Photo twenty twenty

ATM Security

ATM Security.
ATM Security

Jedes Schild hat eine Geschichte. Und so wahrscheinlich auch dieses. Man mag ja gar nicht drüber nachdenken, ob denn noch andere Gegenstände als nur Büroklammern gemeint sind.

daily, photo, 15.09.2020.

Security & Privacy

Packet Switching / WAN Technology

  • X.25: defines communication between DTE and DCE devices.
  • Switched multimegabit data services (SMDS):
    • Is a connectionless protocol and can provide bandwidth for exchange of large amounts of data.
    • A connectionless, high-speed, datagram-based WAN technology for communication over public data networks.
  • Frame Relay: Forwards packets to their destinations and doesn’t unpack frames at each node.
  • Link access procedure balanced (LAPB): Ensures that frames are conrrectly sequenced and error free.
  • Asynchronous transfer mode (ATM):
    • transmits data in fixed size cells of 53 byte and can provide bandwidth on demand.
    • Connection oriented switching technology that uses a cell-switching method.
  •  Synchronous data link control (SDLC): bit oriented synchronous protocol.
  • High level data link control (HDLC): A bit oriented data link protocol.
  • Switching: A virtual connection which acts like a dedicated link between the sender and the receiver devices.
  • Password authentication protocol (PAP): uses an authentication server to compare supplied credentials against stored credentials.
  • Challenge handshake authentication protocol (CHAP): enables user auth without revealing a shared password between two entities.
  • Extensible Authentication Protocol (EAP): works directly at the data link layer.
  • Point-to-point protocol (PPP): Supports asynchronous and synchronous connections and network protocol multiplexing.
  • Serial Line Internet Protocol (SLIP): Frames datagrams for transmission but doesn’t provide error detection or data compression.