Compare and contrast DNS and HTTP, and UDP and TCP?

Question

Need help to understand these a little bit more please.

Compare and contrast DNS and HTTP, and UDP and TCP.

Answer 1

DNS converts your requested site into an IP address for you to be able to easy surf the net. instead of memorizing IP addresses when going to websites, all you have to know is their URL.



HTTP: Hypertext Transfer Protocol It lets you surf websites.



http vs dns, you can go to a website without a dns through http as long as you know the IP address, however dns without http, page cannot be displayed or request time out. coz you dont know what service you are requesting, which in this case, http



udp is user datagram protocol. tcp is transmission control protocol. they are similar with each other but udp is considered as connection less and best effort delivery coz it doesnt have reliability features as tcp does. but the same reliability features makes tcp segments are heavier than udp.

so what?

tcp is used if you need reliable connection, like going to a website

udp is used for voip and video such as in ym, voice calls and letting someone view your webcam coz its faster



dont worry udp isnt that reliable coz it relies on the application layer for reliability

Answer 2

Compare Tcp And Udp

Answer 3

This is a little tricky. I could cut and paste all kinds of things but you more that likely wont understand.



DNS = is where a computer or server converts a domain name into an IP address.



Example. you type in www.google.com that request goes to DNS server and says what IP is google the DNS says it xxx.xxx.xxx.xxx and then your computer goes to google. Your ISP provides DNS for you at home.



HTTP is the language code of the internet.



UDP is a connection less connection. Example: Go to the store. Notice its a statement that doen't require an answer and you don't know if it was recieved.



Like a printer. You say print and the only way you know if the printer recieves it is if it prints your request.



TCP= is the oppisite Examples Hey you there? Yea! Ok do this.



Think of this in computer terms and you should be OK

Answer 4

Sounds like homework to me.



Why don't you specifically state what you don't understand?