Flashcards

Question 1

A user connects their laptop to a Wi-Fi network in a coffee shop.

Which network component is responsible for managing the wireless connection?

Answer 1

Access Point

Question 2

A university campus has multiple buildings connected by underground fiber-optic cables.

Which network component manages the flow of data between these buildings?

Answer 2

Router

Question 3

What is the primary function of a router?

Answer 3

To determine the best path for transmitting data between networks.

Question 4

At which OSI model layer do routers operate?

Answer 4

Layer 3 – the Network Layer.

Question 5

What type of address do routers use to make forwarding decisions?

Answer 5

IP addresses.

Question 6

How do routers “learn” about new routes?

Answer 6

By exchanging routing tables with other routers.

Question 7

What is a routing table?

Answer 7

A table containing information about network paths and routes used by routers.

Question 8

Can routers forward broadcast packets?

Answer 8

No, routers do not forward broadcast packets; they create broadcast domain boundaries.

Question 9

What is the difference between routers and switches?

Answer 9

Routers connect networks, while switches connect devices within a network.

Question 10

What is meant by “distance” in routing decisions?

Answer 10

The number of routers (hops) between the source and the destination.

Question 11

What are two key characteristics routers consider when choosing a path?

Answer 11

Distance and network congestion.

Question 12

Why are routers necessary between LANs across a WAN?

Answer 12

Because only routers can route based on IP addresses, which is required across different networks.

Question 13

What types of networks and cabling can routers support?

Answer 13

LANs, WANs, copper, and fiber – as long as they use TCP/IP.

Question 14

Do routers care about individual computers on a network?

Answer 14

No, they are concerned with networks, not individual devices.

Question 15

What does the term “modem” stand for?

Answer 15

Modem is a contraction of “modulate” and “demodulate,” referring to converting analog signals to digital and vice versa.

Question 16

What was the primary function of early modems?

Answer 16

To connect to the Internet using analog telephone lines by converting signals between analog and digital formats.

Question 17

What is a dial-up modem?

Answer 17

A device that connected a computer to the Internet using a telephone line and required making a phone call to an ISP.

Question 18

What were two major downsides of dial-up Internet?

Answer 18

Slow speeds (max 56 kbps) and inability to use the phone line while connected.

Question 19

What does DSL stand for?

Answer 19

Digital Subscriber Line.

Question 20

How did DSL improve on dial-up?

Answer 20

It offered much faster speeds and allowed simultaneous Internet and phone use by using different frequencies.

Question 21

Why are DSL devices still referred to as “modems”?

Answer 21

Because they perform similar functions, even though modulation/demodulation isn’t strictly necessary for digital signals.

Question 22

What additional feature did some later DSL modems include?

Answer 22

Built-in Wi-Fi capabilities.

Question 23

What type of line does a cable modem use for Internet access?

Answer 23

Coaxial cable TV lines.

Question 24

What is one major benefit of cable modems over DSL and dial-up?

Answer 24

Cable modems provide “always-on” Internet connections with higher speeds.

Question 25

Can you use TV and the Internet at the same time with a cable modem?

Answer 25

Yes, because it uses different frequencies than TV signals.

Question 26

Why did dial-up modems become obsolete?

Answer 26

DSL and cable modems offered much faster speeds and more convenience.

Question 27

Why might someone still encounter a dial-up modem today?

Answer 27

They might still be used in rural areas where DSL or cable access isn’t available.

Question 29

What are the three types of wireless networking hardware discussed in the video?

Answer 29

Wireless access point, extender, and repeater.

Question 30

Do access points, extenders, or repeaters provide primary internet access?

Answer 30

No, they extend or enhance the wireless network but do not provide primary internet access.

Question 31

What is a wireless access point?

Answer 31

A device that connects to a wired network and provides wireless access to it.

Question 32

What is Power over Ethernet (PoE)?

Answer 32

A technology that powers devices like wireless access points using the Ethernet cable.

Question 33

Where are wireless access points commonly used?

Answer 33

In large environments like hotels or airports to support many wireless clients.

