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Computer Science 1.1.1-1.6.1 > 1.3.2 Protocols and Layers > Flashcards

1.3.2 Protocols and Layers Flashcards

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1
Q

What is a wired connection between devices?

A

Physical connection

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2
Q

What are examples of a wired connection?

A

Ethernet cable, used to connect to NICs, routers and switches

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3
Q

How many gigabytes per second can wired connection handle?

A

100

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4
Q

What is a wireless connection?

A

use of radio waves to transmit a signal or message between compatible devices.

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5
Q

What does a wireless local area network signal to modern devices?

A

2.4 to 5GHz

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6
Q

What is Bluetooth?

A

a short range, wireless, personal network technology standard (10m)

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7
Q

When is Bluetooth commonly used?

A

wireless speakers
headphones
game controllers

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8
Q

What is the need for encryption?

A

Prevents unauthorised external access

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9
Q

What does a encrypted file require to access it?

A

Key or passwords

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10
Q

What do current Wi-Fi encryption standards use?

A

Wired equivalent Privacy (WEP)
Wi-Fi-Protected Access (WPA, WPA2, WPA3)

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11
Q

What is wired equivalent privacy

A

oldest and least secure standard. Easily hacked and not recommended on modern devices.

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12
Q

What is Wi-Fi-Protected Access?

A

combines encryption with a secure password to protect WLAN access. WPA3 is most recent + secure.

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13
Q

What is an IP address?

A

Assigned to network devices to allow data transfer across the Internet using the Transmission Control Protocol (TCP)/IP.

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14
Q

Qualities of an IP address?

A

Are described as static if permanently assigned to a key network device.
Are described as dynamic if assigned by router within a network and can change each time the network is restarted.
Normally stored as four denary numbers.

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15
Q

How is it possible to use operating systems and applications across multiple devices?

A

Because manufacturers and program developers conform to certain agreed standards.

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16
Q

What do Hardware Standards include?

A

Common interface or charging sockets, motherboard compatibility and communication connectivity

17
Q

What do Software Standards include?

A

Common file types, operating systems and web browsing formats.

18
Q

What are all the Network Protocols?

A

TCP/IP
HTTP (Hypertext Transfer Protocol)
HTTPS (HTTP Secure)
FTP (File Transfer Protocol)
POP (Post Office Protocol)
IMAP (Internet Message Action Protocol)
SMTP (Simple Mail Transfer Protocol)

19
Q

What does HTTP stand for?

A

Hypertext Transfer Protocol

20
Q

What does HTTPS stand for?

A

HTTP Secure

21
Q

What does FTP stand for?

A

File Transfer Protocol

22
Q

What does POP stand for?

A

Post Office Protocol

23
Q

What does IMAP stand for?

A

Internet Message Action Protocol

24
Q

What does SMTP stand for?

A

Simple Mail Transfer Protocol

25
Q

What is TCP/IP?

A

A set of protocols that allow computers on multiple networks, including the internet, to transmit and receive data packets

26
Q

What is HTTP?

A

Rules followed by web servers and web clients, or browsers, which host, and present websites based on our requests

27
Q

What is HTTPS?

A

Encrypts communication between server and client – makes secure online shopping and banking possible

28
Q

What is FTP?

A

Used to connect clients and servers across a network to exchange files. Traditionally used to upload files to a web server

29
Q

What is POP?

A

Used to log in to and retrieve email messages from a mail server. When connected, all messages are downloaded to that device.

30
Q

What is IMAP?

A

Allow access to an email server but, rather than downloading messages, they are simply read. Allows synchronised access from multiple devices, unlike POP.

31
Q

What is SMTP?

A

Used to send emails messages to an email server rather than to receive messages

32
Q

What are layers?

A

set of protocols with specific functions.

33
Q

What layers can data be transmitted between?

A

Adjacent layers

34
Q

What is an Application Layer?

A

Data relevant to web browsers and email clients – HTTP, FTP, SMTP

35
Q

What is a Transport Layer?

A

Ensures that data is sent and received correctly between network hosts - TCP

36
Q

What is an Internet/Network Layer?

A

Communicates the IP addresses of all devices used in data traffic between network routers - IP

37
Q

What is a Data Link Layer?

A

Concerned with physical data transfer over cables - Ethernet

Computer Science 1.1.1-1.6.1 (16 decks)

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