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7.2.12
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Created by
Qasim Khan
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Cards (14)
Protocol
An
agreed
set of
rules
that allow two devices to
communicate
Protocols
Can be for
wired
or
wireless
transfer
Protocols
Printer
communicating
with a computer
Phones
/Speakers communicating wirelessly by
Bluetooth
Webpages being
transferred
Hardware devices communicating with a
PC
Phone calls
Headphones
Protocols allow
easier
development one 'layer' at a time
Protocols allow
multiple
companies to work together
TCP/IP (
Transmission Control Protocol
/
Internet Protocol
)
Allows devices to
communicate
AND has error checking facilities to ensure all packets are
received
Is able to
create
and direct packets to the around a network and requests
replacement
copies if lost
TCP/IP
uses
FTP
SMTP
IMAP
HTTP
UDP
(User Datagram Protocol)
Has
no
error recovery services
When
streaming
, it is better to accept
occasional
lost packets and
temporary
dip in quality than
pausing
whilst replacement packets are requested
UDP uses
Online gaming
Streaming Media
HTTP (
Hypertext Transfer Protocol
)
Allows the transfer of
multimedia
webpages over the
internet
This is important as the
HTTP
protocol allows
multiple
different web browsers to display and
format
web pages as the original author intended
FTP
(File Transfer Protocol)
Allows the
transfer
of large files over a
network
Uses TCP/IP, so has
in-built
error checking and
re-transmission
requests as necessary
DHCP (Dynamic Host Configuration Protocol)
Assigns
IP addresses
to devices on a network
IP address uniquely
identifies
a device on a network
Allocated
when a device connects to the network
Single
sessions only, then reallocated
SMTP (Simple Mail Transfer Protocol)
Used to transfer emails between
internet
servers
IMAP (Internet Message Access Protocol)
Is used to upload/download
email
between the user's computer and an internet server
Emails are
accessible
anywhere
Emails are stored on the
server
instead of devices, which saves
storage
space