This slide is meant for Class IX CBSE.

1. COMMUNICATION CHANNELS
WIRED/
CORD
WIRELESS/
CORDLESS

2. WIRED
TWISTED PAIR
CABLE
COAXIAL CABLE
OPTICAL FIBRE
CABLE
ETHERNET CABLE
WIRELESS
• RADIO WAVE
• MICROWAVE
• SATELLITE

3. WIRED NETWORKING

4. Twisted Pair Cable:
The twisted pair cable is a
transmission medium
consisting of two insulated
wires arranged in a regular
spiral pattern. Twisted pair
is the ordinary copper wire
that connects home and
many business computers
to the telephone company.

5. Coaxial Cable
Coaxial cables are a type of cable that is
used by cable TV and that is common for
data communications.

6. . Optical fiber Cable
Optical fiber (or "fiber optic") refers to the medium
and the technology associated with the transmission
of information as light pulses along a glass or plastic
strand or fiber. Optical fiber carries much more
information than conventional copper wire and is in
general not subject to electromagnetic interference
and the need to retransmit signals

7. Ethernet Cable
An Ethernet crossover cable is a type of
Ethernet cable used to connect computing
devices together directly. Ethernet cables
connect network devices such as modems,
routers, and adapters. They transmit data
using the Ethernet protocol. (See the bottom
for variations.)

8. WIRELESS NETWORKING
wireless fidelity

9. RADIO WAVE
Radio waves “transmit music, conversations,
pictures and data invisibly through the air, often
over million of miles. For example, a cell phone,
a baby monitor, a cordless phone, Am and FM
radio broadcasts, etc. use radio waves to
communicate.

10. MICROWAVE
Microwave radio transmission is widely used as an
alternative to coaxial cable. The receiver from
microwave signals are usually disc-shaped
antenna a few yards across, and are often seen
installed in business location or near private
homes.

11. Satellite
The use of satellites
in communication
system is very much
a fact of everyday life,
as it is evidenced by
the many homes or
cable TV operators
who are equipped
with antennas or
dishes used for the
reception of satellite
televisiton.

12. Satellite Transmission System