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LACNIC - Latin America and Caribbean Network Information Center
LAN - Local Area Network (A network (connected devices and systems) that provides shared communication and resources in a relatively small area.)
LCP - Link Control Protocol (A protocol within a Point-to-Point Protocol (PPP) that establishes, configures, and maintains the network connection - carries out packet encapsulation format options, handles various limits on packet size, and terminates a link when necessary.)
LDAP - Lightweight Directory Access Protocol (Protocol which provides directory services, such as user directory, including user name, password, e-mail, and phone number information, to network clients.)
LEAP - Lightweight Extensible Authentication Protocol (A proprietary protocol developed by Cisco, used in their wireless LAN devices for authentication.)
LHF - Low Hanging Fruit (In the context of cryptography, passwords for system access, which are easily guessed or commonly used. Term often used in a general sense for the most easily accomplished goals.)
LLC - Logical Link Control (In the Open Systems Interconnection (OSI) reference model, a data link layer process which provides message information about the data packets/frames being sent and synchronizes transmissions, so that senders/receivers know when a frame is being sent and when it should be received.)
LOIC - Low Orbit Ion Cannon
LSB - least significant bit (In the area of steganography (the process of hiding messages in pictures or other media), a method of embedding messages in areas or bits within a file which will not alter the file in a visible manner. A message can be embedded in a graphics (picture) file without being noticed.)
LSOs - Local Shared Objects
L2TP - Layer 2 Tunneling Protocol