CS6250 Computer Networks Final Exam |
Questions and Answers | Download for a
Guaranteed A+ | Latest Guide 2025/2026
What is a socket?
- Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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
communication partners, resource availability, and synchronizes
communication.
5 Layer Internet Model - Application Layer - Correct Answer - As you
might have guessed, the Application layer is where applications requiring
network communications live. Examples of these applications include
email clients and web browsers. These applications use the Transport
Layer to send requests to connect to remote hosts.
5 Layer Internet Model - Transport Layer - Correct Answer - The
Transport layer establishes the connection between applications running
on different hosts. It uses TCP for reliable connections and UDP for fast
connections. It keeps track of the processes running in the applications
, above it by assigning port numbers to them and uses the Network layer
to access the TCP/IP network.
5 Layer Internet Model - Network Layer - Correct Answer - The Network
layer is responsible for creating the packets that move across the
network. It uses IP addresses to identify the packet's source and
destination.
5 Layer Internet Model - Data Link Layer - Correct Answer - The Data
Link layer is responsible for creating the frames that move across the
network. These frames encapsulate the packets and use MAC
addresses to identify the source and destination.
5 Layer Internet Model - Physical Layer - Correct Answer - The Physical
layer encodes and decodes the bits found in a frame and includes the
transceiver that drives and receives the signals on the network.
What is a distributed algorithm? - Correct Answer - A distributed
algorithm is one that is divided in several processors, so that some part
of the algorithm is run on one processor, other part in another processor,
and so forth.
Typically data is partitioned in advance so that each processor doesn't
need to wait for the output of another processor, but that is not always
feasable, and their is some form of communication between processors.
Questions and Answers | Download for a
Guaranteed A+ | Latest Guide 2025/2026
What is a socket?
- Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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
communication partners, resource availability, and synchronizes
communication.
5 Layer Internet Model - Application Layer - Correct Answer - As you
might have guessed, the Application layer is where applications requiring
network communications live. Examples of these applications include
email clients and web browsers. These applications use the Transport
Layer to send requests to connect to remote hosts.
5 Layer Internet Model - Transport Layer - Correct Answer - The
Transport layer establishes the connection between applications running
on different hosts. It uses TCP for reliable connections and UDP for fast
connections. It keeps track of the processes running in the applications
, above it by assigning port numbers to them and uses the Network layer
to access the TCP/IP network.
5 Layer Internet Model - Network Layer - Correct Answer - The Network
layer is responsible for creating the packets that move across the
network. It uses IP addresses to identify the packet's source and
destination.
5 Layer Internet Model - Data Link Layer - Correct Answer - The Data
Link layer is responsible for creating the frames that move across the
network. These frames encapsulate the packets and use MAC
addresses to identify the source and destination.
5 Layer Internet Model - Physical Layer - Correct Answer - The Physical
layer encodes and decodes the bits found in a frame and includes the
transceiver that drives and receives the signals on the network.
What is a distributed algorithm? - Correct Answer - A distributed
algorithm is one that is divided in several processors, so that some part
of the algorithm is run on one processor, other part in another processor,
and so forth.
Typically data is partitioned in advance so that each processor doesn't
need to wait for the output of another processor, but that is not always
feasable, and their is some form of communication between processors.
