6. Network Devices

Question 1

What layer do routers operate at and what do they work with?

Answer 1

“Routers operate at Layer 3 (Network Layer) and work with packets

Question 2

What do switches operate at and what do they work with?

Answer 2

“Switches operate at Layer 2 (Data Link Layer) and work with frames

Question 3

What layer do hubs operate at and what do they work with?

Answer 3

“Hubs operate at Layer 1 (Physical Layer) and work with raw signals (bits)

Question 4

What layer do repeaters operate at and what do they work with?

Answer 4

“Repeaters operate at Layer 1 (Physical Layer) and work with raw signals (bits)

Question 5

What layer do bridges operate at and what do they work with?

Answer 5

“Bridges operate at Layer 2 (Data Link Layer) and work with frames

Question 6

What is the primary function of a firewall?

Answer 6

“A firewall monitors and controls incoming and outgoing network traffic based on predefined security rules

Question 7

What are the types of firewalls?

Answer 7

“The types of firewalls include packet-filtering firewalls

Question 8

What is the main difference between a router and a gateway?

Answer 8

“A router routes traffic between networks using IP addresses

Question 9

What are the key functions of a modem?

Answer 9

“A modem modulates and demodulates signals to convert digital data into analog signals for transmission over communication mediums

Question 10

What is the role of a gateway in networking?

Answer 10

“A gateway connects different networks

Question 11

What is the main function of a switch?

Answer 11

“A switch forwards frames based on MAC addresses

Question 12

How do stateful firewalls differ from packet-filtering firewalls?

Answer 12

“Stateful firewalls track the state of active connections and allow only packets that are part of an established connection

Question 13

What is the difference between a network firewall and a host-based firewall?

Answer 13

“A network firewall protects an entire network by filtering traffic at the entry/exit points

Question 14

What is the primary purpose of a proxy firewall?

Answer 14

“A proxy firewall acts as an intermediary between internal users and external networks

Question 15

What does a next-generation firewall (NGFW) include that traditional firewalls do not?

Answer 15

“NGFWs combine traditional firewall features with advanced capabilities like deep packet inspection

Question 16

What is a packet-filtering firewall?

Answer 16

“A packet-filtering firewall inspects packets at Layer 3 (Network Layer) and Layer 4 (Transport Layer)

Question 17

What is the function of a proxy server?

Answer 17

“A proxy server acts as an intermediary between clients and servers

Question 18

How does a bridge help with network segmentation?

Answer 18

“A bridge divides a network into segments

Question 19

What is the function of a cloud-based firewall?

Answer 19

“A cloud-based firewall provides network security for cloud-based resources