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%\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-10-wireless-networks.pdf)
  /Creator (Cheatography)
  /Author (Aelphi (Aelphi))
  /Subject (Network+ | 10. Wireless Networks Cheat Sheet)
}

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% Header and Footer
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\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}}
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\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Network+ | 10. Wireless Networks Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Aelphi (Aelphi)} via \textcolor{DarkBackground}{\uline{cheatography.com/179727/cs/37877/}}}
\end{tabulary}
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\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 24th March, 2023.\\
   Updated 28th March, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
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  \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{2.56 cm} x{5.44 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Wireless Network}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{WIFI}} standard & IEEE 802.11 \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
 & AdHoc (p2p) or Infrastructure mode (star topo) \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{WAP}} & {\emph{Wireless Access Point}} \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
 & extend wired LAN into wireless domain, devices are in the same subnet, single collision domain. \tn 
% Row Count 9 (+ 4)
% Row 4
\SetRowColor{LightBackground}
{\bf{Wireless Router}} & gateway device, routing capacity added. \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.48 cm} x{5.52 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Wireless Service Sets}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{IBSS}} & adHoc mod only, no AP, no internet \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{BSS}} & one single AP connected to network \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{ESS}} & Several AP to extend coverage \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{Mesh Topology}} & combination of several types (WIFI, MW, cellular, etc) \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{AP Placement}} & Enough coverage but limit ovelapping \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
2.4GHz & 10-15\% overlapping, but with diff. channels. Channels shall not overlap \tn 
% Row Count 13 (+ 3)
% Row 6
\SetRowColor{LightBackground}
5 GHz & 2 cells separation minimum \tn 
% Row Count 14 (+ 1)
% Row 7
\SetRowColor{white}
{\bf{Sites survey}} & heatmaps to dertemine coverage gaps \tn 
% Row Count 16 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{Range extender}} & wireless repeater \tn 
% Row Count 18 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Antennas}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Effectiveness factors}} & distance, pattern, environment \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Omnidirectional}} & radiates equally in all directions \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Unidirectional}} & focus power in one direction, covers long distances (Yagi antenna) \tn 
% Row Count 7 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.508 cm} x{2.356 cm} x{2.736 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{8.4cm}}{\bf\textcolor{white}{802.11 standards}}  \tn
% Row 0
\SetRowColor{LightBackground}
802.11b & 2.4GHz & 11Mbps \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
802.11g & " & 56Mbps \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
802.11a & 5GHz & 56Mbps \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
802.11ac (WIFI5) & " & 3Gbps (MU-MIMO) \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
802.11n (Wifi 4) & 2.4 and 5GHz & 150-600 Mbps (MIMO) \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
802.11ax (Wifi 6) & 2.4, 5GHz \& 6GHz & 9.6Gbps (MU-MIMO) \tn 
% Row Count 9 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.4 cm} x{5.6 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Frequencies}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{DSSS}} & Spread spectrum modulation, reliable, inefficent use of bandwith \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{FHSS}} & Spread spectrum modulation, increased security, limited bandwith, latency \& complexity (syncro) \tn 
% Row Count 7 (+ 4)
% Row 2
\SetRowColor{LightBackground}
{\bf{OFDM}} & Multi carrier modulation (52 streams) \tn 
% Row Count 9 (+ 2)
% Row 3
\SetRowColor{white}
-{}-{}-{}-{}-{}-{}-- & -{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-- \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Channel}} & virtual medium to exchange data \tn 
% Row Count 13 (+ 2)
% Row 5
\SetRowColor{white}
2.4GHz & 11-14 channels (US, World, Japan) \tn 
% Row Count 15 (+ 2)
% Row 6
\SetRowColor{LightBackground}
 & {\bf{1, 6 \& 11}} non-overlapping channels \tn 
% Row Count 17 (+ 2)
% Row 7
\SetRowColor{white}
5GHz & 24 non-overlapping channels, 20MHz size \tn 
% Row Count 19 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\emph{Channel Bonding}} & wider channel created with merging neighboring channels \tn 
% Row Count 21 (+ 2)
% Row 9
\SetRowColor{white}
-{}-{}-{}-{}-{}-{}-- & -{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-- \tn 
% Row Count 23 (+ 2)
% Row 10
\SetRowColor{LightBackground}
{\bf{RFI}} & Interferences due to similar fq on several devices \tn 
% Row Count 25 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{CSMA/CA}} & Collision avoidance principle \tn 
% Row Count 27 (+ 2)
% Row 12
\SetRowColor{LightBackground}
 & Request to Send \textless{}\textgreater{} Clear to Send \tn 
% Row Count 29 (+ 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}{Wireless Security}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{PSK}} & Pre-Shared Key = WIFI Key \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{WEP}} & 802.11 original security standard \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\emph{unsecure}} & Initialization Vector ({\bf{IV}}) \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{WPA}} & {\bf{TKIP}} (IV+RC4) \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\emph{replace WEP}} & MIC (integrity check) \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
{\bf{WPA2}} & 802.11i standard \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
{\emph{strong}} & {\bf{CCMP}} integrity check \tn 
% Row Count 10 (+ 1)
% Row 7
\SetRowColor{white}
 & {\bf{AES}} encryption \tn 
% Row Count 11 (+ 1)
% Row 8
\SetRowColor{LightBackground}
Authentication & Entreprise vs Personnal mode \tn 
% Row Count 13 (+ 2)
% Row 9
\SetRowColor{white}
 & credentials vs PSK \tn 
% Row Count 14 (+ 1)
% Row 10
\SetRowColor{LightBackground}
{\bf{802.1x}} & network authentication for each user \tn 
% Row Count 16 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{EAP}} & secured tunneling using 802.1x \tn 
% Row Count 18 (+ 2)
% Row 12
\SetRowColor{LightBackground}
{\bf{MAC Filtering}} & listing of permitted MAC adresses \tn 
% Row Count 20 (+ 2)
% Row 13
\SetRowColor{white}
{\bf{NAC}} & permission on devices' characteristics like OS or antivirus version \tn 
% Row Count 23 (+ 3)
% Row 14
\SetRowColor{LightBackground}
{\bf{Captive Portals}} & web page with credential login or certificate \tn 
% Row Count 25 (+ 2)
% Row 15
\SetRowColor{white}
{\bf{Geofencing}} & GPS or RFID real-world boundaries \tn 
% Row Count 27 (+ 2)
% Row 16
\SetRowColor{LightBackground}
{\bf{Disable SSID broadcast}} & but can be detected with sniffing tools \tn 
% Row Count 29 (+ 2)
% Row 17
\SetRowColor{white}
{\bf{Rogue AP}} & Malicious AP setup to capture packets \tn 
% Row Count 31 (+ 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}{Wireless Security (cont)}}  \tn
% Row 18
\SetRowColor{LightBackground}
{\bf{Wardriving}} & reconnaissance looking for unsecured Wless NW \tn 
% Row Count 2 (+ 2)
% Row 19
\SetRowColor{white}
{\bf{War chalking}} & symbols on a wall to notify AP charac. \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}