\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{Aelphi (Aelphi)}
\pdfinfo{
  /Title (network-09-wans.pdf)
  /Creator (Cheatography)
  /Author (Aelphi (Aelphi))
  /Subject (Network+ | 09.WANs 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}{476A91}
\definecolor{LightBackground}{HTML}{F3F5F8}
\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{Network+ | 09.WANs Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Aelphi (Aelphi)} via \textcolor{DarkBackground}{\uline{cheatography.com/179727/cs/37869/}}}
\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}Aelphi (Aelphi) \\
  \uline{cheatography.com/aelphi} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 23rd March, 2023.\\
   Updated 28th March, 2023.\\
   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{multicols*}{2}

\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Wired Connections Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Dedicated Leased Lines}} & direct connection point to point \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Circuit-Switched}} & using data through dial phone connection (ISDN) \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Packet-Switched}} & idem but multiple users using the same line. \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Connections}}} \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Copper & UTP, STP : Dial-up, ISDN, E1, T1 \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
 & Coax : Cable modem \tn 
% Row Count 10 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Fiber} \tn 
% Row Count 11 (+ 1)
% Row 7
\SetRowColor{white}
Electricity & Broadand over Power Lines (BPL) \tn 
% Row Count 13 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.16 cm} x{5.84 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Wireless Connections}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Cellular}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
3G & 144Kbps-2Mbps | HSPA(+) \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
4G & 100Mbps-1Gbps | LTE, LTE-A \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
 & Low-band | 30-250Mbps (long range) \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
5G & Mid-band | 100-900Mbps (mid range) \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
 & High-band | +Gbps (short range) \tn 
% Row Count 9 (+ 2)
% Row 6
\SetRowColor{LightBackground}
GSM \seqsplit{technology} & widely used - converts voice into data \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
CDMA \seqsplit{technology} & USA - encryption system \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Microwave}}} \tn 
% Row Count 14 (+ 1)
% Row 9
\SetRowColor{white}
UHF, SHF, EHF & Ultra, Super, Extreme High Frequencies \tn 
% Row Count 16 (+ 2)
% Row 10
\SetRowColor{LightBackground}
 & point-to-point connection, fast (1Gbps) but direct line of sight. max 40NM \tn 
% Row Count 19 (+ 3)
% Row 11
\SetRowColor{white}
 & WiMAX, antenna on top of buildings \tn 
% Row Count 21 (+ 2)
% Row 12
\SetRowColor{LightBackground}
{\bf{Satellite}} & over-the-world coverage \tn 
% Row Count 23 (+ 2)
% Row 13
\SetRowColor{white}
 & slow, expensive, high latency \tn 
% Row Count 24 (+ 1)
% Row 14
\SetRowColor{LightBackground}
ex: starlink & low orbit -\textgreater{} latency down to 35ms \tn 
% Row Count 26 (+ 2)
% Row 15
\SetRowColor{white}
{\bf{HF radios}} & for text only, \textless{}10Kbps \tn 
% Row Count 28 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{WAN Technologies}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Dedicated Leased Lines}} & E1-E3 (Europe), T1-T4 : use CSU/DSU \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Metro Ethernet}} & use ethernet protocols on fiber cabling \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{PPP}} & Point-to-Point \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
{\emph{PAP}} & {\emph{Password Athentication Protocol}} | password sent in clear! \tn 
% Row Count 8 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\emph{CHAP}} & {\emph{Challenge-Handshake Athentication Protocol}} \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
{\emph{MS-CHAP}} & both sent hached credentials, security+ \tn 
% Row Count 12 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{PPPoE}} & encapsulates PPP frames inside Ethernet frames \tn 
% Row Count 14 (+ 2)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{{\bf{DSL}}} \tn 
% Row Count 15 (+ 1)
% Row 8
\SetRowColor{LightBackground}
{\emph{ADSL}} | 5.5km & Dwn: 8Mbps, Up:1.5Mbps \tn 
% Row Count 16 (+ 1)
% Row 9
\SetRowColor{white}
{\emph{SDSL}} | 3.3km & Dwn \& Up : 1.17Mbps \tn 
% Row Count 17 (+ 1)
% Row 10
\SetRowColor{LightBackground}
{\emph{VDSL}} | 1.3km & Dwn : 52Mbps, Up:12Mbps \tn 
% Row Count 18 (+ 1)
% Row 11
\SetRowColor{white}
{\bf{Cable Modems}} & use HFC (Hybrid Fiber-Coax) TV infrastructure \tn 
% Row Count 20 (+ 2)
% Row 12
\SetRowColor{LightBackground}
protocol & DOCSIS \tn 
% Row Count 21 (+ 1)
% Row 13
\SetRowColor{white}
{\bf{Satellite Modem}} & limited, expensive, wx sensitive, echo \tn 
% Row Count 23 (+ 2)
% Row 14
\SetRowColor{LightBackground}
{\bf{POTS}} & analog connection, PSTN \tn 
% Row Count 24 (+ 1)
% Row 15
\SetRowColor{white}
{\bf{ISDN}} & carry voice, video or data over B/D channels \tn 
% Row Count 26 (+ 2)
% Row 16
\SetRowColor{LightBackground}
{\bf{Frame Relay}} (FR) & use virtual circuits (VC) \tn 
% Row Count 28 (+ 2)
% Row 17
\SetRowColor{white}
{\bf{SONET}} & 20-250km, til 10Gbits, FDDI (fiber) \tn 
% Row Count 30 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{WAN Technologies (cont)}}  \tn
% Row 18
\SetRowColor{LightBackground}
{\bf{ATM}} & cell-based of fixed 53bytes, use VC \tn 
% Row Count 2 (+ 2)
% Row 19
\SetRowColor{white}
{\bf{MPLS}} & used by service providers on backbone \tn 
% Row Count 4 (+ 2)
% Row 20
\SetRowColor{LightBackground}
{\bf{DMVPN}} & use VPN tunnel to secure WAN connections \tn 
% Row Count 6 (+ 2)
% Row 21
\SetRowColor{white}
Connection speed order & FR, T1, E1, T3, E3, ATM, SONET \tn 
% Row Count 8 (+ 2)
% Row 22
\SetRowColor{LightBackground}
{\bf{mGRE}} & {\emph{multipoint generic routing encapsulation}} \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}