Networks - layers/protocols 1.3

Question 1

HTTP

Answer 1

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

Question 2

how does http work

Answer 2

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

Question 3

HTTPS

Answer 3

-HTTP but a secure version

Question 4

Ethernet

Answer 4

-A suite of protocols used with wired
networks.

Question 5

WiFi

Answer 5

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

Question 6

HTTP meaning

Answer 6

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

Question 7

FTP

Answer 7

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

Question 8

POP

Answer 8

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

Question 9

IMAP

Answer 9

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

Question 10

SMTP

Answer 10

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

Question 11

How email works

Answer 11

-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

Question 12

Transmission control protocol

Answer 12

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

Question 13

IP

Answer 13

-routes data packets from one IP address to another

Question 14

sending data

Answer 14

-application chooses best protocol to use

Question 15

Order of sending data (layers)

Answer 15

-application
-transport
-internet
-link

Question 16

Application layer

Answer 16

-applications create data to send

Question 17

Eg of protocols used in application layer

Answer 17

-SMTP
-FTP
-HTTP

Question 18

Transport layer

Answer 18

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

Question 19

Eg of protocols used in transport layer

Answer 19

-TCP
-UDP (user datagram protocol)

Question 20

Internet layer

Answer 20

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

Question 21

Eg of protocols used in Internet layer

Answer 21

IP

Question 22

Link layer

Answer 22

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

Question 23

Eg of protocols used in link layer

Answer 23

-NIC
-Cables