Network Technology

Question 1

Front

Answer 1

Back

Question 2

What are the four main parts of a network?

Answer 2

End Devices, Intermediary Devices, Media, Protocols

Question 3

What are common types of networks?

Answer 3

LAN, WAN, CAN, MAN, PAN, SAN, WLAN, VPN, Intranet

Question 4

What is fault tolerance in networking?

Answer 4

The ability to continue operating properly in the event of a failure.

Question 5

What is a collision domain?

Answer 5

A network segment where data packets can collide with one another.

Question 6

What are the private IP address ranges?

Answer 6

10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16

Question 7

What is attenuation?

Answer 7

Loss of signal strength across a network due to distance or interference.

Question 8

How many bits are in IPv4 and IPv6 addresses?

Answer 8

IPv4 has 32 bits, IPv6 has 128 bits.

Question 9

What connector is used for Ethernet cables?

Answer 9

RJ45 connector with 8 pins.

Question 10

What is the purpose of networking reference models?

Answer 10

They split networking into manageable layers, simplifying understanding and standardization.

Question 11

What does OSI stand for?

Answer 11

Open Systems Interconnection

Question 12

How many layers does the OSI model have?

Answer 12

7 layers

Question 13

Name the 7 layers of the OSI model.

Answer 13

Application, Presentation, Session, Transport, Network, Data Link, Physical

Question 14

Which OSI layer manages sessions and authentication?

Answer 14

Session Layer (Layer 5)

Question 15

What happens at the Transport layer?

Answer 15

End-to-end communication is managed, including sequencing and error recovery.

Question 16

What are Protocol Data Units (PDUs) at each layer?

Answer 16

Application-Data, Transport-Segments, Network-Packets, Data Link-Frames, Physical-Bits

Question 17

How many layers does the TCP/IP model have?

Answer 17

4 layers

Question 18

What are the four layers of the TCP/IP model?

Answer 18

Application, Transport, Internet, Network Access

Question 19

What is the main difference between the OSI and TCP/IP models?

Answer 19

OSI is a theoretical model, TCP/IP is based on practical protocols.

Question 20

What does CIDR stand for?

Answer 20

Classless Inter-Domain Routing

Question 21

What is the purpose of a router?

Answer 21

To forward packets between different networks based on destination IP addresses.

Question 22

Why was IPv6 introduced?

Answer 22

To overcome the IPv4 address exhaustion and improve packet processing.

Question 23

What protocol is used to map an IP address to a MAC address?

Answer 23

Address Resolution Protocol (ARP)

Question 24

What does DHCP stand for?

Answer 24

Dynamic Host Configuration Protocol

Question 25

What command checks DHCP settings in Windows?

Answer 25

ipconfig /all

Question 26

What does 'ipconfig /release' do?

Answer 26

Releases the current DHCP-assigned IP address.

Question 27

What does 'ipconfig /renew' do?

Answer 27

Requests a new IP address from the DHCP server.

Question 28

What is encryption?

Answer 28

Changing text into a non-recognisable format to protect information.

Question 29

What is symmetric encryption?

Answer 29

Encryption where the same key is used for both encryption and decryption.

Question 30

What is asymmetric encryption?

Answer 30

Encryption using a public key to encrypt and a private key to decrypt.

Question 31

What wireless encryption method uses AES?

Answer 31

WPA2

Question 32

Why is WPA2 considered secure?

Answer 32

It uses AES with a 256-bit key, making brute-force attacks impractical.

Question 33

What is the main difference between Telnet and SSH?

Answer 33

Telnet is insecure and sends data in plain text, while SSH is secure and encrypts data.

Question 34

What is circuit switching?

Answer 34

A method where a dedicated communication path is established between two nodes.

Question 35

What is packet switching?

Answer 35

Data is broken into packets and each packet can take different paths to the destination.

Question 36

What does CSMA/CD stand for?

Answer 36

Carrier Sense Multiple Access with Collision Detection

Question 37

What is the main advantage of fiber optics over copper?

Answer 37

Higher bandwidth and longer distance with lower signal loss.

Question 38

What is the purpose of port numbers in networking?

Answer 38

They identify specific processes or services for communication.

Question 39

What are well-known ports?

Answer 39

Ports 0-1023, reserved for common services like HTTP (port 80), FTP, and SMTP.

Question 40

What tool can you use to view open TCP connections?

Answer 40

netstat