ITN 100 - Exam 1 WITH ANSWERS
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How can data communication networks affect businesses? -
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CORRECT ANSWERS ✔✔by being the foundations for distributed
|\ |\ |\ |\ |\ |\ |\ |\
systems in which information system applications are divided
|\ |\ |\ |\ |\ |\ |\ |\
among a network of computers. They facilitate more efficient use of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
computers and improve the day-to-day control of a business by
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
providing faster information flow, aiding strategic competitive
|\ |\ |\ |\ |\ |\ |\
advantage. They also provide message transfer services to allow
|\ |\ |\ |\ |\ |\ |\ |\ |\
computer users to talk to one another via electronic mail.
|\ |\ |\ |\ |\ |\ |\ |\ |\
Discuss three important applications of data communication
|\ |\ |\ |\ |\ |\ |\
networks in business and personal use. - CORRECT ANSWERS
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✔✔email, videoconferencing, and the Internet
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How do LANs differ from WANs, and BNs? - CORRECT ANSWERS
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✔✔A Local Area Network (LAN) is a group of microcomputers or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
terminals located in the same general area. A Backbone Network
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
(BN) is a large central network that connects most everything on a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
single company site. A Metropolitan Area Network (MAN)
|\ |\ |\ |\ |\ |\ |\ |\
encompasses a city or county area. A Wide Area Network (WAN) |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
spans cities, states, or national boundaries. Typically, MANs and
|\ |\ |\ |\ |\ |\ |\ |\ |\
WANs used leased facilities, while LANs and BNs are often located
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
internally in an organization and used owned facilities.
|\ |\ |\ |\ |\ |\ |\
,What is a circuit? - CORRECT ANSWERS ✔✔The pathway through
|\ |\ |\ |\ |\ |\ |\ |\ |\
which messages travel
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What is a client? - CORRECT ANSWERS ✔✔the input or output
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
hardware device at the other end of a communication circuit
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What is a server? - CORRECT ANSWERS ✔✔stores data or software
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
that can be accessed by the clients, or remote users of a hardware
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
input or output device
|\ |\ |\
Why are network layers important? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔Communication networks are often broken into a series of |\ |\ |\ |\ |\ |\ |\ |\ |\
layers, each of which can be defined separately, to enable vendors to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
develop software and hardware that can work together in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
overall network. These layers enable simplicity in development and
|\ |\ |\ |\ |\ |\ |\ |\ |\
also in the comprehension of complex networks. In the end, the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
strategy of using more simplistic network layers allows vastly
|\ |\ |\ |\ |\ |\ |\ |\ |\
different kinds of equipment to be able to have connectivity over a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
common platform or network, using protocols and standards that
|\ |\ |\ |\ |\ |\ |\ |\ |\
are applicable to each narrow slice of the network.
|\ |\ |\ |\ |\ |\ |\ |\
Describe the seven layers in the OSI network model and what they
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
do. - CORRECT ANSWERS ✔✔- The application layer is the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
application software used by the network user. |\ |\ |\ |\ |\ |\ |\
,- The presentation layer formats the data for presentation to the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
user by accommodating different interfaces on different terminals or
|\ |\ |\ |\ |\ |\ |\ |\
computers so the application program need not worry about them.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
- The session layer is responsible for initiating, maintaining, and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
terminating each logical session between end users. |\ |\ |\ |\ |\ |\ |\
- The transport layer deals with end-to-end issues, such as
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
procedures for entering and departing from the network, by
|\ |\ |\ |\ |\ |\ |\ |\ |\
establishing, maintaining, and terminating logical connections for
|\ |\ |\ |\ |\ |\ |\
the transfer of data between the original sender and the final
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
destination of the message. |\ |\ |\
- The network layer takes the message generated by the application
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
layer and if necessary, breaks it into several smaller messages. It
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
then addresses the message(s) and determines their route through
|\ |\ |\ |\ |\ |\ |\ |\ |\
the network, and records message accounting information before
|\ |\ |\ |\ |\ |\ |\ |\
passing it to the data link layer. |\ |\ |\ |\ |\ |\ |\
- The data link layer formats the message to indicate where it starts
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and ends, decides when to transmit it over the physical media, and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
detects and corrects any errors that occur in transmission.
|\ |\ |\ |\ |\ |\ |\ |\ |\
- The physical layer is the physical connection between the sender
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and receiver, including the hardware devices (e.g., computers,
|\ |\ |\ |\ |\ |\ |\ |\
terminals, and modems) and physical media (e.g., cables, and
|\ |\ |\ |\ |\ |\ |\ |\ |\
satellites).
