interfaces and cables

Question 1

How do you connect a computer to the CLI of a network device?

Answer 1

Rollover Cable

Question 2

What can you do in privileged mode?

Answer 2

Can view configurations and change the time on the device

Question 3

How do you encrypt a password that’s been set?

Answer 3

service password-encryption

Question 4

How do you save the running config to the start up config?

Answer 4

write memory or copy running-config startup-config

Question 5

What are the informal, IEEE standard, wires used and Speed of Ethernet?

Answer 5

1. 10base-T
2. 802.3i
3. 10mbps
4. 2 pairs (4 wires)

Question 6

What are the informal, IEEE standard, wires used and Speed of Fast Ethernet?

Answer 6

1. 100base-t
2. 802.3u
3. 100mbps
4. 2 pairs (4 wires)

Question 7

What are the informal, IEEE standard, wires used and Speed of Gigabit Ethernet?

Answer 7

1. 1000base-t
2. 802.3ab
3. 1gbps
4. 4 pairs (8 wires)

Question 8

What are the informal, IEEE standard, wires used and Speed of 10 gig Ethernet?

Answer 8

1. 10gbase-t
2. 802.3an
3. 10 gpbs
4. 4 pairs (8 wires)

Question 9

UTP cables

Answer 9

Unshielded Twisted Pairs, they make up the ethernet cables. Twisting protects against Electromagnic interference

Question 10

RJ45

Answer 10

The end of a UTP/Ethernet cable

Question 11

Full Duplex

Answer 11

Data can be sent and received at the same time

Question 12

What pins do routers, firewalls, and PCs use to send and receive data?

Answer 12

Transmit: 1 & 2
Receive: 3 & 6

Question 13

What pin does a switch use to send and receive data?

Answer 13

Transmit: 3 & 6
Receive: 1 & 2

Question 14

What are the possible pairing combinations? for 2 pairs? 4 pairs?

Answer 14

1, 2 and 3,6

for 4 pairs

4, 5 and 7, 8

Question 15

Straight-through cables

Answer 15

Cables that connect to their corresponding opposite pins

Question 16

Crossover Cables

Answer 16

Cables that connect to the opposite pins (ie 1+2 -> 3+6 on other device)

Question 17

Auto MDI-X

Answer 17

Newer feature on new cables that can detect which pin their neighbour is using and avoid collision

Question 18

SFP Transceiver

Answer 18

Small form pluggable, used with fiber optic cables to plug into device

Question 19

When should you use fiber optic cables over ethernet?

Answer 19

when the distance is longer than 100m

Question 20

How do Fibre optic cables work?

Answer 20

They send light through glass cables rather than electricity

Question 21

What are the four different parts of a fibreoptic cable

Answer 21

1. Core (light is transmitted through to another core)
2. Cladding (reflect lights)
3. Protective buffer (protects fiberglass)
4. outer jacket

Question 22

Multimode fiber cable

Question 23

What’s the difference between Multimode fibre and single mode?

Answer 23

Multimode has a larger core that allows for multiple angles of light waves to enter the core while single mode only allows for one angle. Multimode is also cheaper but single mode is longer