Interview Prepcomputer-networkseasyAmazonMicrosoftTCSInfosysWiproCognizant

TCP/IP Model vs OSI - Mapping & Differences

Choose your preparation mode3 modes available

Solution Trace

Start learning this pattern below

Jump into concepts and practice - no test required

Recommended

Test this pattern10 questions across easy, medium, and hard to know if this pattern is strong

▶

Steps

setup

Initialize TCP/IP and OSI Model Layers

We set up nodes representing the layers of the TCP/IP and OSI models. The packet is initially at the Application layer of the TCP/IP model, ready to start processing.

💡 Setting up the layers as nodes helps visualize how data flows through each model distinctly.

Line:

tcp_ip_layers = ['Application', 'Transport', 'Internet', 'Network Access']
osi_layers = ['Application', 'Presentation', 'Session', 'Transport', 'Network', 'Data Link', 'Physical']
packet = {'payload': 'data', 'protocol': 'TCP/IP'}

💡 The models have different numbers of layers and naming conventions, which will affect how the packet flows.

def process_application_layer(packet):  # STEP 2
    # Prepare application data
    return packet

def add_transport_header(packet):  # STEP 3
    # Add TCP/UDP header
    return packet + ' + transport header'

def add_internet_header(packet):  # STEP 4
    # Add IP header
    return packet + ' + IP header'

def add_network_access_header(packet):  # STEP 5
    # Add frame header
    return packet + ' + frame header'

def process_osi_application_layer(packet):  # STEP 6
    # OSI Application processing
    return packet

def process_presentation_layer(packet):  # STEP 7
    # Data formatting, encryption
    return packet + ' + presentation processing'

def process_session_layer(packet):  # STEP 8
    # Manage sessions
    return packet + ' + session management'

def process_transport_layer(packet):  # STEP 9
    # Reliable delivery
    return packet + ' + transport header'

def process_network_layer(packet):  # STEP 10
    # Logical addressing
    return packet + ' + network header'

def process_data_link_layer(packet):  # STEP 11
    # Framing and MAC addressing
    return packet + ' + frame header'

def transmit_physical_layer(packet):  # STEP 12
    # Convert to signals
    pass

def main():  # Overall flow
    packet = 'data'  # STEP 1
    packet = process_application_layer(packet)  # STEP 2
    packet = add_transport_header(packet)  # STEP 3
    packet = add_internet_header(packet)  # STEP 4
    packet = add_network_access_header(packet)  # STEP 5
    packet_osi = 'data'  # STEP 6
    packet_osi = process_osi_application_layer(packet_osi)
    packet_osi = process_presentation_layer(packet_osi)  # STEP 7
    packet_osi = process_session_layer(packet_osi)  # STEP 8
    packet_osi = process_transport_layer(packet_osi)  # STEP 9
    packet_osi = process_network_layer(packet_osi)  # STEP 10
    packet_osi = process_data_link_layer(packet_osi)  # STEP 11
    transmit_physical_layer(packet_osi)  # STEP 12
    # Compare and summarize  # STEP 13-14

📊

TCP/IP Model vs OSI - Mapping & Differences - Watch the Algorithm Execute, Step by Step

Watching this step-by-step packet flow visualization helps you understand the layered architecture and the role of each layer in both models without needing to memorize abstract definitions.

Step 1/14

·Active fill★Answer cell

Setup complete: models and packet initialized

Hop: 0

TCP/IP Application

TCP/IP Transport

TCP/IP Internet

TCP/IP Network Access

OSI Application

OSI Presentation

OSI Session

OSI Transport

OSI Network

OSI Data Link

OSI Physical

📦Packet

↗ fromtcp_app

↘ totcp_app

📄 payloaddata

🔌 protocolTCP/IP

Initialization: Packet ready at TCP/IP Application layer

Practice

(1/5)

1. You want to prevent unauthorized access to your internal network by filtering incoming and outgoing traffic based on IP addresses and ports. Which network component is best suited for this task?

easy

A. Proxy server acting as an intermediary for client requests

B. Firewall filtering traffic based on rules

C. Reverse proxy optimizing server load

D. Content Delivery Network (CDN) caching static content

Start learning this pattern below

Initialize TCP/IP and OSI Model Layers

Packet Processing at TCP/IP Application Layer

Move Packet to TCP/IP Transport Layer

Move Packet to TCP/IP Internet Layer

Move Packet to TCP/IP Network Access Layer

Start OSI Model Processing at Application Layer

Move Packet to OSI Presentation Layer

Move Packet to OSI Session Layer

Move Packet to OSI Transport Layer

Move Packet to OSI Network Layer

Move Packet to OSI Data Link Layer

Move Packet to OSI Physical Layer

Compare Layer Mappings Between TCP/IP and OSI

Summary: Key Differences Highlighted

Key Takeaways

Practice

Solution

Step 1: Identify the role of each component

Step 2: Understand Proxy and Reverse Proxy roles

Step 3: CDN role

Final Answer:

Quick Check:

Solution

Step 1: Understand the meaning of 404 status code

Step 2: Trace the interaction

Step 3: Analyze options

Final Answer:

Quick Check:

Solution

Step 1: Understand sliding window's role in flow control

Step 2: Differentiate from congestion control mechanisms

Step 3: Identify retransmission and handshake roles

Final Answer:

Quick Check:

Solution

Step 1: Understand DHCP overhead

Step 2: Analyze impact of high churn

Step 3: Evaluate other options

Final Answer:

Quick Check:

Solution

Step 1: Understand caching layers

Step 2: Browser caching limitations

Step 3: Why other options are correct

Final Answer:

Quick Check: