Mobile network is the network connecting devices without cable (wireless). Mobile computers, such as laptop, tablet, and hand held computers, were fastest growing segments.

1G  - 2.4 Kb/s
2G -  64 Kb/s
3G -  2 Mb/s
4G  - 100Mb/s
5G -  More than 1 G

Packet switching is used to transfer the information between computers and network

Malware treats or computer warms that replicates it by its own is called as virus

E-Governance made easier to collect their certificates through online,early days a person spend more time to collect the certificates and he have to directly many more difficulties. To avoid this bribery at office e-governance via Internet let a new path on all for ordinary man.

Features of Mobile Networks:
(i) Less consumption of power is used by mobile devices compared to a single transmitter or satellite since the cell towers are closer.
(ii) Huge capacity than a large transmitter, at single frequency can be used for different or many links as long as they are in different in cells.
(iii) As mobile phones are now heavilyused for data communication, the mobile network traffic is fully busy.

The common uses of computer network are
(i) Communication
(ii) Resource sharing
(iii) Information sharing

Internet is the most common resource shared everywhere.

A set of computers connected together for the purpose of sharing resources is called as computer network.