OSI MODEL Flashcards
OSI is
open systems interconnection
ISO developed OSI which allows connectivity with most devices
most networks will look to OSI
ISO is
international standards organisation
NETWORK PROTOCOL is
a set of well-defined rules
used to support communication over the internet or intranet
INTERNET PROTOCOLS are
POP3
IMAP
SMTP
OSI MODEL is
physical data network transport session presentation application
OSI PHYSICAL
cabling & network interface
transmission of binary data
defines electrical characteristics
OSI DATA layer
switching packets
media access
ensures the transmitted bits are received in a reliable way
OSI NETWORK layer
routing
determining the best path
routes data frames through a network
OSI TRANSPORT layer
end to end transport services
supports the transmission of multiple streams from a single computer
network transparent data transfer and transmission protocols
OSI SESSION layer
application session management
provides an open communications path with the other system
telnet is an example -allows for remote login
OSI PRESENTATION layer
syntax & semantics layer
the bulk of work done at presentation layer is interpretation of data
OSI APPLICATION layer
software app layer
provides network services to application programs
email, file transfer are examples
TCP/IP is
Transmission Control Protocol/internet protocol
four layers, some of which correlate roughly to OSI
OSI pneumonic
Please Do Not Throw Sausage Pizza Away
OSI vs TCP/IP
OSI APS = TCP/IP Application
OSI T = TCP/IP Transport
OSI N = Internet
OSI PD = TCP/IP Network Access
