Which layer of the OSI model is responsible for routing packets across networks?
Answer: A
The Network Layer (Layer 3) handles routing, IP addressing, and logical addressing to move data across different networks using routers.
Q.2Easy
What is the primary function of the Data Link Layer in the OSI model?
Answer: B
The Data Link Layer (Layer 2) uses MAC addresses for physical addressing and creates frames for transmission over physical media.
Q.3Easy
Which protocol operates at the Transport Layer (Layer 4) of the OSI model?
Answer: B
TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are core Transport Layer protocols that manage end-to-end communication.
Q.4Easy
The Physical Layer of the OSI model deals with which of the following?
Answer: C
Layer 1 (Physical Layer) handles the actual transmission of raw bits over physical media like cables, fiber optics, and wireless signals.
Q.5Easy
Which layer of the OSI model is responsible for managing dialogs and session establishment?
Answer: B
The Session Layer (Layer 5) manages, establishes, and terminates communication sessions between applications.
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Q.6Easy
Which of the following layers of the OSI model is responsible for converting data into signals suitable for transmission over a physical medium?
Answer: A
The Physical Layer (Layer 1) handles the conversion of data into electrical signals, light pulses, or radio waves for transmission over physical media.
Q.7Easy
At which OSI layer does a switch operate to forward frames based on MAC addresses?
Answer: B
Switches operate at Layer 2 (Data Link Layer) and use MAC address tables to forward frames to appropriate ports.
Q.8Easy
Which protocol operates at Layer 4 of the OSI model and ensures reliable, ordered delivery of data?
Answer: B
TCP (Transmission Control Protocol) operates at Layer 4 and provides reliable, connection-oriented delivery with error checking and sequencing.
Q.9Easy
In the context of the OSI model, routers primarily operate at which layer?
Answer: C
Routers operate at Layer 3 (Network Layer) and use IP addresses to forward packets between different networks.
Q.10Easy
Which of the following best describes encapsulation in the OSI model?
Answer: B
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.
Q.11Easy
Which layer of the OSI model is responsible for routing packets across different networks?
Answer: A
The Network Layer (Layer 3) handles routing, IP addressing, and logical addressing to forward packets across different networks using routers.
Q.12Easy
At which OSI layer do switches operate to forward frames based on MAC addresses?
Answer: B
Switches operate at Layer 2 (Data Link Layer) and use MAC address tables to forward frames to appropriate ports within a LAN.
Q.13Easy
Which of the following protocols operates at the Transport Layer (Layer 4) of the OSI model?
Answer: B
TCP and UDP are Transport Layer protocols that manage end-to-end communication, reliability, and port-based services.
Q.14Easy
What is the primary function of the Presentation Layer (Layer 6) in the OSI model?
Answer: B
Layer 6 handles data formatting, encryption, compression, and conversion between different character sets and formats for application compatibility.
Q.15Easy
In the context of the OSI model, which layer is responsible for establishing, maintaining, and terminating connections?
Answer: B
The Session Layer (Layer 5) manages dialog control, session establishment, maintenance, and termination between applications.
Q.16Easy
Which layer of the OSI model is responsible for routing and logical addressing?
Answer: A
The Network Layer (Layer 3) handles routing decisions and logical addressing using IP addresses. It determines the best path for data packets to travel across networks.
Q.17Easy
Which OSI layer protocols include TCP and UDP?
Answer: C
TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at Layer 4, the Transport Layer. TCP is connection-oriented while UDP is connectionless.
Q.18Easy
In the OSI model, which layer is responsible for managing dialog control and session establishment?
Answer: C
The Session Layer (Layer 5) manages session establishment, maintenance, and termination. It handles dialog control between communicating devices.
Q.19Easy
Which layer of the OSI model encapsulates data into segments?
Answer: C
The Transport Layer (Layer 4) encapsulates data from the Application Layer into segments (TCP) or datagrams (UDP) with port numbers and reliability information.
Q.20Easy
An ISP technician troubleshoots a cable issue affecting network connectivity. The problem is at the layer that deals with physical transmission media. Which layer does this represent?
Answer: B
The Physical Layer (Layer 1) is responsible for the actual physical transmission media including cables, connectors, voltage levels, and signal transmission. Cable issues are Layer 1 problems.
