Please enable JavaScript.
Coggle requires JavaScript to display documents.
CHAPTER 3: NETWORK PROTOCOLS AND COMMUNICATIONS - Coggle Diagram
CHAPTER 3: NETWORK PROTOCOLS AND COMMUNICATIONS
What is Communication
Human Communication
Message Source (Message) > Transmitter (Signal) > Transmission Medium > Receiver (Signal) > Message Destination (Message)
Establishing the Rules
Common language and grammar
Speed and timing of delivery
Agreed upon method of communicating (face-to-face, telephone, letter, photograph)
Confirmation or acknowledgement requirements
An identified sender and receiver
Message Encoding
Message Source (Message) > Encoder (Signal) > Transmitter > Transmission Medium > Receiver (Signal) > Decoder >Message Destination (Message)
Message Size
The size restrictions of frames require the source host to break
a long message into individual pieces that meet both the minimum and maximum size requirements.
Each segment is encapsulated in a separate frame with the
address information, and is sent over the network.
This is known as segmenting.
At the receiving host, the messages are de-encapsulated and
put back together to be processed and interpreted
Message Timing
Flow Control
Response Timeout
Access Method
Network Protocols
The process by which networking devices share information
about pathways with other networks
How and when error and system messages are passed
between devices
How the message is formatted or structured
The setup and termination of data transfer sessions
Comparing the OSI and TCP/IP Models
OSI Model
(7..Application, 6..Presentation, 5.Session) =
TCP/IP Model
(Application)
OSI Model
(4.Transport) =
TCP/IP
(Transport)
OSI Model
(3.Netowrk) =
TCP/IP
(Internet)
OSI Model
(2..Data Link, 1. Physical) =
TCP/IP Model
(Network Access)
Accessing Local Resources
Network
- Destination and Source Logical Network Addrresses
Transport
- Destination and Source Process Number (ports)
Data Link
- Destination and Source Physical Addresses
Upper Layers
- Encoded Application Data
Physical
- Timing and Synchronization Bits
Protocol Data Units (PDUs)
Packet
Frame
Segment
Data
Bits
Network Addresses & Data Link addresses
Network Address
Source IP address
Destination IP address
Data Link Address
Source data link address
Destination data link address