WEB / SSH

Question 1

If you are not afraid to loose a byte (ex. a frame in a video) what protocol do you use? And what protocol do you use if you CAN’T loose a byte?

Answer 1

DCP (not important if you loose a byte).

TCP (when you don’t want to loose a byte).

Question 2

What is SSH?

Answer 2

Secure Shell. Can connect two computers/servers directly.

Question 3

What is RSH?

Answer 3

Remote Shell. Connects a shell running in remote computer.

Question 4

What is Telnet?

Answer 4

TELetype NETwork. Stimulates being in front of remote computer.

Question 5

What are the differences between HTTP :// and : ?

Answer 5

:// are hierarchical

: are flat

Question 6

All the HTTP methods (verbs) can be…

Answer 6

Safe, Idempotent or Cacheable.

Question 7

What HTTP methods (verds) are Safe?

Answer 7

GET and HEAD.

Question 8

What HTTP methods (verds) are Idempotent?

Answer 8

PUT

Question 9

What HTTP methods (verds) are Catchable?

Answer 9

POST

Question 10

What does Cacheable means?

Answer 10

Cached is controlled by client. A cacheable response is an HTTP response that can be cached, that is stored to be retrieved and used later, saving a new request to the server.

Question 11

What does Idempotent means?

Answer 11

An HTTP method is idempotent if an identical request can be made once or several times in a row with the same effect while leaving the server in the same state.