Network Topologies, Protocols & Layers

Question 1

What are the Methods of Connection?

Answer 1

Wired and wireless

Question 2

What are the Characteristics of Wired Connections?

Answer 2

• Faster
• Can Send Large Quantities of data
• Secure

Question 3

What are the Characteristics of Wireless Connections?

Answer 3

• Not as Secure

- Used by Portable Devices

Question 4

What is WI-FI?

Answer 4

Uses wireless frequencies 2.4GHz or 5GHz wavebands to send data through separate channels

Question 5

What is Bluetooth?

Answer 5

Short range wireless connection

Question 6

What is Standards?

Answer 6

Allows hardware & software to interact across different manufacturers

Question 7

What are Protocols?

Answer 7

The rules for transferring data.

Every device has a MAC address so that is can be identified on a network

Question 8

What are IP addresses?

Answer 8

Used when sending data between networks.

It’s a unique strong set of characters that identifies each device when sending data over the internet using IP

Question 9

What is TCP/IP?

Answer 9

Used to send data between networks in packets

Question 10

What is Transmission Control Protocol (TCP)?

Answer 10

Splits the data into packets and re-assembles. Checks data is sent correctly

Question 11

What is Internet Protocol (IP)?

Answer 11

Does the packet switching

Question 12

What does HTTP stand for?

Answer 12

Hyper Text Transfer Protocol

Question 13

What is HTTP (Hyper Text Transfer Protocol) used for?

Answer 13

For accessing websites

Question 14

What is HTTPS? (Hyper Text Transfer Protocol Secure)

Answer 14

The secure version of HTTP

Question 15

What is File Transfer Protocol (FTP)?

Answer 15

Moves files between devices

Question 16

What is Post Office Protocol (POP3)?

Answer 16

Retrieves emails from server. Once you download the email, the server copy is deleted

Question 17

What is Internet Message Access Protocol (IMAP)?

Answer 17

Retrieves email from server. Email is kept on server, you see copy

Question 18

What is Simple Mail Transfer Protocol (SMTP)?

Answer 18

Sends emails

Question 19

What does TCP stand for?

Answer 19

Transmission Control Protocol

Question 20

What does IP stand for?

Answer 20

Internet Protocol

Question 21

What does FTP stand for?

Answer 21

File Transfer Protocol

Question 22

What does POP3 stand for?

Answer 22

Post Office Protocol

Question 23

What does IMAP stand for?

Answer 23

Internet Message Access Protocol

Question 24

What does SMTP stand for?

Answer 24

Simple Mail Transfer Protocol

Question 25

What does HTTPS stand for?

Answer 25

Hyper Text Transfer Protocol Secure

Question 26

What is Packet Switching?

Answer 26

- Data split into packets and numbered in order - Each packet sent the fastest route across internet by routers, means packets can take different routes and arrive out of order - Packet numbers are used to put them in order - If packets are missing, a timeout message is sent - Once all have arrived, a receipt confirmation is sent to device that send them

Question 27

What does DNS stand for?

Answer 27

Domain Name Server

Question 28

What does a Domain Name Server (DNS) do?

Answer 28

Stores the IP address and URL of the website, matches the URL and IP address and sends back to your computer the IP address which then sends a request to web server for that file.

Question 29

What is Hosting?

Answer 29

Computer that stores a particular resource

Question 30

What is the Cloud?

Answer 30

Storage of programs and data on a server anywhere in the world, allows access from anywhere

Question 31

What is a Webserver?

Answer 31

Stores Webpages / HTML Pages

Question 32

What is a Client?

Answer 32

Requests data from a server

Question 33

What is Encryption?

Answer 33

Data is scrambled so that it cannot be understood if intercepted It can only be decrypted with a key Secures data as it is transferred across the network

Question 34

What are Network Protocols Divided into?

Answer 34

Layers, so that protocols with similar functions are grouped together

Question 35

What is Layer 1 called?

Answer 35

Data Link

Question 36

What is Layer 2 called?

Answer 36

Network

Question 37

What is Layer 3 called?

Answer 37

Transport

Question 38

What is Layer 4 called?

Answer 38

Application

Question 39

What happens in Layer 1: Data Link?

Answer 39

- Sending Data over a Physical Network | - Ethernet

Question 40

What happens in Layer 2: Network?

Answer 40

- Direct Data Packets Between Networks | - IP

Question 41

What happens in Layer 3: Transport?

Answer 41

- Control the Flow of Data | - TPC

Question 42

What happens in Layer 4: Application?

Answer 42

- Turn Data into Applications or Websites | - HTTP, FTP, SMTP

Question 43

What are the Pros of Cloud Storage?

Answer 43

- Accessibly: Can be accessed from anywhere with an internet connection - Cost Savings: Little or no cost for a small organisation - Disaster Recovery: Emergency backup - Scalability: Only pay for storage you need - Storage Immortality: Opportunity to bypass risk of purchasing hardware that will soon be obsolete

Question 44

What are the Cons of Cloud Storage?

Answer 44

- Security and Privacy in the Cloud: Concerns with value and important data being stored remotely - Bandwidth Limitations: bandwidth allowance - Vulnerability to Attacks: external hack attacks - Data Management: hassle, as cloud storage systems have their structures - Lifetime Costs: Price cost over the years might increase and tend to add up