Computer networks-2

Question 1

Personal Area Network (PAN)

Answer 1

– It is the smallest network which is very personal to a user.
– This may include Bluetooth enabled devices or infra-red
enabled devices.
– PAN has connectivity range up to 10 meters.
– PAN may include wireless computer keyboard and mouse,
Bluetooth enabled headphones, wireless printers, and TV
remotes.

Question 2

Example of PAN

Answer 2

– Piconet
* It is Bluetooth-enabled Personal Area Network which may contain
up to 8 devices connected together in a master-slave fashion.

Question 3

Local Area Network (LAN)

Answer 3

– A computer network spanned inside a building and
operated under single administrative system is generally
termed as Local Area Network.
– It covers an organization offices, schools, colleges or
Universities.
– LAN provides a useful way of sharing the resources
between end users.
– The resources such as printers, scanners, and file servers
are easily shared among computers.
– LANs are composed of inexpensive networking and
routing equipment.
– LAN uses either Ethernet or Token-ring technology.
– LAN can be wired, wireless, or in both forms at once

Question 4

Metropolitan Area Network (MAN)

Answer 4

– It generally expands throughout a city.
– It can be in the form of Ethernet, Token-ring, ATM
(Asynchronous Transfer Mode), or Fiber Distributed Data
Interface (FDDI).
– Metro Ethernet is a service which is provided by ISPs
(Internet Service Providers).
– This network enables its users to expand their Local Area
Networks.
– For example, MAN can help an organization to connect
all of its offices in a city.
– Backbone of MAN is high-capacity and high-speed fiber
optics

Question 5

Wide Area Network (WAN)

Answer 5

– The Wide Area Network (WAN) covers a wide area which
may span across provinces and even a whole country.
– Generally, telecommunication networks are Wide Area
Network.
– These networks provide connectivity to MANs and LANs.
– Since they are equipped with very high speed backbone,
WANs use very expensive network equipment.
– WAN may use advanced technologies such as
Asynchronous Transfer Mode (ATM), Frame Relay, and
Synchronous Optical Network (SONET).

Question 6

Internetwork

Answer 6

– A network of networks is called an internetwork, or simply the
Internet.
– The Internet hugely connects all WANs and it can have connection to
LANs and Home networks.
– Internet uses TCP/IP protocol suite and uses IP as its addressing
protocol.
– Present day, Internet is widely implemented using IPv4. Because of
shortage of address spaces, it is gradually migrating from IPv4 to
IPv6.
– Internet enables its users to share and access enormous amount of
information worldwide.
– It provides services such as WWW, FTP, email services, audio, and
video streaming etc.
– Internet works on Client-Server model.

Question 7

Internet is serving many purposes and is
involved in many aspects of life. Some of
them are:

Answer 7

Web sites, E-mail, Instant Messaging, Blogging,
Social Media, Marketing, Resource Sharing,
Audio and Video Streaming.