Question 34

What is a wireless repeater?

Answer 34

A device that rebroadcasts an existing wireless signal to extend its range.

Question 35

What is the key function of a repeater on a wired network?

Answer 35

To amplify a degraded signal and increase the effective length of the cable.

Question 36

How does a wireless repeater differ from a wireless extender?

Answer 36

A repeater rebroadcasts the existing network, while an extender creates a new wireless network.

Question 37

What is an SSID?

Answer 37

Service Set Identifier – the name of a wireless network.

Question 38

What happens to the SSID when using a repeater?

Answer 38

It remains the same as the original network.

Question 39

What happens to the SSID when using an extender?

Answer 39

It creates a new SSID, like 'myhome_ext'.

Question 40

Why might extenders be slightly harder to configure than repeaters?

Answer 40

Because they create a new network, making setup slightly more complex.

Question 41

Can extenders be wired to the original network?

Answer 41

Yes, which allows greater placement flexibility and range extension.

Question 42

What is the main advantage of using multiple access points?

Answer 42

To increase client capacity and wireless range in large environments.

Question 43

Which device type is most often used in home environments to extend Wi-Fi?

Answer 43

Repeaters, due to their ease of setup and cost-effectiveness.

Question 44

What does LAN stand for?

Answer 44

Local Area Network

Question 45

What is the main purpose of a LAN?

Answer 45

To connect devices to allow sharing of data and resources within a small geographic area.

Question 46

What type of IP addressing do LANs typically use?

Answer 46

Private addressing schemes.

Question 47

Do LAN packets leave the network?

Answer 47

No, LAN packets never leave the LAN.

Question 48

What device typically connects systems in a LAN?

Answer 48

A switch (though hubs may still exist in rare cases).

Question 49

How does the speed of a LAN compare to other network types?

Answer 49

LANs are the fastest type of network.

Question 50

Are LANs easy to set up and maintain?

Answer 50

Yes, they are relatively easy to design and maintain.

Question 51

What does MAN stand for?

Answer 51

Metropolitan Area Network

Question 52

What is the typical size of a MAN compared to LAN and WAN?

Answer 52

Larger than a LAN, but smaller than a WAN.

Question 53

Give two examples of MAN implementations.

Answer 53

Hospitals in a city or military bases in a region.

Question 54

What is the typical purpose of a MAN?

Answer 54

To connect LANs across a city or region for high-speed communication.

Question 55

Are MANs easy to design and maintain?

Answer 55

No, they are fairly hard to design and maintain.

Question 56

Why might an organization manage its own MAN instead of using a provider?

Answer 56

For security reasons, such as in military networks.

Question 57

Are MANs typically fault-tolerant?

Answer 57

Not very; they often lack redundant connections.

Question 58

What are two drawbacks of MANs?

Answer 58

Higher congestion and lower fault tolerance.

Question 59

What does WAN stand for?

Answer 59

Wide Area Network

Question 60

How large is the area covered by a WAN?

Answer 60

It can cover entire countries or even span the globe.

Question 61

Are WANs fast compared to LANs?

Answer 61

No, even high-speed WANs are slower than LANs—often about 1/10 the speed.

Question 62

What are the two main types of WANs?

Answer 62

Switched WAN and Point-to-Point WAN.

Question 63

What is a switched WAN?

Answer 63

A WAN that allows dynamic switching between multiple endpoints.

Question 64

What is a point-to-point WAN?

Answer 64

A direct connection between two fixed endpoints.

Question 65

What challenges can WANs face due to distance?

Answer 65

High propagation delay and slower data transmission.

Question 66

What mediums can carry WAN data?

Answer 66

Optical fiber, microwaves, and satellites.

Question 67

What is an example of a delay issue in WANs?

Answer 67

Delayed database commit reflection between geographically separated sites.

Question 68

What is the primary difference between LAN, MAN, and WAN in terms of scale?

Answer 68

LAN: Small area (e.g., office or building); MAN: Medium area (e.g., city or between cities); WAN: Large area (e.g., country or global)