Ethernet cable

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Quick Questions

Shade in the A or B circle for each question.

1. What kind of signal does an Ethernet cable use to carry data?

A Pulses of light along glass

B Electrical signals along copper wire

2. Which plug is found on the end of an Ethernet cable?

A RJ45 plug

B HDMI plug

3. What is inside a typical Ethernet cable?

A Twisted pairs of copper wire

B A single strand of glass fibre

4. An Ethernet cable connects a laptop to which device?

A A switch or router

B A Bluetooth speaker only

5. What is the typical maximum length of one Ethernet cable run?

A About 10 kilometres

B About 100 metres

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1RJ45		Alaptop --Ethernet cable--> switch
2twisted pair		BThe plug and port type on the end of an Ethernet cable that connects a device to a switch or router
3An Ethernet cable plugs into a device and a switch or router to carry data between them		CEthernet cables carry electrical signals along copper wires, not light along glass fibres. Light in glass is how fibre optic cable works.
4A typical Ethernet cable run can be at most about 100 metres before the signal gets too weak		DAn Ethernet cable is a wired connection. Data travels along the copper wires inside the cable, not through the air as radio waves.
5Ethernet cable = glass fibres carrying light		Emax cable length = 100 m
6Ethernet cable = wireless signal from a phone to a router		FTwo copper wires twisted together inside an Ethernet cable to carry electrical signals

Definitions

Ethernet cable

Fill in the Blanks

Complete each line of code by filling in the missing parts.

An Ethernet cable ends in an ____ plug

Ethernet sends data as __________ signals

Wires inside are twisted pairs of ______

Typical maximum cable length: ___ metres

It links a device to a ______ or router

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A cable = "Ethernet"

B plug = "RJ45"

C signal = "electrical"

D wire = "glass fibre"

Question 2

A device = "laptop"

B cable = "Ethernet"

C plug = "RJ45"

D link_to = "keyboard"

Question 3

A port = "HDMI"

B cable = "Ethernet"

C wires = "copper"

D pairs = 4

Question 4

A cable = "Ethernet"

B wire = "copper"

C max_length_m = 1000

D ends = "device and switch"

Question 5

A cable = "Ethernet"

B signal = "radio waves"

C carries = "data"

Answer Key

Ethernet cable

Section A: Quick Questions

B — Electrical signals along copper wire

A — RJ45 plug

A — Twisted pairs of copper wire

A — A switch or router

B — About 100 metres

Section B: Match the Pairs

RJ45 → The plug and port type on the end of an Ethernet cable that connects a device to a switch or router

twisted pair → Two copper wires twisted together inside an Ethernet cable to carry electrical signals

An Ethernet cable plugs into a device and a switch or router to carry data between them → laptop --Ethernet cable--> switch

A typical Ethernet cable run can be at most about 100 metres before the signal gets too weak → max cable length = 100 m

Ethernet cable = glass fibres carrying light → Ethernet cables carry electrical signals along copper wires, not light along glass fibres. Light in glass is how fibre optic cable works.

Ethernet cable = wireless signal from a phone to a router → An Ethernet cable is a wired connection. Data travels along the copper wires inside the cable, not through the air as radio waves.

Section C: Definitions

Ethernet cable — A cable with an RJ45 plug that carries data as electrical signals along twisted pairs of copper wire between a device and a switch or router.

Section D: Fill in the Blanks

An Ethernet cable ends in an RJ45 plug

Ethernet sends data as electrical signals

Wires inside are twisted pairs of copper

Typical maximum cable length: 100 metres

It links a device to a switch or router

Section E: Spot the Error

D — An Ethernet cable uses twisted pairs of copper wire, not glass fibre. The line should be wire = "copper twisted pairs".

D — An Ethernet cable links a device to a network device such as a switch or router, not to a keyboard. It should be link_to = "switch".

A — Ethernet cables end in an RJ45 plug that fits an RJ45 port. HDMI is for video. It should be port = "RJ45".

C — A typical Ethernet cable run is at most about 100 metres before the signal weakens too much. It should be max_length_m = 100.

B — An Ethernet cable carries data as electrical signals along copper wire. Radio waves are used by wireless networks. It should be signal = "electrical".