OSI Model

Specific protocols that operate within each particular layer of the OSI model

Connection-oriented date transfer

a transfer of data that requires the establishment of a connection between communicating endpoints, before the transfer can begin

Connection data transfer

a transfer of data that is serviced without requiring a verified session and without guaranteeing delivery of data

De-Encapsulation

the process of each layer of the OSI model removing the control information headers on incoming information for the corresponding layer at the destination

IANA

Internet Assigned Numbers Authority; a government-funded group responsible for managing IP address allocation and the Domain Name System (DNS)

IEEE

Institute of Electrical and Electronics Engineers; one of the leading standards-making organizations in the world

OSI

Open System Interconnect; developed by the International Standards Organization (ISO)

Application (data), presentation (data), session (data), transport (segment datagram), network (packet), data link (frame), physical (bit)

OUI

Organizationally Unique Identifier; the first 24 bits (or 3 bytes) of a MAC address assigned by IEEE that identifies the network card’s manufacturer

PDU

Protocol Data Unit; a term used to describe the product of encapsulation at a given layer of the OSI model

TCP

Transmission Control Protocol; the connection-oriented protocol of the TCP/IP suite that resides at the Transport layer of the OSI model

UDP

User Datagram Protocol; the connectionless protocol of the TCP/IP suite that resides at the Transport layer of the OSI model

wireshark

a network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It has a rich and powerful feature set and is world's most popular tool of its kind. It runs on most computing platforms including Windows, OS X, Linux, and UNIX. Network professionals, security experts, developers, and educators around the world use it regularly. It is freely available as open source, and is released under the GNU General Public License version 2.” Reference: http://www.wireshark.org