diff --git a/acronyms.tex b/acronyms.tex
index d5c4835..1f201e7 100644
--- a/acronyms.tex
+++ b/acronyms.tex
@@ -7,9 +7,11 @@
 %\newacronym{}{}{}
 %\newacronym{}{}{}
 %\newacronym{}{}{}
+\newacronym{ap}{AP}{Access Point}
 \newacronym{arp}{ARP}{Address Resolution Protocol}
 \newacronym{bgp}{BGP}{Border Gateway Protocol}
 \newacronym{bpdu}{BPDU}{Bridge Protocol Data Unit}
+\newacronym{cdp}{CDP}{Cisco Discovery Protocol}
 \newacronym{cli}{CLI}{Command Line Interface}
 \newacronym{cst}{CST}{Common Spanning Tree}
 \newacronym{cwdm}{CWDM}{}
@@ -17,7 +19,10 @@
 \newacronym{dhcp}{DHCP}{Dynamic Host Control Protocol}
 \newacronym{dknog}{DKNOG}{Danish Network Operators' Group}
 \newacronym{dns}{DNS}{Domain Name System}
+\newacronym{dst}{DST}{Destination}
 \newacronym{dwdm}{DWDM}{}
+\newacronym{eap}{EAP}{Extensible Authentication Protocol}
+\newacronym{eapol}{EAPOL}{Extensible Authentication Protocol over Local Area Network}
 \newacronym{eigrp}{EIGRP}{Enhanced Interior Gateway Routing Protocol}
 \newacronym{evpn}{EVPN}{Ethernet Virtual Private Network}
 \newacronym{ftp}{FTP}{File Transfer Protocol}
@@ -40,6 +45,7 @@
 \newacronym{mkc}{MKC}{Mikkel Krĝll}
 \newacronym{mpls}{MPLS}{Multiprotocol Label Switching}
 \newacronym{mst}{MST}{Multiple Spanning Tree}
+\newacronym{ntp}{NTP}{Network Time Protocol}
 \newacronym{osi}{OSI}{Open Systems Interconnection}
 \newacronym{ospf}{OSPF}{Open Shortest Path First}
 \newacronym{ospfv3}{OSPFV3}{Open Shortest Path First v3}
@@ -51,12 +57,16 @@
 \newacronym{pvst+}{PVST+}{Per Vlan Spanning Tree Plus}
 \newacronym{rfc}{RFC}{Request For Comments}
 \newacronym{rip}{RIP}{Routing Information Protocol}
-\newacronym{rspt}{RSTP}{Rapid Spanning Tree}
-\newacronym{rpvst+}{RPVST}{Rapid Per Vlan Spanning Tree}
+\newacronym{rstp}{RSTP}{Rapid Spanning Tree Protocol}
+\newacronym{rpvst}{RPVST}{Rapid Per Vlan Spanning Tree}
+\newacronym{rpvst+}{RPVST+}{Rapid Per Vlan Spanning Tree Plus}
 \newacronym{sftp}{SFTP}{Secure Shell File Transfer Protocol}
+\newacronym{sla}{SLA}{Service Level Agreement}
 \newacronym{smtp}{SMTP}{Simpe Mail Transfer Protocol}
 \newacronym{snmp}{SNMP}{Simple Network Management Protocol}
+\newacronym{sntp}{SNTP}{Secure Network Time Protocol}
 \newacronym{sp}{SP}{Service Provider}
+\newacronym{src}{SRC}{Source}
 \newacronym{ssh}{SSH}{Secure Shell}
 \newacronym{stp}{STP}{Spanning Tree Protocol}
 \newacronym{tcn}{TCN}{Topology Change Notification}
@@ -65,6 +75,7 @@
 \newacronym{toc}{TOC}{Table Of Contents}
 \newacronym{udld}{UDLD}{Unidirectional Link Detection}
 \newacronym{udp}{UDP}{User Datagram Protocol}
+\newacronym{utc}{UTC}{Coordinated Universal Time}
 \newacronym{vlan}{VLAN}{Virtual Local Area Network}
 \newacronym{vpn}{VPN}{Virtual Private Network}
 \newacronym{vtp}{VTP}{Virtual Trunking Protocol}
diff --git a/chapter/networkmgmt.tex b/chapter/networkmgmt.tex
index 0d8e3c0..3cf5203 100644
--- a/chapter/networkmgmt.tex
+++ b/chapter/networkmgmt.tex
@@ -129,4 +129,38 @@ tacacs-server unkn0wn!unicAst
     \item user access control by way of governing policies.
 \end{itemize}
 
-\fig{8021x/8021x}{8021x}{ID Management}
\ No newline at end of file
+\fig{8021x/8021x}{8021x}{ID Management}
+
+Based upon the user connecting to the network. They can be given access to
+\begin{itemize}
+    \item the resources their group/identity have been assigned or
+    \item put into a guest \gls{vlan} if nothing is assigned to them or
+    \item simply block the client/user altogether.
+\end{itemize}
+
+Cisco switches allow by default only the following 3 protos until the client is authenticated: \gls{eapol}, \gls{cdp}, \gls{stp} traffic to pass.
+
+\begin{itemize}
+	\item The \textbf{authenticator\footnote{Network node}} is the edge node/\gls{ap} closest to the client/user. This node controls the clients physical access to the network. The node sends encapsulated \gls{eap} frames to the authentication server by radius for validation.
+	\item The \textbf{authentication server}
+\end{itemize}
+
+\fig{8021X/portauth}{portauth}{802.1X Port Auth}
+
+802.1X can be enabled on a Cisco switch globally by \cliline{dot1x system-auth-control} and \textit{then} enabled on the switch port{\footnotesize (s)} by \cliline{aaa authentication dot1x}.
+
+\clearpage
+
+\subsection*{Enable with Cisco config}
+
+\begin{txt}
+aaa new-model
+radius server host radiusserver.example.com key .unkown!unicAst.
+aaa group server radius RADIUS-SERVER-DK
+ server radiusserver.example.com
+aaa authetication dot1x default group RADIUS-SERVER-DK
+dot1x system-auth-control
+interface GigabitEthernet 0/4
+ switchport mode access         ! Port must be an access port prior
+ dot1x port-control auto        ! to enable dot1x on the port
+\end{txt}
diff --git a/img/8021X/portauth.png b/img/8021X/portauth.png
new file mode 100644
index 0000000..2c8bca8
Binary files /dev/null and b/img/8021X/portauth.png differ