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Below are some useful terms and their definitions.
 
Below are some useful terms and their definitions.
   −
ADSL
+
ADSL and ADSL2
 
  Asymmetric Digital Subscriber Line. ADSL is a technology to transmit digital  
 
  Asymmetric Digital Subscriber Line. ADSL is a technology to transmit digital  
 
  information at high bandwidths across existing copper phone lines.  Download  
 
  information at high bandwidths across existing copper phone lines.  Download  
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LDAP
 
LDAP
 
   Lightweight Directory Access Protocol
 
   Lightweight Directory Access Protocol
PPTP
+
PPTP (see VPN)
   Warning: PPTP is insecure, deprecated and should be avoided
+
  Point-to-Point Tunneling Protocol
  Point-to-Point Tunneling Protocol (see VPN)
+
   Warning: PPTP is completely insecure, deprecated and should be avoided.
 
RAID1
 
RAID1
 
   Disk mirroring
 
   Disk mirroring
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SSH
 
SSH
 
   Secure shell. A secure, encrypted way to log in to a remote machine across a network,
 
   Secure shell. A secure, encrypted way to log in to a remote machine across a network,
   or to copy files from a local machine to a server
+
   or to copy files from a local machine to a server. It also supports secure file transfer via sFTP or SCP.
 +
VDSL and VDSL2
 +
Very high-speed Digital Dubscriber Line. VDSL can provide up to 52 Mbit/s down and 16 Mbit/s up. VDSL2 can reach rates up to 300+ Mbit/s downstream and upstream.
 
VPN
 
VPN
   Virtual Private Network (see PPTP)
+
   Virtual Private Network
 +
  Currently directly supported protocol is OpenVPN; IPsec/xl2tpd are available as contribs, and coming soon userspace Wireguard support, Wireguard is now part of the Linux kernel.

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