum{}5 & 32 & 2\textasciicircum{}13 & 8,192 \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
2\textasciicircum{}6 & 64 & 2\textasciicircum{}14 & 16,384 \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
2\textasciicircum{}7 & 128 & 2\textasciicircum{}15 & 32,768 \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{p{1.647 cm} p{2.6352 cm} x{7.9056 cm} x{4.2822 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{17.67cm}}{\bf\textcolor{white}{BIT, VALUE, MASK}}  \tn
% Row 0
\SetRowColor{LightBackground}
BIT & VALUE & N-BITS / H-BITS & MASK \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
1 & 128 & 1 / 7 & 10000000 \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
2 & 192 & 2 / 6 & 11000000 \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
3 & 224 & 3 / 6 & 11100000 \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
4 & 240 & 4 / 4 & 11110000 \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
5 & 248 & 5 / 3 & 11111000 \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
6 & 252 & 6 / 2 & 11111100 \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
7 & 254 & 7 / 1 & 11111110 \tn 
% Row Count 8 (+ 1)
% Row 8
\SetRowColor{LightBackground}
8 & 255 & 8 / 0 & 11111111 \tn 
% Row Count 9 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{6.5626 cm} x{10.7074 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{SOME FORMULAS}}  \tn
% Row 0
\SetRowColor{LightBackground}
\# BLOCKS FOR LARGE \#s & 2\textasciicircum{}H / 256 = \# BLOCKS \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
NUMBER OF SUBNETS = & 2\textasciicircum{}n     ( n = Number of borrowed bits from host) \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
NUMBER HOSTS PER SUBNET = & (2\textasciicircum{}h - 2)    ( h = Number of Host bits) \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{Hosts have always been with the "-2" part.  Because the network address and broadcast address have always been unusable for hosts.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}



\end{document}