CS6250 COMPUTER NETWORK EXAM 2
TEST BANK 200 PLUS QUESTIONS WITH
COMPLETE ANSWERS ACCURATE REVIEW
MATERIAL GRADED A+
⩥ What are the similarities of the OSI model and five-layered
Internet model?
Answer: They are both based on layered architecture.
The are comparable to each other - see image 1
Both are networking standards
⩥ What are the differences of the OSI model and five-layered
Internet model?
Answer: OSI is a generic model based on the functions of each
layer. TCP is a protocol oriented standard.
OSI uses 3 upper layers (application, presentation, and session)
while TCP just uses application.
Likewise, OSI uses 2 Lower layers (Physical and DataLink)
while TCP just uses Link
,⩥ What is a socket?
Answer: A socket is one endpoint of a two-way communication
link between two programs running on the network.
A socket is bound to a port number so that the TCP layer can
identify the application that data is destined to be sent to.
⩥ Physical Layer
Answer: The lowest, or first, layer of the OSI model. Protocols
in this layer generate and detect signals so as to transmit and
receive data over a network medium. These protocols also set
the data transmission rate and monitor data error rates, but do
not provide error correction.
The lowest layer of the OSI Model is concerned with electrically
or optically transmitting raw unstructured data bits across the
network from the physical layer of the sending device to the
physical layer of the receiving device. It can include
specifications such as voltages, pin layout, cabling, and radio
frequencies. At the physical layer, one might find "physical"
resources such as network hubs, cabling, repeaters, network
adapters or modems.
,⩥ OSI Data Link Layer
Answer: At the data link layer, directly connected nodes are used
to perform node-to-node data transfer where data is packaged
into frames. The data link layer also corrects errors that may
have occurred at the physical layer.
The data link layer encompasses two sub-layers of its own. The
first, media access control (MAC), provides flow control and
multiplexing for device transmissions over a network. The
second, the logical link control (LLC), provides flow and error
control over the physical medium as well as identifies line
protocols.
⩥ OSI Network Layer
Answer: The network layer is responsible for receiving frames
from the data link layer, and delivering them to their intended
destinations among based on the addresses contained inside the
frame. The network layer finds the destination by using logical
addresses, such as IP (internet protocol). At this layer, routers are
a crucial component used to quite literally route information
where it needs to go between networks.
⩥ OSI Transport Layer
, Answer: The transport layer manages the delivery and error
checking of data packets. It regulates the size, sequencing, and
ultimately the transfer of data between systems and hosts. One
of the most common examples of the transport layer is TCP or
the Transmission Control Protocol.
⩥ OSI Session Layer
Answer: The session layer controls the conversations between
different computers. A session or connection between machines
is set up, managed, and termined at layer 5. Session layer
services also include authentication and reconnections.
⩥ OSI Presentation Layer
Answer: The presentation layer formats or translates data for the
application layer based on the syntax or semantics that the
application accepts. Because of this, it at times also called the
syntax layer. This layer can also handle the encryption and
decryption required by the application layer.
⩥ OSI Application Layer
Answer: At this layer, both the end user and the application layer
interact directly with the software application. This layer sees
network services provided to end-user applications such as a
web browser or Office 365. The application layer identifies
TEST BANK 200 PLUS QUESTIONS WITH
COMPLETE ANSWERS ACCURATE REVIEW
MATERIAL GRADED A+
⩥ What are the similarities of the OSI model and five-layered
Internet model?
Answer: They are both based on layered architecture.
The are comparable to each other - see image 1
Both are networking standards
⩥ What are the differences of the OSI model and five-layered
Internet model?
Answer: OSI is a generic model based on the functions of each
layer. TCP is a protocol oriented standard.
OSI uses 3 upper layers (application, presentation, and session)
while TCP just uses application.
Likewise, OSI uses 2 Lower layers (Physical and DataLink)
while TCP just uses Link
,⩥ What is a socket?
Answer: A socket is one endpoint of a two-way communication
link between two programs running on the network.
A socket is bound to a port number so that the TCP layer can
identify the application that data is destined to be sent to.
⩥ Physical Layer
Answer: The lowest, or first, layer of the OSI model. Protocols
in this layer generate and detect signals so as to transmit and
receive data over a network medium. These protocols also set
the data transmission rate and monitor data error rates, but do
not provide error correction.
The lowest layer of the OSI Model is concerned with electrically
or optically transmitting raw unstructured data bits across the
network from the physical layer of the sending device to the
physical layer of the receiving device. It can include
specifications such as voltages, pin layout, cabling, and radio
frequencies. At the physical layer, one might find "physical"
resources such as network hubs, cabling, repeaters, network
adapters or modems.
,⩥ OSI Data Link Layer
Answer: At the data link layer, directly connected nodes are used
to perform node-to-node data transfer where data is packaged
into frames. The data link layer also corrects errors that may
have occurred at the physical layer.
The data link layer encompasses two sub-layers of its own. The
first, media access control (MAC), provides flow control and
multiplexing for device transmissions over a network. The
second, the logical link control (LLC), provides flow and error
control over the physical medium as well as identifies line
protocols.
⩥ OSI Network Layer
Answer: The network layer is responsible for receiving frames
from the data link layer, and delivering them to their intended
destinations among based on the addresses contained inside the
frame. The network layer finds the destination by using logical
addresses, such as IP (internet protocol). At this layer, routers are
a crucial component used to quite literally route information
where it needs to go between networks.
⩥ OSI Transport Layer
, Answer: The transport layer manages the delivery and error
checking of data packets. It regulates the size, sequencing, and
ultimately the transfer of data between systems and hosts. One
of the most common examples of the transport layer is TCP or
the Transmission Control Protocol.
⩥ OSI Session Layer
Answer: The session layer controls the conversations between
different computers. A session or connection between machines
is set up, managed, and termined at layer 5. Session layer
services also include authentication and reconnections.
⩥ OSI Presentation Layer
Answer: The presentation layer formats or translates data for the
application layer based on the syntax or semantics that the
application accepts. Because of this, it at times also called the
syntax layer. This layer can also handle the encryption and
decryption required by the application layer.
⩥ OSI Application Layer
Answer: At this layer, both the end user and the application layer
interact directly with the software application. This layer sees
network services provided to end-user applications such as a
web browser or Office 365. The application layer identifies
