Interfaces and Cables

Question 1

What is the name of the connector on the end of an Ethernet UTP cable?

Answer 1

RJ45

Question 2

How many pins are in an RJ45 connector?

Answer 2

8

Question 3

How many bits are in 1 byte?

Answer 3

8

Question 4

Network speeds are measured in […] per second.

Answer 4

bits

Question 5

How many bits are in 1 kilobit?

Answer 5

1,000 (one thousand)

Question 6

How many bits are in 1 megabit?

Answer 6

1,000,000 (one million)

Question 7

How many bits are in 1 gigabit?

Answer 7

1,000,000,000 (one billion)

Question 8

How many bits are in 1 terabit?

Answer 8

1,000,000,000,000 (one trillion)

Question 9

Ethernet was originally defined in the IEEE […] standards in 1983.

Answer 9

802.3

Question 10

What is the maximum length of an Ethernet UTP cable?

Answer 10

100 meters

Question 11

What is the speed of an ‘Ethernet’ connection?

Answer 11

10 Mbps

Question 12

What is the speed of a ‘FastEthernet’ connection?

Answer 12

100 Mbps

Question 13

What is the speed of a ‘Gigabit Ethernet’ connection?

Answer 13

1 Gbps

Question 14

What is the speed of a ‘10 Gig Ethernet’ connection?

Answer 14

10 Gbps

Question 15

IEEE standard […] = 10 Mbps Ethernet (10BASE-T)

Answer 15

802.3i

Question 16

IEEE standard […] = 100 Mbps Ethernet (100BASE-T)

Answer 16

802.3u

Question 17

IEEE standard […] = 1 Gbps Ethernet (1000BASE-T)

Answer 17

802.3ab

Question 18

IEEE standard […] = 10 Gbps Ethernet (10GBASE-T)

Answer 18

802.3an

Question 19

What does UTP stand for?

Answer 19

Unshielded Twisted Pair

Question 20

Why are the wire pairs in a UTP cable twisted together?

Answer 20

It protects against EMI (Electromagnetic Interference)

Question 21

How many pairs of wires are used in a 10BASE-T cable?

Answer 21

2 (=4 wires)

Question 22

How many pairs of wires are used in a 100BASE-T cable?

Answer 22

2 (=4 wires)

Question 23

How many pairs of wires are used in a 1000BASE-T cable?

Answer 23

4 (=8 wires)

Question 24

How many pairs of wires are used in a 10GBASE-T cable?

Answer 24

4 (=8 wires)

Question 25

A [...] connection allows both devices to send and receive data at the same time.

Answer 25

full-duplex

Question 26

In a FastEthernet connection, a router transmits data on which pins?

Answer 26

1 and 2

Question 27

In a FastEthernet connection, a router receives data on which pins?

Answer 27

3 and 6

Question 28

In a FastEthernet connection, a firewall transmits data on which pins?

Answer 28

1 and 2

Question 29

In a FastEthernet connection, a firewall receives data on which pins?

Answer 29

3 and 6

Question 30

In a FastEthernet connection, a PC transmits data on which pins?

Answer 30

1 and 2

Question 31

In a FastEthernet connection, a PC receives data on which pins?

Answer 31

3 and 6

Question 32

In a FastEthernet connection, a switch transmits data on which pins?

Answer 32

3 and 6

Question 33

In a FastEthernet connection, a switch receives data on which pins?

Answer 33

1 and 2

Question 34

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect a router and a switch?

Answer 34

straight-through cable

Question 35

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect a PC and a switch?

Answer 35

straight-through cable

Question 36

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect two routers together?

Answer 36

crossover cable

Question 37

If Auto MDI-X is disabled, what kind of UTP cable should be used to connect two switches together?

Answer 37

crossover cable

Question 38

What kind of cable connects a pin pair on one end of a UTP cable to the same pair?

Answer 38

straight-through cable

Question 39

What kind of cable connects a pin pair on one end of a UTP cable to the opposite pair?

Answer 39

crossover cable

Question 40

What is the name of the feature that allows a device to automatically adjust which RJ45 pin pairs it uses to transmit and receive data?

Answer 40

Auto MDI-X

Question 41

Which two pin pairs are used in a 10BASE-T or 100BASE-T connection?

Answer 41

Pair 1-2, Pair 3-6

Question 42

Which four pin pairs are used in a 1000BASE-T or 10GBASE-T connection?

Answer 42

Pair 1-2, Pair 3-6, Pair 4-5, pair 7-8

Question 43

Fiber-Optic cables are connected to [...] transceivers in a router or switch.

Answer 43

SFP (Small Form-Factor Pluggable)

Question 44

What are the two main kinds of fiber-optic cable?

Answer 44

Single-mode and multimode

Question 45

Multimode Fiber cables have a [...] fiberglass core than single-mode fiber cable

Answer 45

wider

Question 46

[...] fiber cables allow multiple angles (modes) of light waves to enter the fiber.

Answer 46

Multimode

Question 47

Which allows longer cables, single-mode or multimode fiber?

Answer 47

single-mode

Question 48

Which is cheaper, single-mode or multimode fiber?

Answer 48

multimode

Question 49

In [...] fiber cables, light travels straight through the fiberglass core at a single angle.

Answer 49

single-mode

Question 50

10GBASE-SR, 10GBASE-LR, and 10GBASE-ER were defined in the IEEE [...] standard.

Answer 50

802.3ae

Question 51

1000BASE-LX was defined in the IEEE [...] standard.

Answer 51

802.3z

Question 52

1000BASE-LX maximum cable length:

Answer 52

550 meters (multimode) 5 kilometers (single-mode)

Question 53

10GBASE-SR maximum cable length:

Answer 53

400 meters

Question 54

10GBASE-LR maximum cable length:

Answer 54

10 kilometers

Question 55

1000BASE-ER maximum cable length:

Answer 55

30 kilometers

Question 56

[...] cables emit a faint signal outside of the cable, which can be detected and

Answer 56

UTP

Question 57

[...] cables are vulnerable to EMI (electromagnetic interference)

Answer 57

UTP