Networking basics

Question 1

Define Network

Answer 1

Nodes Connected together to exchange data, audio, storage, video, and management.

Question 2

A Network needs what to be sustainable?

Answer 2

High Bandwidth, Low latency, and scalable for growth.

Question 3

What are Computing, Storage, and management nodes?

Answer 3

Source or destination of traffic.

Question 4

What is a NIC?

Answer 4

Network Interface Card.

Question 5

Example of a NIC?

Answer 5

End nodes such as Wifi card/ Ethernet port.

Question 6

What is the path of an end node?

Answer 6

Cable> Switchboard

Question 7

To have nodes communicate they need the same ________ ________.

Answer 7

Communication Protocols.

Question 8

What is a protocol?

Answer 8

A Protocol defines the rule set of communication.

Question 9

4 examples of Protocols

Answer 9

1. How to set up
2. How/why it terminates
3. The message format
4. How errors are handeled

Question 10

__________ _________ Is a group of __________ that run concurrently to implement network communications breaking them down into layers.

Answer 10

Protocol Suites/ Protocols

Question 11

What does OSI model stand for?

Answer 11

Open Systems Interconnection

Question 12

Define OSI model.

Answer 12

ISO standard model that describes 7 layers that computer systems used to communicate over a network. Generic protocol independent standard. Adopted world wide in 1980’s.

Question 13

What layers refer to OSI layers?

Answer 13

Layer 2 & Layer 3 (IP)

Question 14

TCP/IP models implement ___ _______ due to what?

Answer 14

OSI Model. Due to them having a suite of protocols that enable end to end data communication services.

Question 15

What is a TCP/IP?

Answer 15

The physical data link combined as a network layer- with NO presentation or session layers- Defines how computers should be connected to the internet and how data is transmitted between them

Question 16

TCP/IP Suite is what?

Answer 16

Is a set of communication protocols used on the internet

Question 17

TCIP has _____ Layers while OSI model has _____ Layers.

Answer 17

4 layers/ 7 layers

Question 18

Internet layer protocols= _________ & ________ = Layer 3

Answer 18

IPv4 & IPv6

Question 19

Transport layer protocols= _________ & __________= Layer 4

Answer 19

TCP & UDP

Question 20

Application layer protocols= __________, ___________, & __________= Layer 7

Answer 20

HTTP, FTP, & EVT

Question 21

What is in the network access layer?

Answer 21

Ethernet

Question 22

Sending application Creates message that are passed to a production line> Lower layers which add relevant data called?

Answer 22

Encapsulating

Question 23

Whats a header?

Answer 23

Supplemental data placed at the beginning of a block of data.

Question 24

What does a Header do?

Answer 24

When transmitted header data is used at the receiving side to extract the data from the encapsulated data packet.

Question 25

What happens at the end of the Encapsulated process?

Answer 25

The data is transmitted on the wire.

Question 26

What layer is Message associated with?

Answer 26

Application Layer

Question 27

A Message is ___________ at lower layers (Transport layer)

Answer 27

Encapsulated

Question 28

Transport layer adds Layer ____ (TCP & UDP) that includes fields like port numbers that are relevant for transport layer processing @ receiving nodes.

Answer 28

4

Question 29

A Message that is encapsulated with layer 4 header is called what? (2 options)

Answer 29

TCP Segment/ UDP Datagram

Question 30

TCP Segment/ UDP datagram > Internet layer & further encapsulated with layer ___ Header containing things like ________ _________ ________ __________.

Answer 30

3/ Source Destination IP Address

Question 31

Layer 3 PDUs are called what?

Answer 31

Packets

Question 32

Define Packets.

Answer 32

Packets are routed in the network by layer 3 devices

Question 33

Packets passed down the data link layer add a layer _______ Header.

Answer 33

2

Question 34

Layer 2 PDUs are called_______.

Answer 34

Frames

Question 35

What's are the most important values in the data link layer header?

Answer 35

Source & Destination Mac address

Question 36

What are layer 2 devices also called?

Answer 36

Switches

Question 37

Frames are forwarded to> ________ __________ by layer 2 devices/switches. The frame is then transferred to the physical layer (Layer ______).

Answer 37

Local network/ layer 1

Question 38

What is a that has been transferred to layer 1 & has been converted into a what?

Answer 38

Stream of bits

Question 39

After a frame is transferred to the physical layer & converted into a __________ _____ _________ it is then placed on a network medium for transmission.

Answer 39

Stream of bits

Question 40

FTP is what layer?

Answer 40

Application layer