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#language en
= Cisco and Networking Acronyms =
 * Links [[cisco/TLA]]
 * VLAN - Virtual lan
   * 802.1q

 * WiFi - Wireless Fidelity
   * WPA2 (WPA is an 802.11i)
     * AES - Encryption
   * 802.1x (NAC)
   * 802.11 b(2.4Ghz-3ch) g n(150) a(5Ghz-12ch) ac

 * MPLS - Multiprotocol Label Switching
   * VRF - Virtual routing and forwarding
     * VRF lite (VRFs without MPLS)

 * QOS
   * policy

 * Nexus
   * Enable individual features in software
     * feature lacp
     * feature vpc
   * vPC (virtual port channel)
     * Rules
       * forward a frame received on a member link out any other member link 
       * VPC peer link - only used during failure of member link to reach matching member link.
         * Gotcha:
           * peer link and OSPF device on vlan, sends ospf traffic to wrong peer(multicast mac) and it is not allowed to forward it to correct peer.
       * peer-keepalive link, keep separate from vPC link, to detect failure and prevent loops.

   * fex (Fabric extender)
   * port-channel
     * LACP, 802.3ad, 802.1ax, Cisco Etherchannel, NIC teaming
       * LACPDU frames to ensure correct bonding. 

 * WWW
   * [[BGP]]
   * DNS servers.
   * DMVPN Dynamic Multipoint VPN - dynamic secure overlay networks.
     1. mGRE - Multipoint. GRE (mGRE) 
     2. NHRP - Next-Hop Resolution Protocol.

 * Voip - Voice over ip
   * SIP
   * E1 - 31 Channel ISDN
   * MGCP - Media Gateway Control Protocol, (MGCP) is a signaling and call control communications protocol.
   * SCCP - Skinny Client Control Protocol
   * CM - Cisco Unified Communications Manager Version 9.0

 * 
   * DWDM - Dense wavelength division multiplexing
     *  40 channels at 100 GHz spacing or 80 channels with 50 GHz spacing. 
   * CWDM
     * provides up to 16 channels across multiple transmission windows
   * Gray Lasers
   * ADVA - 

 * NFV - network functions virtualization (NFV).
 
 * Routing protocols
   * BGP
     * BGP-LS - (Was BGP-TE Traffic Engineering)
       * Carry link info in TLV's e.g. BW etc.
         * TLV - Type-length-value
         * NLRI - Network Layer Reachability Information - is exchanged between BGP routers using UPDATE messages
   * OSPF
   * ISIS
   * RIP
   * EIGRP ( Cisco Proprietary)    
...