Protocols

Question 1

COMMUNICATION PROTOCOLS

Answer 1

-A set of rules
-To allow different devices
-Using different technologies
-To communicate

Question 2

7 LAYERS IN OSI MODEL

Answer 2

-APPLICATION SET-
Application
Presentation
Session

-TRANSPORT SET-
Transport
Network
Data Link
Physical

Question 3

APPLICATION LAYER

Answer 3

-Presents information to end user
-Deals with likes of data transfer/operating system functions and end user interface
-Interacts with presentation layer

Question 4

PRESENTATION LAYER

Answer 4

-Converts information to display data in correct format
-Data encryption
-Data compression

Question 5

SESSION LAYER

Answer 5

-Opens a temporary channel between the WAN and application for communication

Question 6

TRANSPORT LAYER

Answer 6

-Splits data into packets
-Packets sent on different routes to their destination
-Packets may arrive in different orders than sent in
-Packets reassembled at destination

Question 7

NETWORK LAYER

Answer 7

-Works out best route for packets to use
-Reads addresses of incoming packets to a computer and lets them through or blocks them depending on if they are intended for the specific computer

Question 8

DATA LINK LAYER

Answer 8

-Deals with functions such as error detection and correcting
-Creates data blocks
-Converts outgoing packets into series of bits

Question 9

PHYSICAL LAYER

Answer 9

-Converts packets of data into physical form for transmission
-Such as light pulses
-Radio signals
-Electrical signals

Question 10

NOTE: ALWAYS SPECIFY THAT A SPECIFIC LAYER SHARES INFORMATION WITH THE LAYERS ABOVE AND BELOW IT FIRST

Answer 10

NOTE: ALWAYS SPECIFY THAT A SPECIFIC LAYER SHARES INFORMATION WITH THE LAYERS ABOVE AND BELOW IT FIRST