8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER
NETWORKS EXAM | ALL QUESTIONS AND
CORRECT ANSWERS | VERIFIED ANSWERS |
UPDATED VERSION
Terms in this set (140)
What are advantages and Each protocol layer offers different services.
disadvantages of a layered
architecture?
Layered Architecture Each protocol layer offers different services.
Layered Architecture Advantages - Scalability,
- Flexibility
- Ease of adding / removing components making it
easier for cost-effective implementations.
https://quizlet.com/1200889059/cs-6250-exam-actual-exam-2026-computer-networks-exam-all-questions-and-correct-answers-verified-answers-upda… 1/50
,8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
Layered Architecture Disadvantages - Some layers functionality depends on the
information from the other layer and violates the
goal of layer separation;
- One layer may duplicate lower layer
functionalities
- Overhead both in computation
- Overhead in message headers caused by
abstraction barriers between layers.
OSI and Five-Layered Internet model Many of the layers are the same
Similarities
OSI and Five-Layered Internet model - Three of the layers are combined in the 5-layered
Differences model.
- Specifically the five-layer model combines the
- Application
- Presentation
- Session layers
from the OSI model into a single Application layer.
https://quizlet.com/1200889059/cs-6250-exam-actual-exam-2026-computer-networks-exam-all-questions-and-correct-answers-verified-answers-upda… 2/50
,8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
What are sockets? - 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 node.
- ."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
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, 8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
Describe each layer of the OSI - Application layer: Service, Interface, Protocol.
model.
- Presentation layer: Plays intermediate role of
formatting the information received from the layer
below and delivering it to the application layer.
- Session layer: Responsible for the mechanism that
manages the different transport streams that
belong to the same session between end-user and
application process.
- Transport layer: Responsible for the end-to-end
communication between end hosts.
Network layer: This layer is responsible for moving
the packet of information, called a datagram, from
one host to another.
- Data Link layer: Responsible for moving the
frames from one node (host or router) to the next
node.
- Physical layer: This layer is the actual hardware
responsible to transfer bits within a frame between
two nodes c
OSI Model Application Layer - Service, Interface, Protocol.
Ex: Turn on your smartphone and look at the list of
apps. (HTTP, SMTP, FTP, DNS)
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CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER
NETWORKS EXAM | ALL QUESTIONS AND
CORRECT ANSWERS | VERIFIED ANSWERS |
UPDATED VERSION
Terms in this set (140)
What are advantages and Each protocol layer offers different services.
disadvantages of a layered
architecture?
Layered Architecture Each protocol layer offers different services.
Layered Architecture Advantages - Scalability,
- Flexibility
- Ease of adding / removing components making it
easier for cost-effective implementations.
https://quizlet.com/1200889059/cs-6250-exam-actual-exam-2026-computer-networks-exam-all-questions-and-correct-answers-verified-answers-upda… 1/50
,8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
Layered Architecture Disadvantages - Some layers functionality depends on the
information from the other layer and violates the
goal of layer separation;
- One layer may duplicate lower layer
functionalities
- Overhead both in computation
- Overhead in message headers caused by
abstraction barriers between layers.
OSI and Five-Layered Internet model Many of the layers are the same
Similarities
OSI and Five-Layered Internet model - Three of the layers are combined in the 5-layered
Differences model.
- Specifically the five-layer model combines the
- Application
- Presentation
- Session layers
from the OSI model into a single Application layer.
https://quizlet.com/1200889059/cs-6250-exam-actual-exam-2026-computer-networks-exam-all-questions-and-correct-answers-verified-answers-upda… 2/50
,8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
What are sockets? - 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 node.
- ."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/1200889059/cs-6250-exam-actual-exam-2026-computer-networks-exam-all-questions-and-correct-answers-verified-answers-upda… 3/50
, 8/21/26, 5:19 PM CS 6250 EXAM ACTUAL EXAM 2026 | COMPUTER NETWORKS EXAM | ALL QUESTIONS AND CORRECT ANSWERS | VERIFI…
Describe each layer of the OSI - Application layer: Service, Interface, Protocol.
model.
- Presentation layer: Plays intermediate role of
formatting the information received from the layer
below and delivering it to the application layer.
- Session layer: Responsible for the mechanism that
manages the different transport streams that
belong to the same session between end-user and
application process.
- Transport layer: Responsible for the end-to-end
communication between end hosts.
Network layer: This layer is responsible for moving
the packet of information, called a datagram, from
one host to another.
- Data Link layer: Responsible for moving the
frames from one node (host or router) to the next
node.
- Physical layer: This layer is the actual hardware
responsible to transfer bits within a frame between
two nodes c
OSI Model Application Layer - Service, Interface, Protocol.
Ex: Turn on your smartphone and look at the list of
apps. (HTTP, SMTP, FTP, DNS)
https://quizlet.com/1200889059/cs-6250-exam-actual-exam-2026-computer-networks-exam-all-questions-and-correct-answers-verified-answers-upda… 4/50
