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Unit 3- Computer Science
Topic 5
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Uses of communication protocols include:
HTTP
HTTPS
FTP
POP
IMAP
SMTP
TCP/IP
Explanation of
layers
in the
TCP
/
IP protocol stack
HTTP
(
Hypertext Transfer Protocol
) is used for accessing and receiving web pages via the
Internet
HTTPS
(
Secure HTTP
)
encrypts
information for
security
Websites like
banks
,
online shops
, and
social networks
use
HTTPS
for
secure data transmission
FTP
(File Transfer Protocol) is used for sending or retrieving files to or from an
FTP server
Emails are sent using
SMTP
protocol and accessed using
POP
or
IMAP
protocols
POP
(
Post-Office Protocol
) downloads messages to the
local device
, while
IMAP leaves messages on the server
SMTP
is an email protocol used for sending
emails
TCP
(
Transmission Control Protocol
) breaks up messages into
packets
and
reassembles
them at the other end
IP (Internet Protocol) routes
packets
from one
IP address
to another
The TCP/IP protocol stack consists of four layers:
Application
,
Transport
,
Internet
, and
Link
Different protocols operate at different layers for
communication
on the
Internet
Advantages of layers in protocols include
self-containment
and
interoperability
between
different hardware
and
software
Data packets
move through
layers
upon arrival for
processing and display
to the user
Plenary activity
involves identifying acronyms like HTTP, HTTPS, FTP, POP, IMAP, SMTP, TCP/IP