Robyn Dunn

1. DIGITAL
COMMUNICATION
S SYSTEMSRobyn Dunn

2. PROTOCOLS, METHODS
AND DEVICES!
HTTP
 HTTP- HYPER TEXT TRANSFER
PROTOCOL
 This protocol is an application
protocol for distributed,
collaborative, hypermedia
information systems. This is the
foundation of data for the World
Wide Web.
 Hyper Text is structured in a way
that uses logical links between nodes
containing text.
WAP
 WAP- WIRELESS APPLICATION
PROTOCOL
 This is a technical standard for
accessing information over a mobile
wireless network. A WAP browser is
a web browser that allows mobile
devices like mobile phones to use the
protocol.
 Most modern handset internet
browsers now support full HTML
and do not need to use WAP.

3. PROTOCOLS, METHODS
AND DEVICES!
GSM
 GSM- GLOBAL SYSTEM FOR
MOBILE.
 This was developed by the European
Telecommunications Standards
Institute in order to describe
protocols for second generation
networks used by mobile phones.
 This standard was developed as a
replacement for first generation
analog cellular networks and was
optimized for full duplex voice
telephony.
3G
 3G- 3RD GENERATION
PROTOCOL.
 This is the 3rd generation of mobile
telecommunications technology. It is
based on a set of standards used for
mobile devices and services and
networks.
 3G finds the application with
wireless voice telephony, mobile
internet access, fixed wireless
internet access, video calls and
mobile TV.

4. PROTOCOLS, METHODS
AND DEVICES!
4G
This is the fourth
generation of mobile
telecommunications
succeeding 3G.
It provides mobile ultra-
broadband internet
access, for example
laptops with USB wireless
modems.
Even though 4G is
successful and is better
than 3G, there can be some
issues as many of the
upgrades were not built on
forward compatibility
GPRS
 GPRS- GENERAL PACKET RADIO
SERVICE.
 This is a packet oriented mobile data
service on the 2G and 3G cellular
communications system's global
system for mobile communications.
 GPRS usage is typically based on
volume of data transferred,
contrasting with circuit switched
data, which is usually billed per
minute of connection time.

5. PROTOCOLS, METHODS
AND DEVICES!
BLUETOOTH
 Bluetooth is a wireless
technology for exchanging data over
short distances from fixed and mobile
devices, and building personal
networks.
 It was invented by
telecom vendor Ericsson in 1994
and it was originally conceived as
a wireless alternative to data cables. It
can also to connect
to several devices, overcoming
problems of synchronization.
BROADBAND
 This refers to the wide
bandwidth characteristics of a
transmission medium and
its ability to transport
multiple signals and
traffic types simultaneously.
 In contrast, baseband describes a
communication system in
which information is
transported across a single channel.

6. PROTOCOLS,
METHODS AND DEVICES!
VoIP
 VoIP- VOICEOVER INTERNET
PROTOCOL.
 This is a methodology and group
of technologies for the delivery of voice
communications and
multimedia sessions over
internet Protocol networks, such as the
internet.
 Instead of being transmitted over a
circuit- switched network, however,
the digital information is packetized,
and transmission occurs as
Internet Protocol packet-switched
network.
FORUMS- METHODS
 An internet forum or message board
is
an online discussion site where peopl
e can hold conversations in the form
of posted messages. An example of
this is: The Sims forum can be
accessed on computers, tablets and
smartphones although there is
no specific mobile version.

7. METHODS
WEBBLOGS (BLOGS)
 A blog is a regularly updated website
or web page, typically one run by an
individual or small group, that is
written in an informal or
conversational style.
 An example of this is 'Perez-
Hilton.com', can
be accessed on computers, tablets
and smartphones.
Wikis
 A wiki is a web application which
allow people to add, modify or
delete content in
collaboration with others.
 An advantage of a wiki is they
are very informative and you can
further your knowledge on
almost any topic as
they become more popular.
A major disadvantage of this
is that not all of the information
is taken as reliable.

8. METHODS
EMAIL
 An email is a message distributed
by electronic means from one
computer user to one or more
recipients via a network.
 An example of this is google
mail, can be used on computers,
tablets and smartphones.
MMS
 MMS- MULTIMEDIA MESSAGING
SYSTEM
 Multimedia messaging service is a
way to send messages that
include multimedia content to and
from mobile phones.
 Like SMS, MMS is used on all
mobile devices however
some smartphones have
their own service for it's users.

9. METHODS
VIDEO CONFERENCING
 Video conferencing is the conduct of
a video conference by a set
of telecommunication technologies w
hich allow two or more locations to
communicate.
 An example of this is Skype, it can be
accessed on computers, tablets and
smartphones that have a forward-
facing camera.