DBMS

Question 1

How many layers of OSI

Answer 1

7

Question 2

year?

Answer 2

1984

Question 3

name the layers

Answer 3

Application
Presentation
Session
Transport
Network
Data Link
Physical

Question 4

application layer is used by?

Answer 4

network applications
browser that use internet such as chrome

Question 5

protocols of application layer?

Answer 5

HTTP - web surfing
FTP - file transfer
SMTP - email sending
Telnet - virtual terminals

Question 6

full from of HTTP

Answer 6

hyper text transfer

Question 7

FTP?

Answer 7

File Transfer Protocol

Question 8

SMTP?

Answer 8

Simple mail transfer protocol

Question 9

use of presentation layer

Answer 9

receives data from app layer in from of numbers and char and presentation layer converts this data to machine understandatble binary format

Question 10

three basic func of presentation layer

Answer 10

translation
data compression
encryption/decryption

Question 11

which layer acts a traanslator for app and network layer?

Answer 11

presentation layer

Question 12

presentation layer converts ASCII to?

Answer 12

EBCDIC

Question 13

presentation layer uses what protocols for encryption

Answer 13

SSL/TLS

Question 14

real life examples of presentation layer?

Answer 14

streaming services
web browsing

Question 15

what is session layer?

Answer 15

manages communication between two devices
setting up and managing connections enabling sending and receiving of data, followed by termination of sessions or connections

Question 16

what are main fuctions of session layer?

Answer 16

authentication
authorization
session manmagement

Question 17

use of transport layer?

Answer 17

controls the reliability of communication

Question 18

three func of transport layer

Answer 18

segmentation
flow control
error control

Question 19

what does segmentation do
?

Answer 19

it divides the data received from session layer into smaller segments

Question 20

what does each segment contain

Answer 20

sequence number and port number

Question 21

use of port number?

Answer 21

help direct each segemtn to correct application such a chrome , firefox

Question 22

use of sequence number?

Answer 22

helps re-arrange segments in correct order

Question 23

what is flow control

Answer 23

the transport layer controls the amount of data being transmitted

Question 24

error control in transport layer

Answer 24

if some data is missing at the receivers end this layer uses automatic repeat request to re transmit the lost or corrupted data

Question 25

what are protocols of transport layer

Answer 25

TCP
UDP

Question 26

Which is faster TCP UDP

Answer 26

UDP

Question 27

TCP

Answer 27

connection oriented

Question 28

UDP

Answer 28

connection less oriented

Question 29

which provides feedback when data received? TCP UDP

Answer 29

TCP

Question 30

when s TCP used

Answer 30

where full data is must like WWW

Question 31

when is UDP used?

Answer 31

video games
movies streaming

Question 32

transport layer send data segments to

Answer 32

network layer

Question 33

what does network layer do with received segemnts from transport layer

Answer 33

transmits these segments from one PC to another located in different networks

Question 34

what are data units in network layer called?

Answer 34

packets

Question 35

what are functions of network layer

Answer 35

logical addressing path determination
routing

Question 36

network layer assigns

Answer 36

IP add to receiver and sender for each segment

Question 37

why are IP add assignmend

Answer 37

so that each data packet can reach correct dest