topic: network / protocols

Question 1

what are the 9 protocols to remember

Answer 1

TCP, IP, UDP, HTTP, HTTPS, IMAP, POP, SMTP, FTP

Question 2

what is a network

Answer 2

a single computer not connected to anything else is called a standalone computer
by connecting the device to another device via cable or wirelessly you have created a network

Question 3

what is an example of the biggest network

Answer 3

the internet it is the biggest network in the world

Question 4

what is a protocol

Answer 4

it allows devices to communicate
By ensuring all devices follow the same rules/ standards
so they interpret data/signals in the same way

Question 5

what are standards

Answer 5

the fundamental building blocks for product development establishing consistent protocols
they are a set of hardware and software specifications allowing manufacturers to create products that are compatible with each other

Question 6

what is the most popular standard

Answer 6

HTML - its an early standard with the world wide web for displaying web pages in browsers

Question 7

what do the TCP and IP do together

Answer 7

transmission control protocol provides an error-free transmission between two router
Internet protocol routes packets(data which has been broken down into smaller chunks) across a WAN
together they make TCP/IP protocol stack, foundation of communication over the internet

Question 8

what does the UDP do

Answer 8

user datagram protocol
uses a simple connnectionless transmission model
alternative to TCP that is without any error checking
send short messages and maintains two- way connections ideal for gaming
but less reliable than TCP

Question 9

what does the HTTP/S do

Answer 9

hypertext transfer protocol is a way for clients and servers to send and recieve requests and deliver KTML pages
/S is the same but with encryption and authentication

Question 10

what does SMTP do

Answer 10

transfers outgoing emails from email clients to servers
only sends them does not recieve them like POP and IMAP do

Question 11

what does POP do

Answer 11

retrieves emails from a mail server and transfers them to your device
removing them from the server in the process

Question 12

what does IMAP do

Answer 12

internet message access protocol
keeps emails on the mail server, allowing you to access your emails on multiple devices, while maintaining synchronocity between devices

Question 13

what is the name of the four layers of the TCP/IP stack

Answer 13

1. Application
2. Transport
3. Internet
4. Network Interface/(Data) Link/Physical

Question 14

if someone wanted to add the photo “UKstamps.jpg” how would that HTML code look like

Answer 14

(img src=”UKstamps.jpg”)
but with <> instead of the brackets

Question 15

if someone wanted to find out more about UK stamps as a link to the UK Stamp Collectors Guild website which has the URL:
http:/ukstampcollectorsguild.co.uk
how would that HTML code look like

Answer 15

(a href=”http:/ukstampcollectorsguild.co.uk”)Find out More about UK stamps(/a)
but <> instead of the brackets

Question 16

a site using styling set out as attributes in tags rather than a linked CSS file

Question 17

how to make a body tag have the styling attribute lightGreen to make the entire background of the screen light green

Answer 17

(body bgcolor = “lightGreen”)
but <> instead of ()