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Server: This is a powerful system or device that provides services, resources or data to other
computers over a network.
Internet: This is a vast and globally connected network of networks that enables data exchange
and communication between billions of devices worldwide.

Intranet: An intranet is a secured internal network available only to members of a specific
organisation, usually its employees.
URL: Uniform Resource Locator (URL) is a unique address used to identify and access specific

resources on the Internet.

PURE
Tim Bernars-Lee, a British computer expert, designed the first website in the
year 1991. FACT

ISP: An Internet Service Provider (ISP) is an organisation that offers services for accessing,

using or participating in the Internet.

IP address: This is unique number assigned to every device connected to the Internet. It helps
identify computers, smartphones, servers and more.

DNS: Domain Name System (DNS) converts website names into machine-readable IP
addresses. It allows users to access websites using simple names instead of numbers.

Network bandwidth: This refers to the amount of data that can be transmitted across a network
in a given time, usually measured per second.

PURE

The Internet is controlled by 7.5 crore servers. FACT

NETWORK DEVICES

There are various devices used in a network. These include:
Network Interface Card (NIC): A device attached to a computer
that enables communication over a network. The NIC contains
a ROM chip that has a unique number called the Media Access
Control (MAC) address, identifies the computer on the network.

Modem: A device that allows computers and other devices to connect to the
internet. It converts digital data into analog signals for transmission over
telephone lines and vice versa.

Networks Around Us 9