Quiz #2

Question 1

What are the three elements of communication?

Answer 1

1) Message source, or sender
2) Destination, or receiver
3) Transmission medium, channel

Question 2

Which protocol operates at Layer 1 and Layer 2 of the OSI model?

Answer 2

Ethernet protocol (MAC)

Question 3

What does MAC stand for?

Answer 3

Media Access Control Address

Question 4

What’s another word for MAC address?

Answer 4

Physical Address

Question 5

Which protocols are used at Layer 3?

Answer 5

IPv4 and IPv6

Question 6

What format are computer messages encapsulated into?

Answer 6

Frame

Question 7

What are the 3 layers of hierarchical network?

Answer 7

1) Access
2) Distribution
3) Core

Question 8

What is ARP?

Answer 8

Address Resolution Protocol - part of IPv4 protocol to convert IP address to MAC address

Question 9

What is LAN?

Answer 9

Local Area Network refers to a group of interconnected local networks that are under the same administrative control

Question 10

How many bits in an IPv4 addres?

Answer 10

32

Question 11

How many bits in an IPv6 address?

Answer 11

128

Question 12

What does the subnet mask do?

Answer 12

Signifies which part of the address is the network and which part is the host

Question 13

What is CIDR?

Answer 13

Classless Inter-Domain Routing

Question 14

What does DHCP stand for?

Answer 14

Dynamic Host Configuration Protocol

Question 15

How are packets converted from private IP addresses to public?

Answer 15

Network Address Translation

Question 16

What are the layers of the TCP/IP model?

Answer 16

1. Application
2. Transport
3. Internet
4. Network Access

Question 17

What are the layers of the OSI model?

Answer 17

7 - Application
6 - Presentation
5 - Session
4 - Transport
3 - Network
2 - Data link
1 - Physical

Question 18

What protocol is used at the application layer?

Answer 18

Hypertext Transfer Protocol (HTTP)

Question 19

What protocol is used at the transport layer?

Answer 19

Transmission Control Protocol (TCP) and User Datagram Protocol (UDP)

Question 20

What is encapsulation with messages?

Answer 20

Placing one message format in another message format

Question 21

What’s another word for frame?

Answer 21

Protocol Data Unit (PDU)

Question 22

What is the size of a frame?

Answer 22

64-1518 bytes

Question 23

What is an intranet?

Answer 23

A private LAN

Question 24

How are IPv4 addresses grouped?

Answer 24

4 octets

Question 25

How are IPv6 addresses grouped?

Answer 25

8 hextets

Question 26

What do IPv6 addresses use in place of a submet mask?

Answer 26

Prefix

Question 27

What are the private IP addresses?

Answer 27

10.0.0.0 /8
172.16.0.0 - 172.31.0.0 /16
192.168.5.5

Question 28

What is DNS?

Answer 28

Domain Name System

Question 29

What is SSH?

Answer 29

Secure shell

Question 30

What is SMTP?

Answer 30

Simple Mail Transfer Protocol

Question 31

What is POP?

Answer 31

Post Office Protocol

Question 32

What is IMAP?

Answer 32

Internet Message Access Protocol

Question 33

What is FTP?

Answer 33

File Transfer Protocol

Question 34

What is the UDP protocol?

Answer 34

User Datagram Protocol

Question 35

What layer is the UDP protocol used?

Answer 35

Transport layer

Question 36

What is the difference between TCP and UDP?

Answer 36

TCP waits for acknowledgement messages and will send lost data. UDP is a “best effort” system.

Question 37

What is a port number?

Answer 37

Identifier of what protocol to use

Question 38

What layers uses the port number between them?

Answer 38

Transport and Application

Question 39

What three protocols are used with emails?

Answer 39

SMTP, POP, IMAP