17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
CS6250 Computer Networks Exam 1
COMPREHENSIVE QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED
ANSWERS!!
Save
Terms in this set (71)
Each protocol layer offers different services. Some
advantages are scalability, flexibility, and ease of
adding / removing components making it easier for
cost-effective implementations. Disadvantages
What are advantages and
include: some layers functionality depends on the
disadvantages of a
information from the other layer and violates the goal
layered architecture?
of layer separation; one layer may duplicate lower
layer functionalities; overhead both in computation
and in message headers caused by abstraction
barriers between layers.
The OSI model and the 5-layered Internet Model
have many of the same layers, with the difference
What are the differences
being three of the layers are combined in the 5-
and similarities of the OSI
layered model. Specifically the five-layer model
model and five-layered
combines the application, presentation, and session
Internet model?
layers from the OSI model into a single application
layer.
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 1/31
,17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
A network socket is a software structure within a
network node of a computer network that serves as
an endpoint for sending and receiving data across the
network. The structure and properties of a socket are
defined by an application programming interface
(API) for the networking architecture. Sockets are
created only during the lifetime of a process of an
application running in the
What are sockets? node.https://en.wikipedia.org/wiki/Network_socket."A
process sends messages into, and receives messages
from, the network through a software interface called
a socket. Let's consider an analogy to help us
understand processes and sockets. A process is
analogous to a house and its socket is analogous to
its door....a socket is the interface between the
application layer and the transport layer within a host."
- Kurose and Ross, 2.1
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 2/31
,17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
Application layer: Service, Interface, Protocol. Ex:
Turn on your smartphone and look at the list of apps.
(HTTP, SMTP, FTP, DNS)
Presentation layer: Plays intermediate role of
formatting the information received from the layer
below and delivering it to the application layer. Ex:
converting big endian to little endian.
Session layer: Responsible for the mechanism that
manages the different transport streams that belong
to the same session between end-user and
application process. Ex: teleconference app, it is
responsible for tying together audio and video
streaming.
Transport layer: Responsible for the end-to-end
communication between end hosts. 2 transport
protocols, TCP and UDP. TCP includes a connection-
oriented service to the applications that are running
on the layer above, guaranteed delivery of the
application-layer messages, flow control, and
Describe each layer of the congestion control mechanism. UDP provides a
OSI model. connectionless, best-effort service to the applications
that are running in the layer above without reliability,
flow, or congestion control. In this layer the packet is
called a segment.
Network layer: This layer is responsible for moving the
packet of information, called a datagram, from one
host to another. The network layer is responsible for
delivering the datagram to the Transport layer on the
destination host. In this layer there are the IP Protocol
and the routing tables.
Data Link layer: Packets are referred to as frames.
Examples include: ethernet, ppp, wifi. Responsible for
moving the frames from one node (host or router) to
the next node. Services offered by the data link layer
protocol include reliable delivery (transmission of the
data from one transmitting node, across one link, to
the receiving node.
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 3/31
, 17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
Physical layer: This layer is the actual hardware
responsible to transfer bits within a frame between
two nodes c
Application: NFS, DNS, SNMP, ftp, rcp, telnet, HTTP
Provide examples of
Transport: TCP, UDP
popular protocols at each
Internet: IP, ARP, ICMP
layer of the five-layered
Data Link: PPP, IEEE 802.2, Ethernet
Internet model.
Physical Network: Token Ring, RS-232
What is encapsulation, and Encapsulation is when data (called a header) is
how is it used in a layered appended to the packet through each layer to signify
model? its on the correct path to the destination host.
A design choice that shaped the current internet
architecture. It states the network core should be
simple and minimal, while the end systems should
carry the intelligence. Network functions should be
simple and essential commonly used functions so any
What is the end-to-end
host can utilize the service and higher form functions
(e2e) principle?
should be built into the application itself. Lower level
layers should be independent and free to perform
only their designed function and the higher-level
layers deal with the more intricate functions that deal
with the specific application.
Violations include firewalls and traffic filters. Firewalls
violate because they are intermediate devices that are
operated between two end hosts and they can drop
the end host communications. Network Address
What are the examples of Translation (NAT) boxes are also a violation because it
a violation of e2e uses the single public IP address and distributes a new
principle? IP scheme to the hosts connected to it to route data
through re-writing the header info to route to the
correct destination host. NAT boxes are a violation
because they are not globally addressable or
routable.
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 4/31
CS6250 Computer Networks Exam 1
COMPREHENSIVE QUESTIONS AND VERIFIED
ANSWERS 2025(GRADED A+) DETAILED
ANSWERS!!
