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OSI Model Layers and Networking Devices
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1
Question
What is the primary purpose of the OSI model?
Answer
Conceptual framework for understanding network interactions in seven layers
2
Question
How many layers does the OSI model have?
Answer
Seven layers
3
Question
What function does the Physical Layer (Layer 1) serve?
Answer
Physical transmission of data over network media
4
Question
What does the Physical Layer handle in networking?
Answer
Hardware aspects including cables and electrical signals
5
Question
What does the Physical Layer transmit?
Answer
Raw bits rather than logical data packets
6
Question
What is the responsibility of the Data Link Layer (Layer 2)?
Answer
Node-to-node data transfer and error detection/correction
7
Question
What does the Data Link Layer establish between devices?
Answer
Connections between two physically connected devices
8
Question
What does the Data Link Layer handle in data packets?
Answer
Framing, addressing, and error correction
9
Question
What are the two sublayers of the Data Link Layer?
Answer
MAC and LLC sublayers
10
Question
What is the function of the MAC sublayer?
Answer
Manages protocol access to the physical network medium
11
Question
What does the MAC sublayer use for addressing?
Answer
MAC addresses for node communication
12
Question
What is the role of the LLC sublayer?
Answer
Provides multiplexing for multiple network protocols
13
Question
How does LLC ensure data integrity?
Answer
Through flow and error control mechanisms
14
Question
What does the LLC sublayer interface with?
Answer
Networking software and device hardware
15
Question
What is the main responsibility of the Network Layer (Layer 3)?
Answer
Logical addressing and routing of packets across networks
16
Question
How does the Network Layer determine data paths?
Answer
Using routing protocols for best path selection
17
Question
What does the Network Layer manage besides routing?
Answer
Packet forwarding, congestion, and filtering
18
Question
What is the function of the Transport Layer (Layer 4)?
Answer
Reliable, transparent transfer of data between end systems
19
Question
What mechanisms does the Transport Layer provide?
Answer
Error correction, flow control, and segmentation
20
Question
What does the Session Layer (Layer 5) manage?
Answer
Setup, maintenance, and termination of sessions
21
Question
What connections does the Session Layer handle?
Answer
Between local and remote applications
22
Question
What dialog control does the Session Layer provide?
Answer
Half-duplex or full-duplex between end systems
23
Question
What is the role of the Presentation Layer (Layer 6)?
Answer
Translation, encryption, and compression of data
24
Question
How does the Presentation Layer ensure data usability?
Answer
By mediating between application and network formats
25
Question
What services does the Presentation Layer provide?
Answer
Data encryption and compression for secure transfer
26
Question
What is the function of the Application Layer (Layer 7)?
Answer
Interface between user and network services
27
Question
What does the Application Layer facilitate?
Answer
End-user processes accessing network services
28
Question
What protocols does the Application Layer define?
Answer
For file transfers, email, and web browsing
29
Question
What are physical appliances in networking?
Answer
Dedicated hardware for specific network functions
30
Question
What advantages do physical appliances offer?
Answer
High performance and reliability