Protocol Data Units at each layer in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the Protocol Data Unit (PDU) at the Network layer.

Computer Networks

The PDU at the Network layer is called a [1].

Drag options to blanks, or click blank then click option'

AFrame

BPacket

CSegment

DBit

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the Network layer PDU with the Data Link layer PDU (Frame).

Thinking the Transport layer PDU (Segment) is used here.

The Network layer uses packets as its Protocol Data Unit (PDU). Packets contain the data along with network addressing information.

2fill in blank

medium

Complete the code to identify the PDU at the Transport layer.

Computer Networks

At the Transport layer, the PDU is called a [1].

Drag options to blanks, or click blank then click option'

ASegment

BPacket

CFrame

DBit

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the Transport layer PDU with the Network layer PDU (Packet).

Confusing it with the Data Link layer PDU (Frame).

The Transport layer breaks data into segments for transmission, adding port information for communication between applications.

3fill in blank

hard

Fix the error in the statement about the Data Link layer PDU.

Computer Networks

The PDU at the Data Link layer is called a [1].

Drag options to blanks, or click blank then click option'

APacket

BSegment

CFrame

DBit

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the Data Link layer PDU a packet or segment.

Confusing bits (Physical layer) with frames.

The Data Link layer uses frames as its PDU. Frames include physical addressing and error checking.

4fill in blank

hard

Fill both blanks to complete the statement about the Physical layer PDU and the Data Link layer PDU.

Computer Networks

The Physical layer transmits data as [1], while the Data Link layer organizes data into [2].

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Abits

Bframes

Cpackets

Dsegments

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up bits and frames between the two layers.

Confusing packets or segments with Physical or Data Link layer PDUs.

The Physical layer transmits raw bits over the medium. The Data Link layer groups bits into frames for error detection and control.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension that maps OSI layers to their PDUs.

Computer Networks

osi_pdus = {"Physical": [1], "Data Link": [2], "Network": [3]

Drag options to blanks, or click blank then click option'

A"bits"

B"frames"

C"packets"

D"segments"

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping PDUs between layers.

Using segments or packets incorrectly for Physical or Data Link layers.

This dictionary maps OSI layers to their Protocol Data Units: Physical layer uses bits, Data Link layer uses frames, and Network layer uses packets.