Chapter 1 Data Comm
What is Business data communications ? - ANS-Is the movement of information from one
computer application on one computer to another application on another computer by means of
electrical or optical transmission systems.
What are some of the ways in which computer networks are used in large businesses ? - ANS-A
store large retail store can use a network to store vital information and share it with employees
What are some of the ways in which small businesses can benefit from computer networks ? -
ANS-Resource sharing , each employee can share printers and important information can be
stored and shared within the network.
What is packetization? - ANS-Is the process of breaking down user data into small segments
and packaging these segments appropriately so that they can be delivered and reassembled
across the network.
Why is packetization useful in business data communications ? - ANS-- Brings ease of
transportation of data
- Eliminates single point of failure in Business comm.
- " is the process of breaking down user data into small segments and packetizing these
segments to deliver across network. "
What are some some of the factors that make packet switching more complex technologically
than traditional phone circuits (circuit switching ) ? - ANS-Instead of sending large amounts of
information the user packet switching allows providers to average out the user from all users.
What is layering ? - ANS-Is the practice of arranging functionality of components in a system in
a hierarchical manner such that lower layers provide functions and services that support the
functions and services of higher layers.
why is layering useful in organizations? - ANS-Most organizations are layered with each layer
given well defined goals and layering allows for extensive coordination and monitoring to reach
those goals.
What are the five layers of the TCP / IP model? - ANS-The five layers are physical , data link ,
network , Transport , and Application .
What are the primary functions of each layer in the TCP / IP model ? - ANS-Physical layer :
signaling , Datalink : error control , Network : Identify location destination , Transport:
segmentation and reassembly of the packet , Application : User needs .
What is Business data communications ? - ANS-Is the movement of information from one
computer application on one computer to another application on another computer by means of
electrical or optical transmission systems.
What are some of the ways in which computer networks are used in large businesses ? - ANS-A
store large retail store can use a network to store vital information and share it with employees
What are some of the ways in which small businesses can benefit from computer networks ? -
ANS-Resource sharing , each employee can share printers and important information can be
stored and shared within the network.
What is packetization? - ANS-Is the process of breaking down user data into small segments
and packaging these segments appropriately so that they can be delivered and reassembled
across the network.
Why is packetization useful in business data communications ? - ANS-- Brings ease of
transportation of data
- Eliminates single point of failure in Business comm.
- " is the process of breaking down user data into small segments and packetizing these
segments to deliver across network. "
What are some some of the factors that make packet switching more complex technologically
than traditional phone circuits (circuit switching ) ? - ANS-Instead of sending large amounts of
information the user packet switching allows providers to average out the user from all users.
What is layering ? - ANS-Is the practice of arranging functionality of components in a system in
a hierarchical manner such that lower layers provide functions and services that support the
functions and services of higher layers.
why is layering useful in organizations? - ANS-Most organizations are layered with each layer
given well defined goals and layering allows for extensive coordination and monitoring to reach
those goals.
What are the five layers of the TCP / IP model? - ANS-The five layers are physical , data link ,
network , Transport , and Application .
What are the primary functions of each layer in the TCP / IP model ? - ANS-Physical layer :
signaling , Datalink : error control , Network : Identify location destination , Transport:
segmentation and reassembly of the packet , Application : User needs .