Save
Terms in this set (71)
Each protocol layer offers different services. Some
advantages are scalability, flexibility, and ease of
adding / removing components making it easier for
cost-effective implementations. Disadvantages
What are advantages and
include: some layers functionality depends on the
disadvantages of a
information from the other layer and violates the goal
layered architecture?
of layer separation; one layer may duplicate lower
layer functionalities; overhead both in computation
and in message headers caused by abstraction
barriers between layers.
The OSI model and the 5-layered Internet Model
have many of the same layers, with the difference
What are the differences
being three of the layers are combined in the 5-
and similarities of the OSI
layered model. Specifically the five-layer model
model and five-layered
combines the application, presentation, and session
Internet model?
layers from the OSI model into a single application
layer.
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 1/31
,17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
A network socket is a software structure within a
network node of a computer network that serves as
an endpoint for sending and receiving data across the
network. The structure and properties of a socket are
defined by an application programming interface
(API) for the networking architecture. Sockets are
created only during the lifetime of a process of an
application running in the
What are sockets? node.https://en.wikipedia.org/wiki/Network_socket."A
process sends messages into, and receives messages
from, the network through a software interface called
a socket. Let's consider an analogy to help us
understand processes and sockets. A process is
analogous to a house and its socket is analogous to
its door....a socket is the interface between the
application layer and the transport layer within a host."
- Kurose and Ross, 2.1
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 2/31
,17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
Application layer: Service, Interface, Protocol. Ex:
Turn on your smartphone and look at the list of apps.
(HTTP, SMTP, FTP, DNS)
Presentation layer: Plays intermediate role of
formatting the information received from the layer
below and delivering it to the application layer. Ex:
converting big endian to little endian.
Session layer: Responsible for the mechanism that
manages the different transport streams that belong
to the same session between end-user and
application process. Ex: teleconference app, it is
responsible for tying together audio and video
streaming.
Transport layer: Responsible for the end-to-end
communication between end hosts. 2 transport
protocols, TCP and UDP. TCP includes a connection-
oriented service to the applications that are running
on the layer above, guaranteed delivery of the
application-layer messages, flow control, and
Describe each layer of the congestion control mechanism. UDP provides a
OSI model. connectionless, best-effort service to the applications
that are running in the layer above without reliability,
flow, or congestion control. In this layer the packet is
called a segment.
Network layer: This layer is responsible for moving the
packet of information, called a datagram, from one
host to another. The network layer is responsible for
delivering the datagram to the Transport layer on the
destination host. In this layer there are the IP Protocol
and the routing tables.
Data Link layer: Packets are referred to as frames.
Examples include: ethernet, ppp, wifi. Responsible for
moving the frames from one node (host or router) to
the next node. Services offered by the data link layer
protocol include reliable delivery (transmission of the
data from one transmitting node, across one link, to
the receiving node.
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 3/31
, 17/06/2025, 11:10 CS6250 Computer Networks Exam 1 COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS 2025(GRADED A+) DETAILE…
Physical layer: This layer is the actual hardware
responsible to transfer bits within a frame between
two nodes c
Application: NFS, DNS, SNMP, ftp, rcp, telnet, HTTP
Provide examples of
Transport: TCP, UDP
popular protocols at each
Internet: IP, ARP, ICMP
layer of the five-layered
Data Link: PPP, IEEE 802.2, Ethernet
Internet model.
Physical Network: Token Ring, RS-232
What is encapsulation, and Encapsulation is when data (called a header) is
how is it used in a layered appended to the packet through each layer to signify
model? its on the correct path to the destination host.
A design choice that shaped the current internet
architecture. It states the network core should be
simple and minimal, while the end systems should
carry the intelligence. Network functions should be
simple and essential commonly used functions so any
What is the end-to-end
host can utilize the service and higher form functions
(e2e) principle?
should be built into the application itself. Lower level
layers should be independent and free to perform
only their designed function and the higher-level
layers deal with the more intricate functions that deal
with the specific application.
Violations include firewalls and traffic filters. Firewalls
violate because they are intermediate devices that are
operated between two end hosts and they can drop
the end host communications. Network Address
What are the examples of Translation (NAT) boxes are also a violation because it
a violation of e2e uses the single public IP address and distributes a new
principle? IP scheme to the hosts connected to it to route data
through re-writing the header info to route to the
correct destination host. NAT boxes are a violation
because they are not globally addressable or
routable.
https://quizlet.com/1054977454/cs6250-computer-networks-exam-1-comprehensive-questions-and-verified-answers-2025graded-a-detailed-answers-… 4/31
