Q. In IP addressing, what does the subnet mask 255.255.255.0 indicate?
A.
Class A network
B.
Class B network
C.
Class C network
D.
Class D network
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Solution
A subnet mask of 255.255.255.0 indicates a Class C network, allowing for 256 IP addresses in total.
Correct Answer:
C
— Class C network
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Q. What is the maximum number of hosts that can be addressed in a Class C network?
A.
254
B.
256
C.
512
D.
1024
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Solution
In a Class C network, the maximum number of usable host addresses is 254, calculated as 2^8 - 2.
Correct Answer:
A
— 254
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Q. What is the purpose of the Network Layer in the OSI model?
A.
Data formatting
B.
Routing packets
C.
Error detection
D.
Session management
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Solution
The Network Layer (Layer 3) is responsible for routing packets across different networks and managing logical addressing.
Correct Answer:
B
— Routing packets
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Q. What is the purpose of the Physical Layer in the OSI model?
A.
Data encryption
B.
Signal transmission
C.
Session management
D.
Data formatting
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Solution
The Physical Layer (Layer 1) is responsible for the transmission of raw bitstreams over a physical medium, including electrical signals and light pulses.
Correct Answer:
B
— Signal transmission
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Q. Which addressing scheme is used in the Internet Protocol (IP)?
A.
MAC Addressing
B.
Logical Addressing
C.
Physical Addressing
D.
Session Addressing
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Solution
Logical Addressing is used in the Internet Protocol (IP) to identify devices on a network uniquely.
Correct Answer:
B
— Logical Addressing
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Q. Which layer of the OSI model does a switch operate at?
A.
Network Layer
B.
Transport Layer
C.
Data Link Layer
D.
Application Layer
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Solution
A switch operates at the Data Link Layer (Layer 2) of the OSI model, forwarding frames based on MAC addresses.
Correct Answer:
C
— Data Link Layer
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Q. Which layer of the OSI model is responsible for establishing, managing, and terminating sessions?
A.
Transport Layer
B.
Session Layer
C.
Application Layer
D.
Network Layer
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Solution
The Session Layer (Layer 5) is responsible for establishing, managing, and terminating sessions between applications.
Correct Answer:
B
— Session Layer
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Q. Which of the following is NOT a function of the Data Link Layer?
A.
Framing
B.
Physical addressing
C.
Routing
D.
Error detection
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Solution
Routing is not a function of the Data Link Layer; it is performed by the Network Layer.
Correct Answer:
C
— Routing
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Q. Which OSI layer is responsible for error detection and correction?
A.
Session Layer
B.
Transport Layer
C.
Data Link Layer
D.
Physical Layer
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Solution
The Data Link Layer (Layer 2) is responsible for error detection and correction to ensure reliable data transfer.
Correct Answer:
C
— Data Link Layer
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Q. Which protocol is used for reliable data transmission in the Transport Layer?
A.
UDP
B.
IP
C.
TCP
D.
ICMP
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Solution
TCP (Transmission Control Protocol) is used for reliable data transmission, providing error recovery and flow control.
Correct Answer:
C
— TCP
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