Network Fundamentals #1

Question 1

Something that connects devices so they can share data

Answer 1

Network

Question 2

In order for devices to communicate data to each other, they need to speak the same language. These ‘languages’ are called ______

Answer 2

Protocols

Question 3

Small network with only a few nodes (devices)

Answer 3

SOHO Network (Small Office, Home Office)

Question 4

What the devices in the network are all usually connected to.

Answer 4

Switch (Archaically called Hub)

Question 5

Large network used by corporations, multiple floors worth of devices

Answer 5

Enterprise Network

Question 6

Massive network run by an internet provider

Answer 6

Service Provider Network

Question 7

Network connecting multiple devices in a local area.

Answer 7

LAN

Question 8

Network connecting multiple devices separated by a distance.

Answer 8

WAN

Question 9

Two types of cables ( by material ) and differences

Answer 9

Copper Cable - Cheaper, used for short distances

Fiber Cable - Expensive, used for long distances

Question 10

Protocol used by wired LAN

Answer 10

Ethernet

Question 11

Parts of Ethernet Protocol dealing with how data should be formatted and sent

Answer 11

Media access control

Question 12

Parts of Ethernet Protocol that deal with things like how fast data should be sent through cable, and what types of cabling. Contrasted with media access control.

Answer 12

Physical (rules)

Question 13

Institution that designed Ethernet, and which has created numerous standards, for example 802 for LAN, and 802.3 for Ethernet, and 802.3u for 100 mbps speed.

Answer 13

IEEE (I Triple E)

Question 14

Most common copper cable, used to transmit encoding schemes which carry data

Answer 14

UTP (Unshielded Twisted Pair)

Question 15

Why are UTP cables twisted?

Answer 15

If they were parallel, they would interfere with each other.

Question 16

Are there standards for Cables?

Answer 16

Yes, CAT standards. For example CAT6 cables are thicker than CAT5 cables.

Question 17

Two types of UTP cables used to connect a computer to a network hub (like a router). Also, why are both these types not really important anymore?

Answer 17

Straight Through - Used for host and switch. The pin on one side is labelled to be for TX transmission while the other side if RX receiving.

Crossover Cable - Used for host to host. Since the pins are labelled the same way, the wires are crossed over rather than connected straight through, so the tX RX still stays.

Nowadays though, Auto-MDIX technology allows cables to change based on what they have to connect too. In fact, fixed cables are getting pretty rare.

Question 18

Difference between Single Mode and Multi Mode fiber cables

Answer 18

Single mode uses laser light, is more expensive, and goes long distances.

Multi Mode uses LED light, is cheaper, and goes short distances.

Question 19

Two main types of connectors for optical fiber cables. Dual core (full duplex).

Answer 19

SC and LC connectors

Question 20

Module that allows you to switch and swap the type of optical fiber cable you use.

Answer 20

Transceiver

Question 21

What do devices connect to in a wireless, WIFI network.

Answer 21

Wireless Access Point

Question 22

Difference between full duplex and half duplex device

Answer 22

Full duplex can send and receive at the same time, while half duplex can only do one at a time.

Question 23

Difference between MAC and IP Address

Answer 23

MAC Address is fixed, set by manufacturer, and is a physical address. IP is a network based changeable address, and is a logical address.