Encapsulation is a process of adding control information as it passes down through the layered model such as Open Systems Interconnection (OSI) Model# and Internet Protocol Suite (TCP/IP)#. It is in direct contrast to Decapsulation.
Encapsulation
- TRS2251 Chapter 1: Introduction to OSI Model and Internetworking
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Secure Shell (SSH)
SSH is a protocol that aim to establish a secure #202206151232 connection between two computers. It uses the #202203221212 in order to secure the network communication between two hosts. Additionally, one could utilise the 202203221227# feature in order to Encapsulation# one Protocol (usually insecure) under SSH thus enhance the security of the protocol.
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Protocol Data Units (PDU)
PDU is the basic data communication unit for layers in #Open Systems Interconnection (OSI) Model. It includes important data such as control information (in the form of headers and trailers) and user data. Each layer may name it differently. If the PDU is pass down (from higher layer to lower layer), the process is called Encapsulation# as more control information are added to it. Otherwise, it is Decapsulation#, where control information are strip over as it is passed up the stack.
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Protocol
Protocol is rules that govern communications. It usually needs to have an identified sender and receiver, common language and grammar or syntax, speed and timing of delivery, and confirmation or acknowledgement requirements. A typical computer protocol includes message encoding, *message formatting and encapsulation#*, message size, Message Timing#, and message delivery options#.
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Decapsulation
Decapsulation is a process of removing control information as it passes down through the layered model such as Open Systems Interconnection (OSI) Model# and Internet Protocol Suite (TCP/IP)#. It is in direct contrast to Encapsulation.
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Data Link Layer
Data Link layer is the second layer for #Open Systems Interconnection (OSI) Model. It is referred as Link Layer together with Physical Layer in #Internet Protocol Suite (TCP/IP). Its responsibility is to establish a communication session between two different devices at node level regardless of network types. It will encapsulate# the data with a header that includes the information about the protocol used and the source and destination Media Access Control Address (MAC)#. All Ethernet switching and bridging are done here. Its #Protocol Data Units (PDU)# is a frame.