net

Question 1

1

Answer 1

2

Question 2

What is the OSI Model?

Answer 2

The Open Systems Interconnection Reference Model, used as a guide for Networking.

Question 3

What mnemonic can help remember the OSI layers?

Answer 3

All People Seem To Need Data Processing (Application, Presentation, Session, Transport, Network, Data Link, Physical)

Question 4

What is Layer 1 of the OSI Model?

Answer 4

Physical Layer

Question 5

What does the Physical Layer focus on?

Answer 5

Signaling, cabling, and connectors used in Networking.

Question 6

Give examples of issues in the Physical Layer.

Answer 6

Cabling, punch-downs, loopback tests, replacing cables, swapping adapter cards, signal issues.

Question 7

What is Layer 2 of the OSI Model?

Answer 7

Data Link Layer

Question 8

What does the Data Link Layer do?

Answer 8

Facilitates communication between devices on a network through MAC addresses.

Question 9

Give examples of the Data Link Layer.

Answer 9

Ethernet adapters, wireless adapters, MAC addresses, switching layer, ethernet frame, EUI, switches.

Question 10

What is Layer 3 of the OSI Model?

Answer 10

Network Layer

Question 11

What does the Network Layer handle?

Answer 11

Routing traffic using IP addresses.

Question 12

Give examples of the Network Layer.

Answer 12

IP addresses, subnet masking, routers, packets.

Question 13

What is Layer 4 of the OSI Model?

Answer 13

Transport Layer

Question 14

What does the Transport Layer do?

Answer 14

Transports information between devices using TCP or UDP segments.

Question 15

Give examples of the Transport Layer.

Answer 15

TCP segments, UDP segments, IP packets.

Question 16

What is Layer 5 of the OSI Model?

Answer 16

Session Layer

Question 17

What does the Session Layer manage?

Answer 17

Communication sessions, including starting, stopping, and restarting.

Question 18

Give examples of the Session Layer.

Answer 18

Control protocols, tunneling protocols.

Question 19

What is Layer 6 of the OSI Model?

Answer 19

Presentation Layer

Question 20

What does the Presentation Layer handle?

Answer 20

Character encoding and formatting data for human readability.

Question 21

Give examples of the Presentation Layer.

Answer 21

Application encryption (SSL/TLS), encoding data.

Question 22

What is Layer 7 of the OSI Model?

Answer 22

Application Layer

Question 23

What does the Application Layer do?

Answer 23

Interfaces directly with the user, providing applications like webpages and email.

Question 24

Give examples of the Application Layer.

Answer 24

HTTP, FTP, DNS, POP3, webpages.

Question 25

What is a router?

Answer 25

A layer 3 device that routes data between IP subnets.

Question 26

Give examples of a router's use.

Answer 26

Connecting LANs, WANs, copper, and fiber networks.

Question 27

What is a switch?

Answer 27

A layer 2 device that forwards traffic based on MAC addresses.

Question 28

What additional utility can switches have?

Answer 28

Power over Ethernet or routing, making it a layer 3 switch.

Question 29

What is a firewall?

Answer 29

A device that filters traffic by TCP/UDP port number or application.

Question 30

What other functions can firewalls perform?

Answer 30

Create VPNs, route traffic, manage inside/outside networks.

Question 31

What are IDS/IPS?

Answer 31

Intrusion Detection/Prevention Systems monitor traffic and create alerts based on it.

Question 32

What is a load balancer?

Answer 32

A device that balances traffic across multiple servers to maintain availability.

Question 33

Give examples of load balancer utilities.

Answer 33

Caching, encryption/decryption.

Question 34

What is a proxy?

Answer 34

A device that acts as an intermediary between users and external networks.

Question 35

What functions can a proxy perform?

Answer 35

Caching, access control, URL filtering, content scanning.

Question 36

What is NAS?

Answer 36

Network Attached Storage that provides file-level access across the network.

Question 37

What is SAN?

Answer 37

Storage Area Network that provides block-level access to modify data.

Question 38

What is an Access Point?

Answer 38

A layer 2 device that extends wired networks to wireless.

Question 39

What is the purpose of a Wireless LAN Controller?

Answer 39

To manage and configure multiple access points across an infrastructure.