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Computer Networks (CS 6250) – Exam Questions with Complete Verified Answers 2026/2027 Latest Update for Networking Course Preparation

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Computer Networks (CS 6250) – Exam Questions with Complete Verified Answers 2026/2027 Latest Update for Networking Course Preparation

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3/25/26, 3:27 PM


COMPUTER NETWORKS (CS 6250) - EXAM
QUESTIONS WITH COMPLETE VERIFIED ANSWERS
2026/2027 LATEST UPDATE




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, 3/25/26, 3:27 PM




OSI Model Conceptual model that standardizes communications between computers


OSI 7 Layer Model 7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical




OSI 5 Layer Model 5. Application
4. Transport
3. Network
2. Data Link
1. Physical


OSI Model Advantages - Scalability
- Modularity
- Flexibility


OSI Model Disadvantages - Some layers depend on information from other layers, which can violate
goal of layer separation
- One layer may duplicate lower layer functionalities
- Additional overhead caused by abstraction between layers


Interface between the application layer & transport Sockets
layer

Application Layer Protocols HTTP, SMTP, FTP, DNS, etc.


What does the application layer do? It is the layer which interacts with the user to provide access to services and data
that is sent/received over a network.


What does the application layer call a packet of data? Message

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Subjects

  • routing protocols
  • network layer concepts
  • transport protocols
  • switching techniques

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