, Describe the five layers in the Internet network model and what
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
they do. - CORRECT ANSWERS ✔✔- The application layer is the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
application software used by the network user. |\ |\ |\ |\ |\ |\ |\
- The transport layer deals with end-to-end issues, such as
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
procedures for entering and departing from the network, by
|\ |\ |\ |\ |\ |\ |\ |\ |\
establishing, maintaining, and terminating logical connections for |\ |\ |\ |\ |\ |\ |\
the transfer of data between the original sender and the final
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
destination of the message. |\ |\ |\ |\
- The network layer takes the message generated by the application
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
layer and if necessary, breaks it into several smaller messages. It
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
then addresses the message(s) and determines their route through
|\ |\ |\ |\ |\ |\ |\ |\ |\
the network, and records message accounting information before
|\ |\ |\ |\ |\ |\ |\ |\
passing it to the data link layer.
|\ |\ |\ |\ |\ |\ |\
- The data link layer formats the message to indicate where it starts
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and ends, decides when to transmit it over the physical media, and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
detects and corrects any errors that occur in transmission.
|\ |\ |\ |\ |\ |\ |\ |\ |\
- The physical layer is the physical connection between the sender
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and receiver, including the hardware devices (e.g., computers,
|\ |\ |\ |\ |\ |\ |\ |\
terminals, and modems) and physical media (e.g., cables, and
|\ |\ |\ |\ |\ |\ |\ |\ |\
satellites).
Explain how a message is transmitted from one computer to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
another using layers. - CORRECT ANSWERS ✔✔- The application
|\ |\ |\ |\ |\ |\ |\ |\ |\
layer is the application software used by the network user.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
|\ |\ |\ |\ |\ |\
How can data communication networks affect businesses? -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔by being the foundations for distributed
|\ |\ |\ |\ |\ |\ |\ |\
systems in which information system applications are divided
|\ |\ |\ |\ |\ |\ |\ |\
among a network of computers. They facilitate more efficient use of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
computers and improve the day-to-day control of a business by
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
providing faster information flow, aiding strategic competitive
|\ |\ |\ |\ |\ |\ |\
advantage. They also provide message transfer services to allow
|\ |\ |\ |\ |\ |\ |\ |\ |\
computer users to talk to one another via electronic mail.
|\ |\ |\ |\ |\ |\ |\ |\ |\
Discuss three important applications of data communication
|\ |\ |\ |\ |\ |\ |\
networks in business and personal use. - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔email, videoconferencing, and the Internet
|\ |\ |\ |\
How do LANs differ from WANs, and BNs? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔A Local Area Network (LAN) is a group of microcomputers or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
terminals located in the same general area. A Backbone Network
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
(BN) is a large central network that connects most everything on a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
single company site. A Metropolitan Area Network (MAN)
|\ |\ |\ |\ |\ |\ |\ |\
encompasses a city or county area. A Wide Area Network (WAN) |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
spans cities, states, or national boundaries. Typically, MANs and
|\ |\ |\ |\ |\ |\ |\ |\ |\
WANs used leased facilities, while LANs and BNs are often located
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
internally in an organization and used owned facilities.
