Q.1 How many layers are there in the OSI Model?
6
7
8
4
Explanation
The OSI (Open Systems Interconnection) model consists of 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Q.2 Router operates in which layer of the OSI reference Model?
Layer 1 (Physical)
Layer 2 (Data Link)
Layer 3 (Network)
Layer 4 (Transport)
Explanation
Routers operate at the Network Layer (Layer 3) to route data packets between different networks using IP addresses.
Q.3 Bridge works in which layer of the OSI Model?
Layer 1 (Physical)
Layer 2 (Data Link)
Layer 3 (Network)
Layer 4 (Transport)
Explanation
A Network Bridge operates at the Data Link Layer (Layer 2) and uses MAC addresses to filter and forward data.
Q.4 How many layers are in the standard TCP/IP Model?
4 Layer
2 Layer
3 Layer
7 Layer
Explanation
While versions vary, the standard TCP/IP model is generally recognized as having 4 layers: Application, Transport, Internet, and Network Access.
Q.5 Which of the following layers of the OSI Model is called the end-to-end layer?
Session Layer
Network Layer
Transport Layer
Data link layer
Explanation
The Transport Layer (Layer 4) is responsible for end-to-end communication, providing reliable or unreliable data delivery to the upper layers.
Q.6 Repeater operates in which layer of the OSI Model?
Physical Layer
Network Layer
Transport Layer
Application Layer
Explanation
A Repeater is a hardware device that regenerates signals at the electrical level, placing it in the Physical Layer (Layer 1).
Q.7 MAC Address is an example of which layer's addressing?
Physical Layer
Network Layer
Data link Layer
Application Layer
Explanation
The Media Access Control (MAC) address is a physical address used by the Data Link Layer to identify devices on a local network.
Q.8 Which of the following are protocols of the Application Layer?
FTP
SMTP
POP3
All of these
Explanation
FTP (File Transfer Protocol), SMTP (Simple Mail Transfer Protocol), and POP3 are all protocols that provide services directly to user applications.
Q.9 Which of the following protocols is defined in the Transport Layer?
FTP
SMTP
UDP
All of these
Explanation
UDP (User Datagram Protocol) and TCP are the primary protocols found in the Transport Layer (Layer 4).
Q.10 Which of the following is NOT an application layer protocol?
FTP
SMTP
UDP
TCP
Explanation
TCP (Transmission Control Protocol) is a Transport Layer protocol, not an Application Layer protocol.
Q.11 In the OSI model, encryption and decryption are functions of which layer?
Transport Layer
Physical Layer
Application Layer
Presentation Layer
Explanation
The Presentation Layer (Layer 6) handles data formatting, compression, and encryption/decryption.
Q.12 In the OSI model, what does ARP stand for?
Address Resolution Protocol
Address Resolution Protect
Address Result Protocol
None
Explanation
ARP stands for Address Resolution Protocol, which is used to find the MAC address associated with a given IP address.
Q.13 In the OSI model, what does RARP stand for?
Reverse Address Resolution Protocol
Review Address Resolution Protect
Router Address Result Protocol
None
Explanation
RARP stands for Reverse Address Resolution Protocol, used to request an IP address when only the MAC address is known.
Q.14 In the OSI model, what does ICMP stand for?
Internt Control Message Protect
Internt Comunication Message Protocols
Internet Control Message Protocol
None
Explanation
ICMP (Internet Control Message Protocol) is used by network devices to send error messages and operational information (e.g., Ping).
Q.15 Who developed the standards for the OSI Reference model?
ANSI
IEEE
EBC
ISO
Explanation
The OSI model was developed by the International Organization for Standardization (ISO) to standardize computer networking.
Q.16 What does the acronym ISO stand for in the context of the OSI Model?
International Origin of Standardization
International Organization for Standardization
Internt Organization of Standardization
None
Explanation
ISO stands for the International Organization for Standardization, the body that created the OSI 7-layer framework.
Q.17 The OSI model was officially developed and published in which year?
1983
1984
1985
1986
Explanation
The ISO published the Open Systems Interconnection (OSI) model as a standard in 1984.
Q.18 In an OSI Model, the first (bottom) layer is the?
Session layer
Application Layer
Data link layer
Physical Layer
Explanation
The Physical Layer is Layer 1, the lowest layer of the OSI model, dealing with the transmission of raw bits over a physical medium.
Q.19 Which layer of the OSI Reference model is primarily responsible for framing and error detection?
Session layer
Application Layer
Data link layer
Physical Layer
Explanation
The Data Link Layer (Layer 2) organizes bits into frames and performs error checking to ensure reliable local delivery.
Q.20 In the OSI Model, dialogue control and token management are responsibilities of?
Session layer
Application Layer
Data link layer
Physical Layer
Explanation
The Session Layer (Layer 5) manages the establishment, maintenance, and termination of connections (dialogues) between applications.
Related Link
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