Networks - layers/protocols 1.3 Flashcards

1
Q

HTTP

A

-hypertext transfer protocol
-access/receiving web pages vie internet
-written in html

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2
Q

how does http work

A

-protocol requests a webpage from web server
-server sends response with webpage

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3
Q

HTTPS

A

-HTTP but a secure version

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4
Q

Ethernet

A

-A suite of protocols used with wired
networks.

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5
Q

WiFi

A

A suite of protocols used with wireless
networks. It enables the transmission of
data through radio signals.

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6
Q

HTTP meaning

A

A protocol that is used to identify, request,
and transfer web pages across the
internet.

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7
Q

FTP

A

-file transfer protocol
-protocol that deals with uploading +
downloading files from a server. Users can choose what to download and where to upload.

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8
Q

POP

A

-Used with email.
-retrieves email from the email server,
-delivers it to
your computer + then deletes
it from the email server.

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9
Q

IMAP

A

Used with email.
-retrieves the
email from the email server but also leaves
a copy of it on the remote server.

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10
Q

SMTP

A

-Used with email.
- deals with
sending an email to an email server.

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11
Q

How email works

A

-email is sent from device to mail server via SMTP
-forwarded on by other SMTP servers
-reaches destination mail server + stored
-recipient uses POP/IMAP to access email

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12
Q

Transmission control protocol

A

-TCP
-breaks up msg sent over internet into data packets
-reassembles packets
-deletes errors
-resends lost msg

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13
Q

IP

A

-routes data packets from one IP address to another

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14
Q

sending data

A

-application chooses best protocol to use

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15
Q

Order of sending data (layers)

A

-application
-transport
-internet
-link

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16
Q

Application layer

A

-applications create data to send

17
Q

Eg of protocols used in application layer

A

-SMTP
-FTP
-HTTP

18
Q

Transport layer

A

-creates connection between 2 devices
-2 computers decide on communication setting (size of packets etc)
-Data is divided + assigned packet numbers = packet switching

19
Q

Eg of protocols used in transport layer

A

-TCP
-UDP (user datagram protocol)

20
Q

Internet layer

A

-routes packets = router operate now
-source/destination written on packets

21
Q

Eg of protocols used in Internet layer

A

IP

22
Q

Link layer

A

-links data to physical network hardware (cables or device hardware)

23
Q

Eg of protocols used in link layer

A

-NIC
-Cables