Computer Science
Communication & Networking
Q: Why
do we use modem in telecommunication?
A: A
modem (Modulator-Demodulator) is used to convert digital signals from a
computer into analog signals for transmission over telephone lines and vice
versa. This is essential for internet connectivity, as traditional telephone
lines use analog signals.
Q: Why
do we use Bluetooth technology?
A:
Bluetooth is used for short-range wireless communication between electronic
devices. It allows devices like mobile phones, headphones, laptops, and
speakers to transfer data without cables, using low-power radio waves.
Q: Why
is client computer called a workstation?
A: A
client computer is called a workstation because it is used by an individual
user to perform daily tasks like document editing, browsing, and running
applications. It typically connects to a server in a network and requests
services.
Q: Why
is switch more intelligent than hub?
A: A
switch is considered more intelligent because it learns the MAC addresses of
connected devices and sends data only to the specific device it is intended
for. In contrast, a hub broadcasts data to all devices, which reduces
efficiency.
Q: Why
is router called an intelligent device?
A: A
router is called intelligent because it can determine the most efficient path
for data to travel between networks. It uses IP addresses and routing tables to
forward data packets to their destination across multiple networks.
Q: Why
do we use a repeater?
A: A
repeater is used in data communication to regenerate and amplify signals. It
helps extend the distance over which data can travel by boosting weak signals,
thus preventing signal loss in long-distance communication.
Q: Why
is an Ethernet card used?
A: An
Ethernet card, also known as a Network Interface Card (NIC), is used to connect
a computer to a wired local area network (LAN). It enables the computer to send
and receive data over the network using an Ethernet cable.
Q: Why
is a repeater used in every node of a Ring Topology?
A: In
a ring topology, each device is connected in a circular fashion. A repeater is
used at every node to regenerate the signal and pass it to the next device,
ensuring the signal remains strong throughout the loop.
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