Cisco and Networking Acronyms

• 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

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