|\ |\ |\ |\ |\ |\ |\
,What is a circuit? - CORRECT ANSWERS ✔✔The pathway through
|\ |\ |\ |\ |\ |\ |\ |\ |\
which messages travel
|\ |\ |\
What is a client? - CORRECT ANSWERS ✔✔the input or output
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
hardware device at the other end of a communication circuit
|\ |\ |\ |\ |\ |\ |\ |\ |\
What is a server? - CORRECT ANSWERS ✔✔stores data or software
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
that can be accessed by the clients, or remote users of a hardware
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
input or output device
|\ |\ |\
Why are network layers important? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔Communication networks are often broken into a series of |\ |\ |\ |\ |\ |\ |\ |\ |\
layers, each of which can be defined separately, to enable vendors to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
develop software and hardware that can work together in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
overall network. These layers enable simplicity in development and
|\ |\ |\ |\ |\ |\ |\ |\ |\
also in the comprehension of complex networks. In the end, the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
strategy of using more simplistic network layers allows vastly
|\ |\ |\ |\ |\ |\ |\ |\ |\
different kinds of equipment to be able to have connectivity over a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
common platform or network, using protocols and standards that
|\ |\ |\ |\ |\ |\ |\ |\ |\
are applicable to each narrow slice of the network.
|\ |\ |\ |\ |\ |\ |\ |\
Describe the seven layers in the OSI network model and what they
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
do. - CORRECT ANSWERS ✔✔- The application layer is the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
application software used by the network user. |\ |\ |\ |\ |\ |\ |\
,- The presentation layer formats the data for presentation to the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
user by accommodating different interfaces on different terminals or
|\ |\ |\ |\ |\ |\ |\ |\
computers so the application program need not worry about them.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
- The session layer is responsible for initiating, maintaining, and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
terminating each logical session between end users. |\ |\ |\ |\ |\ |\ |\
- The transport layer deals with end-to-end issues, such as
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
procedures for entering and departing from the network, by
|\ |\ |\ |\ |\ |\ |\ |\ |\
establishing, maintaining, and terminating logical connections for
|\ |\ |\ |\ |\ |\ |\
the transfer of data between the original sender and the final
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
destination of the message. |\ |\ |\
- The network layer takes the message generated by the application
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
layer and if necessary, breaks it into several smaller messages. It
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
then addresses the message(s) and determines their route through
|\ |\ |\ |\ |\ |\ |\ |\ |\
the network, and records message accounting information before
|\ |\ |\ |\ |\ |\ |\ |\
passing it to the data link layer. |\ |\ |\ |\ |\ |\ |\
- The data link layer formats the message to indicate where it starts
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and ends, decides when to transmit it over the physical media, and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
detects and corrects any errors that occur in transmission.
|\ |\ |\ |\ |\ |\ |\ |\ |\
- The physical layer is the physical connection between the sender
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and receiver, including the hardware devices (e.g., computers,
|\ |\ |\ |\ |\ |\ |\ |\
terminals, and modems) and physical media (e.g., cables, and
|\ |\ |\ |\ |\ |\ |\ |\ |\
satellites).
, Describe the five layers in the Internet network model and what
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
they do. - CORRECT ANSWERS ✔✔- The application layer is the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
application software used by the network user. |\ |\ |\ |\ |\ |\ |\
- The transport layer deals with end-to-end issues, such as
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
procedures for entering and departing from the network, by
|\ |\ |\ |\ |\ |\ |\ |\ |\
establishing, maintaining, and terminating logical connections for |\ |\ |\ |\ |\ |\ |\
the transfer of data between the original sender and the final
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
destination of the message. |\ |\ |\ |\
- The network layer takes the message generated by the application
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
layer and if necessary, breaks it into several smaller messages. It
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
then addresses the message(s) and determines their route through
|\ |\ |\ |\ |\ |\ |\ |\ |\
the network, and records message accounting information before
|\ |\ |\ |\ |\ |\ |\ |\
passing it to the data link layer.
|\ |\ |\ |\ |\ |\ |\
- The data link layer formats the message to indicate where it starts
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and ends, decides when to transmit it over the physical media, and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
detects and corrects any errors that occur in transmission.
|\ |\ |\ |\ |\ |\ |\ |\ |\
- The physical layer is the physical connection between the sender
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and receiver, including the hardware devices (e.g., computers,
|\ |\ |\ |\ |\ |\ |\ |\
terminals, and modems) and physical media (e.g., cables, and
|\ |\ |\ |\ |\ |\ |\ |\ |\
satellites).
Explain how a message is transmitted from one computer to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
another using layers. - CORRECT ANSWERS ✔✔- The application
|\ |\ |\ |\ |\ |\ |\ |\ |\
layer is the application software used by the network user.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
