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Week 3: Network Protocols and Communication (OSI Model and TCP/IP Model…
Week 3: Network Protocols and Communication
Rules of Communication
Rules Establishment
Protocols for effective communication
Includes
Identified sender & receiver
Common language & grammar
Speed and timing of delivery
Confirmation or knowledge requirements
Benefits of Using Layered Model
Assisting in protoocol
Different vendors can work together
Preventing techology changes in one layer
Provide a common language to describe
Data Transfer in the Network
Data Encapsulation
Message Segmentation
Multiplexing
Sending smaller pieces, many different conversations can be interleaved on the network.
Protocol Data Units
Encapsulation Process
Application data is passed down the protocol stack, information is added at each slack.
Layers
Data - Application Layer PDU
Segment - Transport Lay
Network Protocol
Definition: A common format and set of rules for exchanging messages between devices.
Protocol Interaction
HTTP
web server & web client
TCP
transport protocol
IP
encapsulate the TCP segments, packets, assigns address
Ethernet
communicate over data link and physical transmission
OSI Model and TCP/IP Model Comparison
Application
Application
Data
Presentation
Application
Data
Session
Application
Data
Transport
Transport
Segment
Network
Internet
Packet
Data Link
Network Address
Frame
Physical
Network Access
Bits
Internet Standards
Internet Society (ISOC)
Internet Architecture Board (IAB)
Internet Engineering Task Force (IETF)
Internet Research Task Force (IRTF)
Internet Corporation for Assigned Names and Numbers (ICANN)
Internet Assigned Numbers Authority (IANA)