CS6250 - Computer Networks questions
with correct answers
What are advantages and disadvantages of a layered architecture? -
🔰CORRECT ANSWERS ✔✔Separation of concerns among logical
layers promotes flexibility, scalibility, and maintainability. Multiple
applications can reuse the components. It enables teams to work on
different parts with minimal dependencies on other teams
What are the similarities of the OSI model and five-layered Internet
model? - 🔰CORRECT ANSWERS ✔✔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? - 🔰CORRECT ANSWERS ✔✔OSI is a generic model
based on the functions of each layer. TCP is a protocol oriented
standard.
1 \\\\\\/ \\\\\\
45
,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? - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔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
2 \\\\\\/ \\\\\\
45
,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 - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔The network
layer is responsible for receiving frames from the data link layer,
and delivering them to their intended destinations among based on
3 \\\\\\/ \\\\\\
45
, 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 - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔The
presentation layer formats or translates data for the application
layer based on the syntax or semantics that the application accepts.
4 \\\\\\/ \\\\\\
45
with correct answers
What are advantages and disadvantages of a layered architecture? -
🔰CORRECT ANSWERS ✔✔Separation of concerns among logical
layers promotes flexibility, scalibility, and maintainability. Multiple
applications can reuse the components. It enables teams to work on
different parts with minimal dependencies on other teams
What are the similarities of the OSI model and five-layered Internet
model? - 🔰CORRECT ANSWERS ✔✔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? - 🔰CORRECT ANSWERS ✔✔OSI is a generic model
based on the functions of each layer. TCP is a protocol oriented
standard.
1 \\\\\\/ \\\\\\
45
,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? - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔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
2 \\\\\\/ \\\\\\
45
,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 - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔The network
layer is responsible for receiving frames from the data link layer,
and delivering them to their intended destinations among based on
3 \\\\\\/ \\\\\\
45
, 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 - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔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 - 🔰CORRECT ANSWERS ✔✔The
presentation layer formats or translates data for the application
layer based on the syntax or semantics that the application accepts.
4 \\\\\\/ \\\\\\
45
