Network Devices

Question 1

What is the purpose of a router?

Answer 1

To forward packets between different IP subnets based on destination IP addresses

Question 2

What OSI layer do routers operate at?

Answer 2

Layer 3 (Network layer)

Question 3

What is a layer 3 switch?

Answer 3

A switch that can also perform routing functions

Question 4

What is the main function of a switch?

Answer 4

To forward traffic based on destination MAC addresses within a local network

Question 5

What is an ASIC in the context of switches?

Answer 5

Application-Specific Integrated Circuit; hardware that speeds up switching

Question 6

What is Power over Ethernet (PoE)?

Answer 6

A technology that delivers both data and electrical power over Ethernet cables

Question 7

What are the three types of PoE standards mentioned?

Answer 7

PoE (15.4W), PoE+ (25.5W), PoE++ (51W or 71.3W)

Question 8

What is an unmanaged switch?

Answer 8

A switch with no configuration options; plug-and-play

Question 9

What is a managed switch?

Answer 9

A switch with advanced features like VLANs, SNMP, and port mirroring

Question 10

What is the purpose of port mirroring?

Answer 10

To copy traffic from one port to another for monitoring or analysis

Question 11

What is an access point?

Answer 11

A device that connects wireless devices to a wired network

Question 12

What is the difference between a wireless router and an access point?

Answer 12

A wireless router includes routing, switching, and security; an access point only bridges wireless and wired networks

Question 13

What is a patch panel?

Answer 13

A device that organizes and manages Ethernet cables in a network closet

Question 14

What is the purpose of a punch-down block?

Answer 14

To terminate and organize Ethernet cables from desks to a patch panel

Question 15

What is a firewall?

Answer 15

A security device that filters traffic based on rules (port numbers, applications, etc.)

Question 16

What is a next-generation firewall?

Answer 16

A firewall that filters traffic based on applications, not just port numbers

Question 17

What is a VPN concentrator?

Answer 17

A device that encrypts and decrypts VPN traffic for secure remote access

Question 18

What is a proxy server?

Answer 18

A server that acts as an intermediary between clients and servers, often for security or caching

Question 19

What is a cable modem?

Answer 19

A device that provides internet access over a cable TV network (DOCSIS)

Question 20

What does DOCSIS stand for?

Answer 20

Data Over Cable Service Interface Specification

Question 21

What is DSL?

Answer 21

Digital Subscriber Line; a technology that provides internet over telephone lines

Question 22

What is an ONT?

Answer 22

Optical Network Terminal; a device that converts fiber optic signals to Ethernet/copper

Question 23

What is a demarcation point?

Answer 23

The point where the ISP’s responsibility ends and the user’s responsibility begins

Question 24

What is a Network Interface Card (NIC)?

Answer 24

A hardware component that connects a device to a network

Question 25

What is a MAC address?

Answer 25

Media Access Control address; a unique identifier for network interfaces

Question 26

Routers forward traffic based on MAC addresses.

Answer 26

False (Routers forward traffic based on IP addresses)

Question 27

A layer 3 switch can perform routing functions.

Answer 27

True

Question 28

Unmanaged switches support VLANs.

Answer 28

False (Unmanaged switches do not support VLANs)

Question 29

Managed switches are typically more expensive than unmanaged switches.

Answer 29

True

Question 30

An access point performs routing functions.

Answer 30

False (An access point bridges wireless and wired networks)

Question 31

PoE can power devices like wireless access points and VoIP phones.

Answer 31

True

Question 32

PoE++ provides less power than PoE+.

Answer 32

False (PoE++ provides more power)

Question 33

A patch panel is used to connect devices directly to the internet.

Answer 33

False (A patch panel organizes and manages Ethernet cables)

Question 34

A firewall can act as a VPN concentrator.

Answer 34

True

Question 35

DSL provides internet access over cable TV lines.

Answer 35

False (DSL uses telephone lines)

Question 36

An ONT converts fiber optic signals to Ethernet.

Answer 36

True

Question 37

A NIC is only used in desktop computers.

Answer 37

False (NICs are used in laptops, servers, and other devices)

Question 38

DOCSIS is a standard for cable internet.

