SSC CGL Computer – Networking – Devices, Topologies & Protocols – Level 3 · Challenge
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128 + 32 + 16 + 8 + 4 + 2 = 190 → 128–191 → Class B.
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SSC CGL Computer – Networking – Devices, Topologies & Protocols – Level 3 · Challenge – 8 questions, subject: Computer Knowledge. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.
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1.
Diagram-basedHow many more links are needed to turn this partial mesh into a full mesh?
Correct Answer: B [6]
Explanation:
Full mesh of 6 = 6 × 5 ÷ 2 = 15; drawn 9 (6 round the ring + 3 across) → 6 more.
2.
Diagram-basedIn this home network, which device forwards frames to the wired computers by their MAC addresses?
Correct Answer: A [Switch]
Explanation:
The switch works at Layer 2 and reads MAC addresses; the router (Layer 3) reads IP addresses.
3.
Diagram-basedIn the TCP/IP model, the OSI Session layer is part of which layer?
Correct Answer: C [Application]
Explanation:
OSI 5, 6, 7 → TCP/IP Application.
4.
The third octet of an IPv4 address is 00101101 in binary. What is it in decimal?
Correct Answer: B [45]
Explanation:
Answer: 45. 32 + 8 + 4 + 1 = 45.
5.
True/False countHow many of these statements about topologies are correct?
1. In a bus, a break in the backbone stops the whole network
2. A full mesh of 5 devices needs 10 links
3. A ring of 6 devices needs 5 links
4. In a star, failure of the central switch stops all communication
1. In a bus, a break in the backbone stops the whole network
2. A full mesh of 5 devices needs 10 links
3. A ring of 6 devices needs 5 links
4. In a star, failure of the central switch stops all communication
Correct Answer: D [Only three]
Explanation:
1, 2 and 4 are true; a ring of n devices needs n links (6) → three.
6.
Arrange in orderArrange the OSI layers from top (7) to bottom: P. Transport Q. Application R. Session S. Presentation
Correct Answer: A [Q → S → R → P]
Explanation:
7 Application → 6 Presentation → 5 Session → 4 Transport.
7.
An office of 10 computers is wired as a star. If the central switch fails, how many computers can still send data to each other over the network?
Correct Answer: B [0]
Explanation:
Every path goes through the centre – the whole star stops.
8.
A network address begins with 10111110 in binary. What is the first number, and the class?
Correct Answer: C [190, Class B]
Explanation:
128 + 32 + 16 + 8 + 4 + 2 = 190 → 128–191 → Class B.
➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Computer Knowledge book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-computer-knowledge
📘 SSC CGL 2026 – Computer Knowledge (Tier II Paper I – Section III)
Here you get the answer with a one-line explanation. 672 original questions with answer key and explanations · notes, figures, shortcut keys and memory aids · practice sets + 3 Computer Knowledge mock tests
Get the book – ₹149 More quizzes
› SSC CGL Computer – Mock Test M3 – Computer Knowledge Module
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Score: 0
Answered: 0 / 0
