module 5 - Communication principles Flashcards
this protocol is concerned with the delivery of a message from one NIC to another NIC
describe
Ethernet
which layers of the OSI model does the
ethernet protocol
operate at
this operates at :
layer 1 (physical) and
layer 2 (data link)
layers of the OSI model
a protocol may implement a pattern while communicating for reasons such as keeping in sync or perhaps confirming messages have been succsefully received
describe the purpose of
message pattern
that may be used by a protocol
what is a
protocol model
this is a model that describes and closely matches the structure of a particular protocol suite.
example
The TCP/IP model is this because it describes all the functions that exist within the TCP/IP suite
describe
Hypertext transfer protocol (HTTP)
this protocol governs how a web server and a web client interact such as the content of a message including any headers and also the structure of the message
this layer of the TCP/IP model is concerned with:
control of hardware devices and the media that makes up the network
describe the
Network access layer
of the
TCP/IP model
describe the
Application layer
of the
OSI model
this layer of the OSI model is concerned with:
the manipulation and displaying of data
a protocol may implement this so that their is a regulation of how large a message can be
Sometimes it is best to split a large message up into smaller messages so that data can be sent more reliably
describe the purpose of a
message size
that may be used by a protocol
what is a
reference model
this is a model that describes how a function at a given level should operate but does not give any detail of how that should be implemented.
The benefit of a this is to provide clearer understanding of the layers needed and there functions in order to achieve network communication.
example
The OSI model is one example of this
this protocol is also known as
IEEE 802.3
this is a number that refers to the committee that is responsible for approving and maintaining the standard
what is the
ethernet protocol
also known as
a protocol may use this so that a message is structured so that it may be read by any device
describe the purpose of a
message format
that may be used by a protocol
describe
Ethernet
this protocol is concerned with the delivery of a message from one NIC to another NIC
what actions take place when an ethernet frame reaches the destination P.C
When a pc receives an ethernet frame the Network Interface Card (NIC) will look at the destination address and determine if it was in fact addressed to them if it is then the rest of the frame will be read otherwise the ethernet frame will be discarded in essence the pc never receives the message
what two resons might we use a
layered model
- Assisting in protocol design since the information the protocol receives will be determined by the protocol above and the interfaces upon data received and sent will be decided by the protocol above and below repetitively
- Enables changing and using different technologies on any layer without affecting communication
describe the
Presentation layer
of the
OSI model
this layer of the OSI model is concerned with:
the formatting of data (from 1s and 0s vice versa) and encryption
this protocol manages individual connections and ensures that messages are delivered reliably and may also use other features such as flow control
describe
Transmission control protocol (TCP)
what is a
protocol suite
this is a grouping of protocols that as a whole allow communication over a network.
example
The TCP/IP suite is one example
this is a model made of stacks of categories, which as a whole describe all the categories needed in order to acheive communication
what is the
TCP/IP model
what are 6
characteristics that a protocol may include
this may include:
- message format
- message size
- timing
- encoding
- encapsulation
- message pattern
an ethernet standard would be similar to 802.3 100BASE-T where.
- 802.3 - refers to the protocol and the committee that overseases it
- 100 - is the speed of the standard in Mbps
- BASE - specifies that it is a baseband transmission
- T - specifies that it uses twisted pair cabling
when a new standard for ethernet is defined how is the new name for the standard formatted.
give an example and describe each of the pieces of information
this layer of the OSI model is concerned with:
establishing, maintaining, synchronizing and terminating sessions between end-user applications
describe the
Session layer
of the
OSI model
this protocol governs how a web server and a web client interact such as the content of a message including any headers and also the structure of the message
describe
Hypertext transfer protocol (HTTP)
the layers this holds are:
- Application
- Presentation
- Session
- Transport
- Network
- Data link
- Physical
what are the 7 layers of the
OSI model
what does the
ethernet protocol
determine
this determines how data is formatted and then transmitted over the network media
- Assisting in protocol design since the information the protocol receives will be determined by the protocol above and the interfaces upon data received and sent will be decided by the protocol above and below repetitively
- Enables changing and using different technologies on any layer without affecting communication
what two resons might we use a
layered model
this protocol is maintained by
Institute of Electrical and Electronics Engineers (IEEE)
who maintains the
ethernet protocol
this layer of the OSI model is concerned with:
the physical media upon which the data will travel through
describe the
physical layer
of the
OSI model
this layer of the OSI model is concerned with:
the network Addressing and routing of data
describe the
network layer
of the
OSI model
this is a grouping of protocols that as a whole allow communication over a network.
example
The TCP/IP suite is one example
what is a
protocol suite
a protocol may implement this so that their are rules on how many bits can be sent at a time. this also ensures that if needed this can be adjusted depending upon the current situation
describe the purpose of a
timing
that may be used by a protocol
describe the purpose of a
message format
that may be used by a protocol
a protocol may use this so that a message is structured so that it may be read by any device