Page 1 of 137
CS6250 COMPUTER NETWORKS EXAM 1 QUESTIONS AND
CORRECT VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR-
JUST RELEASED
CS6250 COMPUTER NETWORKS EXAM 1
Exam Coverage
1. Internet architecture, evolution, and packet-switched networking
2. Network layering, encapsulation, and protocol responsibilities
3. Application-to-transport interfaces and sockets
4. UDP, TCP, ports, multiplexing, and demultiplexing
5. Reliable data transfer and transport-layer mechanisms
6. TCP connection management, flow control, and congestion control
7. IP addressing, forwarding, and packet delivery
8. Routing principles and routing algorithms
9. Distance-vector and link-state routing
10. Router architecture, forwarding, queues, and packet-processing decisions
250 MCQs
1.
Which statement best describes the fundamental purpose of a computer network when
multiple independent hosts need to communicate?
A. To allow devices to exchange information using agreed communication protocols
B. To force every application to use identical hardware
C. To eliminate the need for operating systems
D. To prevent independent devices from communicating directly
, Page 2 of 137
Answer: A
Rationale: A computer network provides communication among independent devices through
shared protocols, addressing, forwarding, and transmission mechanisms.
2.
Which characteristic most directly distinguishes packet switching from traditional circuit
switching in communication networks?
A. Packet switching dynamically shares network resources among different flows
B. Packet switching permanently reserves an entire physical path
C. Packet switching prevents multiple users from sharing links
D. Packet switching requires every application to establish a dedicated circuit
Answer: A
Rationale: Packet-switched networks statistically multiplex traffic, allowing different flows to
share links without permanently reserving capacity.
3.
Why did packet switching become an important architectural approach for large-scale computer
communication?
, Page 3 of 137
A. It efficiently shares network capacity among bursty and independently generated traffic
B. It guarantees zero delay for every application
C. It eliminates packet loss under congestion
D. It requires every host to transmit continuously
Answer: A
Rationale: Computer applications often generate bursty traffic, making dynamic sharing more
efficient than permanent circuit allocation.
4.
Which concept describes the process by which information is divided into smaller units before
being transmitted through a packet-switched network?
A. Packetization
B. Authentication
C. Compilation
D. Virtualization
Answer: A
Rationale: Packetization divides larger messages or streams into packets that can be transmitted
independently through the network.
, Page 4 of 137
5.
What is the primary advantage of layering in network protocol architecture?
A. It separates responsibilities so individual protocol functions can be designed and modified
independently
B. It requires every protocol to perform every networking function
C. It eliminates interactions between protocols
D. It guarantees that every network uses identical implementations
Answer: A
Rationale: Layering organizes networking functions into abstractions with defined interfaces,
making complex systems easier to design and maintain.
6.
Which layer is primarily responsible for providing communication services directly to network
applications?
A. Application layer
B. Network layer
C. Data-link layer
D. Physical layer
Answer: A
CS6250 COMPUTER NETWORKS EXAM 1 QUESTIONS AND
CORRECT VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR-
JUST RELEASED
CS6250 COMPUTER NETWORKS EXAM 1
Exam Coverage
1. Internet architecture, evolution, and packet-switched networking
2. Network layering, encapsulation, and protocol responsibilities
3. Application-to-transport interfaces and sockets
4. UDP, TCP, ports, multiplexing, and demultiplexing
5. Reliable data transfer and transport-layer mechanisms
6. TCP connection management, flow control, and congestion control
7. IP addressing, forwarding, and packet delivery
8. Routing principles and routing algorithms
9. Distance-vector and link-state routing
10. Router architecture, forwarding, queues, and packet-processing decisions
250 MCQs
1.
Which statement best describes the fundamental purpose of a computer network when
multiple independent hosts need to communicate?
A. To allow devices to exchange information using agreed communication protocols
B. To force every application to use identical hardware
C. To eliminate the need for operating systems
D. To prevent independent devices from communicating directly
, Page 2 of 137
Answer: A
Rationale: A computer network provides communication among independent devices through
shared protocols, addressing, forwarding, and transmission mechanisms.
2.
Which characteristic most directly distinguishes packet switching from traditional circuit
switching in communication networks?
A. Packet switching dynamically shares network resources among different flows
B. Packet switching permanently reserves an entire physical path
C. Packet switching prevents multiple users from sharing links
D. Packet switching requires every application to establish a dedicated circuit
Answer: A
Rationale: Packet-switched networks statistically multiplex traffic, allowing different flows to
share links without permanently reserving capacity.
3.
Why did packet switching become an important architectural approach for large-scale computer
communication?
, Page 3 of 137
A. It efficiently shares network capacity among bursty and independently generated traffic
B. It guarantees zero delay for every application
C. It eliminates packet loss under congestion
D. It requires every host to transmit continuously
Answer: A
Rationale: Computer applications often generate bursty traffic, making dynamic sharing more
efficient than permanent circuit allocation.
4.
Which concept describes the process by which information is divided into smaller units before
being transmitted through a packet-switched network?
A. Packetization
B. Authentication
C. Compilation
D. Virtualization
Answer: A
Rationale: Packetization divides larger messages or streams into packets that can be transmitted
independently through the network.
, Page 4 of 137
5.
What is the primary advantage of layering in network protocol architecture?
A. It separates responsibilities so individual protocol functions can be designed and modified
independently
B. It requires every protocol to perform every networking function
C. It eliminates interactions between protocols
D. It guarantees that every network uses identical implementations
Answer: A
Rationale: Layering organizes networking functions into abstractions with defined interfaces,
making complex systems easier to design and maintain.
6.
Which layer is primarily responsible for providing communication services directly to network
applications?
A. Application layer
B. Network layer
C. Data-link layer
D. Physical layer
Answer: A
