Monitronic Success College.docx - Monitronic Success...

Monitronic Success
College
NAME :
SUBJECT : DCN 2070 -02 Data communication and networks
COURSE NAME : Diploma in Information Technology, level 6.
DUE DATE :

QUATION 1
a)Differences between Telecommunication and Data Communication
Data Communication
refers to the transmission of this digital data between two or more computers and a computer
network or data network is a telecommunications network that allows computers to exchange
data. Data communication is said to be local if communicating devices are in the same building
or a similarly restricted geographical area. Data communication is divided into components
namely as:
 Message
 Sender
 Receiver
 Medium
 Protocol
Telecommunication
Is the exchange of information over significant distances by electronic means and refers to all
type of voice, data and video transmission. There are few types of telecommunication networks:
the internet is the largest example of telecommunications network example includes:
 Corporate and academic wide area networks
 Telephone networks
 Cellular networks
 Police and fire communication system
 Taxi dispatch network
 Broadcast network
b) Data communication components
A communication system has following components:
1. Message
It is the information or data to be communicated and it can consist of text, numbers, pictures
sound or video or any combination of this scenario .
2. Sender
It is the device/ computer that generates and sends that message to be transmitted

3. Receiver
It is the device or computer that receives the message. The location of receiver computer is
generally different from the sender computer. The distance between the sender and the receiver
depends upon to the type of network used in between.
4. Medium
Is the channel or the physical path through which the message is carried from sender to the
receiver. The medium can be wired like twisted pair wire, coaxial cable, fiber optics cable and
many more
5. Protocols
It is the set of rules that govern the communication between the devices. Both the sender and the
receiver use the same protocol to communicate with each other.
Question 2
Comparison between ISO/OSI and TCP/IP
OSI(Open System Interconnection) TCP/IP(Transmission Control Protocol /
Internet Protocol)
1. OSI is a generic, protocol independent
standard, acting as a communication gateway
between the network and end user.
1. TCP/IP model is based on standard
protocols around which the Internet has
developed. It is a communication protocol,
which allows connection of hosts over a
network.
2. Transport Layer is Connection Oriented. 2. Transport Layer is both Connection
Oriented and Connection less.
3. OSI is a reference model around which the
networks are built. Generally it is used as a
guidance tool.