Transmission media (wired, wireless) in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to identify a common wired transmission medium.

Computer Networks

A common wired transmission medium used in networks is [1].

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

Afiber optic cable

Bradio waves

Cinfrared signals

Dmicrowaves

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing wireless options like radio waves instead of a cable.

Confusing infrared signals with wired media.

Fiber optic cable is a wired medium that uses light to transmit data over long distances with high speed and low loss.

2fill in blank

medium

Complete the sentence to identify a wireless transmission medium.

Computer Networks

Data can be transmitted wirelessly using [1].

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

Afiber optic cable

Bradio waves

Ccoaxial cable

Dtwisted pair cable

Attempts:

3 left

💡 Hint

Common Mistakes

Selecting wired cables instead of wireless options.

Confusing radio waves with microwaves or infrared.

Radio waves are a wireless transmission medium used to send data through the air without cables.

3fill in blank

hard

Fix the error by choosing the correct transmission medium type for the example.

Computer Networks

An example of a [1] transmission medium is coaxial cable.

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

Awireless

Boptical

Cwired

Dsatellite

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing wireless or satellite for a cable example.

Confusing optical fiber with coaxial cable.

Coaxial cable is a type of wired transmission medium used for cable TV and internet connections.

4fill in blank

hard

Fill both blanks to complete the description of transmission media types.

Computer Networks

Wired media use [1] to transmit data, while wireless media use [2].

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

Acables

Bsatellites

Celectromagnetic waves

Drouters

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing satellites or routers as the medium itself.

Mixing up cables with electromagnetic waves.

Wired media transmit data through cables, and wireless media use electromagnetic waves like radio waves or microwaves.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension describing transmission media.

Computer Networks

media_types = { [1]: [2] for [3] in ['wired', 'wireless'] }

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

A{

B'type'

Cmedia

D}

Attempts:

3 left

💡 Hint

Common Mistakes

Using closing brace before opening brace.

Using incorrect loop variable names.

Confusing keys and values in dictionary comprehension.

This code creates a dictionary with keys from the list and values as the string 'type'. The braces define the dictionary, and 'media' is the loop variable.

Practice

1. Which of the following is an example of a wired transmission medium?

easy

A. Radio waves

B. Microwaves

C. Infrared signals

D. Twisted pair cable

Solution

1. Step 1: Understand wired media

   Wired media use physical cables to carry signals between devices.

2. Step 2: Identify examples

   Twisted pair cable is a common wired medium, while radio, infrared, and microwaves are wireless.

3. Final Answer:

   Twisted pair cable -> Option D

4. Quick Check:

   Wired media = cables like twisted pair [OK]

Hint: Wired media always use cables, wireless use airwaves [OK]

Common Mistakes:

• Confusing wireless signals as wired
• Thinking infrared uses cables
• Mixing radio waves with cables

2. Which of the following correctly describes wireless transmission media?

easy

A. Uses cables like coaxial and fiber optic

B. Uses airwaves such as radio and infrared

C. Requires physical connection between devices

D. Only works indoors

Solution

1. Step 1: Define wireless media

   Wireless media transmit data through air without cables.

2. Step 2: Identify correct examples

   Radio waves and infrared are common wireless transmission methods.

3. Final Answer:

   Uses airwaves such as radio and infrared -> Option B

4. Quick Check:

   Wireless = airwaves like radio, infrared [OK]

Hint: Wireless means no cables, uses airwaves [OK]

Common Mistakes:

• Choosing cable-based options
• Thinking wireless needs physical wires
• Assuming wireless only works indoors

3. Consider the following code snippet describing transmission media types:

media = ['Twisted Pair', 'Radio', 'Fiber Optic', 'Infrared']
wired = [m for m in media if 'Fiber' in m or 'Twisted' in m]
print(wired)

What will be the output?

medium

A. ['Twisted Pair']

B. ['Radio', 'Infrared']

C. ['Twisted Pair', 'Fiber Optic']

D. ['Fiber Optic']

Solution

1. Step 1: Understand list comprehension filter

   The code selects items containing 'Fiber' or 'Twisted' from the media list.

2. Step 2: Identify matching items

   'Twisted Pair' and 'Fiber Optic' both match the condition, so they are included.

3. Final Answer:

   ['Twisted Pair', 'Fiber Optic'] -> Option C

4. Quick Check:

   Filter for wired media = ['Twisted Pair', 'Fiber Optic'] [OK]

Hint: Look for keywords 'Fiber' or 'Twisted' in list items [OK]

Common Mistakes:

• Selecting wireless items by mistake
• Ignoring 'Fiber' keyword
• Confusing list output format

4. A student wrote this statement about transmission media: "Fiber optic cables use radio waves to transmit data." What is wrong with this statement?

medium

A. Fiber optic cables use light, not radio waves

B. Fiber optic cables are wireless

C. Radio waves cannot carry data

D. Fiber optic cables use electrical signals only

Solution

1. Step 1: Understand fiber optic transmission

   Fiber optic cables transmit data using light signals inside glass fibers.

2. Step 2: Compare with radio waves

   Radio waves are wireless signals traveling through air, not inside cables.

3. Final Answer:

   Fiber optic cables use light, not radio waves -> Option A

4. Quick Check:

   Fiber optic = light signals, not radio waves [OK]

Hint: Fiber optic uses light, radio waves are wireless [OK]

Common Mistakes:

• Thinking fiber optic uses radio waves
• Confusing wireless and wired media
• Assuming fiber optic uses electricity only

5. A company wants to set up a network in a large building with many walls and floors. They want fast data speeds and minimal interference. Which transmission media should they choose?

hard

A. Fiber optic cables for high speed and low interference

B. Twisted pair cables for low cost

C. Infrared signals for secure communication

D. Wireless radio waves for easy setup

Solution

1. Step 1: Analyze company needs

   They want fast speeds and minimal interference in a large building.

2. Step 2: Evaluate media options

   Wireless radio waves can face interference and walls block signals; twisted pair is slower and less reliable over long distances; infrared requires line of sight; fiber optic offers high speed and low interference through cables.

3. Final Answer:

   Fiber optic cables for high speed and low interference -> Option A

4. Quick Check:

   Best for speed and interference = fiber optic cables [OK]

Hint: For speed and low interference, choose fiber optic cables [OK]

Common Mistakes:

• Choosing wireless despite interference
• Ignoring speed differences
• Assuming infrared works through walls