IGET
IGET MCQ · Tests · Exam Prep
Quiz Start PYQ NEW

Medical & Engg

NEET UG JEE Main Campus Placement

Govt Exams

All Govt. Exams UPSC & Civil Svc SSC Exams Banking Exams Railway Exams Defence Exams State PSC

Teacher Exams

All Teacher Exams Central-Level State-Level TET

Subjects

Quantitative Aptitude1,106 C Programming1,000 Java Programming958 Placement Papers654 English Language495 Bank PO / Clerk / RBI494 View All Subjects

Quick Links

Online Tests PYQ Bank Current Affairs Exam Schedule
Home › Subjects › Networking › OSI Model

Networking
OSI Model

OSI, TCP/IP, protocols, routing, security

100 Q 1 Topics Take Test
Advertisement
Difficulty: All Easy Medium Hard 71–80 of 100
Topics in Networking
All OSI Model 100
Q.71 Medium OSI Model
A manufacturing facility's IoT devices communicate using raw bit transmission over twisted pair cables. Which OSI layer(s) are being utilized?
A Layers 1 and 2
B Layer 1 only
C Layers 2 and 3
D Layers 3, 4, and 5
Correct Answer:  A. Layers 1 and 2
EXPLANATION

Raw bit transmission over physical media (twisted pair cables) involves Layer 1 (Physical Layer). Data Link Layer (Layer 2) protocols handle the framing and transmission rules for these bits.

Take Test
Q.72 Medium OSI Model
In a corporate network, certain applications require guaranteed delivery and error checking, while others prioritize speed. Which Layer 4 protocols would best serve these requirements respectively?
A TCP for speed; UDP for guaranteed delivery
B UDP for both; TCP for neither
C TCP for guaranteed delivery; UDP for speed
D Both TCP and UDP provide identical services
Correct Answer:  C. TCP for guaranteed delivery; UDP for speed
EXPLANATION

TCP provides reliable, ordered delivery with error checking; UDP prioritizes speed with minimal overhead. Choice of protocol depends on application requirements.

Take Test
Q.73 Medium OSI Model
A network administrator needs to implement a solution to prevent unauthorized access to sensitive data transmitted over the network. Which OSI layer would be most appropriate for implementing encryption?
A Layer 2 - Data Link Layer
B Layer 4 - Transport Layer
C Layer 6 - Presentation Layer
D Layer 7 - Application Layer
Correct Answer:  C. Layer 6 - Presentation Layer
EXPLANATION

The Presentation Layer (Layer 6) is responsible for data encryption, decryption, compression, and translation, making it the appropriate layer for implementing encryption services.

Take Test
Q.74 Medium OSI Model
What is the relationship between the TCP/IP model and the OSI model in terms of functionality?
A They are completely independent and serve different purposes
B The TCP/IP model's Application Layer encompasses OSI Layers 5, 6, and 7
C The TCP/IP model is a replacement that performs identically to the OSI model
D The TCP/IP model operates only at Layers 1-3 of the OSI model
Correct Answer:  B. The TCP/IP model's Application Layer encompasses OSI Layers 5, 6, and 7
EXPLANATION

The TCP/IP model's Application Layer combines the functionality of OSI Layers 5 (Session), 6 (Presentation), and 7 (Application).

Take Test
Q.75 Medium OSI Model
During a network audit, it is discovered that HTTP traffic is being intercepted and modified. At which minimum OSI layer would a device need to operate to perform this attack?
A Layer 3 - Network Layer
B Layer 4 - Transport Layer
C Layer 5 - Session Layer
D Layer 7 - Application Layer
Correct Answer:  D. Layer 7 - Application Layer
EXPLANATION

HTTP is an Application Layer (Layer 7) protocol. To intercept and modify HTTP traffic, an attacker must operate at Layer 7 where the actual content is accessible.

Take Test
Q.76 Medium OSI Model
A company experiences intermittent network connectivity issues. When troubleshooting, an administrator discovers that the issue occurs only when data passes through a specific gateway. At which OSI layer(s) should the administrator focus their investigation?
A Layers 1 and 2 only
B Layers 3 and 4 primarily, with possible involvement of Layer 7
C Layer 2 only
D Layer 1 only
Correct Answer:  B. Layers 3 and 4 primarily, with possible involvement of Layer 7
EXPLANATION

A gateway typically operates at Layer 3 (routing) and Layer 4 (protocol conversion), and may involve Layer 7 for application-level filtering. Issues at the gateway level suggest Layer 3-4 problems.

Take Test
Q.77 Easy OSI Model
Which of the following best describes encapsulation in the OSI model?
A The process of removing headers from data as it moves up the OSI layers
B The process of adding headers and trailers to data as it moves down the OSI layers
C The process of converting analog signals to digital signals
D The process of establishing a secure connection between two hosts
Correct Answer:  B. The process of adding headers and trailers to data as it moves down the OSI layers
EXPLANATION

Encapsulation is the process of adding protocol-specific headers and trailers to data at each layer as it moves down from the Application Layer to the Physical Layer.

Take Test
Q.78 Easy OSI Model
In the context of the OSI model, routers primarily operate at which layer?
A Data Link Layer
B Transport Layer
C Network Layer
D Application Layer
Correct Answer:  C. Network Layer
EXPLANATION

Routers operate at Layer 3 (Network Layer) and use IP addresses to forward packets between different networks.

Take Test
Q.79 Easy OSI Model
Which protocol operates at Layer 4 of the OSI model and ensures reliable, ordered delivery of data?
A UDP
B TCP
C IP
D ICMP
Correct Answer:  B. TCP
EXPLANATION

TCP (Transmission Control Protocol) operates at Layer 4 and provides reliable, connection-oriented delivery with error checking and sequencing.

Take Test
Q.80 Easy OSI Model
At which OSI layer does a switch operate to forward frames based on MAC addresses?
A Layer 1 - Physical Layer
B Layer 2 - Data Link Layer
C Layer 3 - Network Layer
D Layer 4 - Transport Layer
Correct Answer:  B. Layer 2 - Data Link Layer
EXPLANATION

Switches operate at Layer 2 (Data Link Layer) and use MAC address tables to forward frames to appropriate ports.

Take Test
IGET
iget AI
Online · Ask anything about exams
Hi! 👋 I'm your iget AI assistant.

Ask me anything about exam prep, MCQ solutions, study tips, or strategies! 🎯
UPSC strategy SSC CGL syllabus Improve aptitude NEET Biology tips