It is a ppt presentation based on computer networks description.

5.  Security Concerns.
 Virus and Malware.
 LackofRobustness.
 NeedsAn EfficientHandler.
 LackofIndependence.

6. LAN
• Local Area Network covers the office or a big factory
area. The maximum limit is 10 Km in size.
MAN
• Metropolitan Area Network covers a city. The
maximum limit is 100 Km in size.
WAN
• Wide Area Network covers the entire world. It can
contain a group of LANs connected with each other.