Answer 38

True

Question 39

A proxy server can cache web content.

Answer 39

True

Question 40

A demarcation point is always inside a building.

Answer 40

False (It can be inside or outside)

Question 41

PoE injectors are used to add PoE capability to non-PoE switches.

Answer 41

True

Question 42

A company wants to connect two IP subnets. What device should they use?

Answer 42

Router or layer 3 switch

Question 43

A network administrator wants to monitor traffic on a specific switch port. What feature should they use?

Answer 43

Port mirroring

Question 44

A company wants to provide wireless access in their office. What device should they install?

Answer 44

Access point

Question 45

A user wants to connect a laptop to a wired network without a built-in Ethernet port. What should they use?

Answer 45

USB or PCIe Network Interface Card (NIC)

Question 46

A company wants to power VoIP phones and wireless access points over Ethernet. What technology should they use?

Answer 46

Power over Ethernet (PoE)

Question 47

A network administrator wants to separate departments into different broadcast domains. What should they configure?

Answer 47

VLANs

Question 48

A company wants to secure their network from external threats. What device should they deploy?

Answer 48

Firewall

Question 49

A remote employee needs to securely access company resources. What should they use?

Answer 49

VPN concentrator or client-to-site VPN

Question 50

A company wants to connect their branch office to headquarters securely. What should they implement?

Answer 50

Site-to-site VPN

Question 51

A user reports slow internet speeds over DSL. What could be the cause?

Answer 51

Distance from the central office

Question 52

A company wants to provide internet access using existing cable TV infrastructure. What device should they use?

Answer 52

Cable modem (DOCSIS)

Question 53

A network administrator wants to organize Ethernet cables in a server room. What should they use?

Answer 53

Patch panel

Question 54

A company wants to convert fiber optic signals to Ethernet for their network. What device should they use?

Answer 54

Optical Network Terminal (ONT)

Question 55

A user wants to add an extra Ethernet port to their desktop. What should they install?

Answer 55

PCIe Network Interface Card (NIC)

Question 56

A company wants to filter traffic based on applications, not just port numbers. What device should they use?

Answer 56

Next-generation firewall

Question 57

A network administrator wants to provide redundancy for their switches. What should they configure?

Answer 57

Multiple managed switches with failover

Question 58

What is a cable modem?

Answer 58

A device that provides high-speed internet access using coaxial cable infrastructure (e.g., TV cables).

Question 59

What standard does a cable modem use?

Answer 59

DOCSIS (Data Over Cable Service Interface Specification).

Question 60

What is the typical speed range for a cable modem?

Answer 60

1 Gbps or higher.

Question 61

Does a cable modem share bandwidth with neighbors?

Answer 61

Yes, bandwidth is shared, which can cause slower speeds during peak usage times.

Question 62

What infrastructure does a cable modem require?

Answer 62

Cable TV infrastructure (coaxial cables).

Question 63

What is a DSL modem?

Answer 63

A device that provides internet access using telephone lines (copper wires).

Question 64

What does DSL stand for?

Answer 64

Digital Subscriber Line.

Question 65

What is the typical speed range for a DSL modem?

Answer 65

Up to 200 Mbps downstream and 20 Mbps upstream.

Question 66

Does DSL speed depend on distance?

Answer 66

Yes, speed decreases the farther you are from the central office (max ~10,000 feet).

Question 67

Is DSL bandwidth shared with neighbors?

Answer 67

No, DSL provides a dedicated line for consistent speeds.

Question 68

What infrastructure does a DSL modem require?

Answer 68

Telephone line infrastructure.

Question 69

What is the main advantage of a cable modem?

Answer 69

Faster speeds (1 Gbps or higher).

Question 70

What is the main advantage of a DSL modem?

Answer 70

Dedicated bandwidth, so speeds are more consistent and not affected by neighbors.

Question 71

Which modem is more affected by distance?

Answer 71

DSL modem.

Question 72

Which modem is more common in urban areas with cable TV?

Answer 72

Cable modem.

Question 73

Which modem is more common in rural areas with telephone lines?

Answer 73

DSL modem.