protocols and standards Flashcards
why are standards important
if the hardware doesn’t follow standards / common rules, the computer systems may not be able to interconnect together to create a network
what can manufacturers following different standards lead to
incompatible hardware, software
what are standards
provides a common international language that enables compatibility for all computer systems across the globe
what does the program do to transfer / receive data from a connection medium
pass the request through different layers
obtain an answer through different layers
why would one organize a network design in layers
it makes process less complex as it breaks down the process into separate modules
what does the protocol of a layer carry out
sequence of operations
adv of layers
easy to manage
greater understanding of each layer
common language for each layer
makes protocol design easier
what are packets
small groups that the data is broken up into when it is sent over the network
packets travel through the network to reach their final destination
what info does a data packet contain
small amount of data
destination of the packet
what is OSI model
Open systems interconnection model that contains 7 layers
what are the 7 layers of the OSI model
application
presentation
session
transport
network
data link
physical
describe application layer
performs various services for the application used by the end users
which protocol is used by application layer
HTTP
describe presentation layer
provides data format information, data compression information, data encryption information to the application
which protocol is used by presentation layer
PNG
