Chapter 34

Question 1

Why we need UDP

Answer 1

If we want to access some specific applications on target computer from host computer then IP will not work and then UDP will work.

Question 2

Does UDP an end to end protocol

Answer 2

Yes

Question 3

What is the difference between ip and transport protocol

Answer 3

IP protocol are machine-to-machine protocol and transport protocol are end-to-end protocol.

Question 4

What is arbitrary interaction

Answer 4

One application on one computer interact with application on another computer or with multiple applications on another computer. This is called arbitrary interaction.

Question 5

What is connection less paradigm

Answer 5

There is no need of connection for sending messages. The gap between UDP messages are long and arbitrary and there is no need for control messages in them like in IP. There are only data messages.

Question 6

Does messages breaks into packets in UDP

Answer 6

No

Question 7

What are advantages and disadvantages for UDP

Answer 7

Advantages: Applications can depend on protocol to preserve data boundaries
Disadvantages: Each UDP message must fit into single IP datagram. It can be inefficient way.

Question 8

Does UDP best effort

Answer 8

Yes

Question 9

What are 2 environment of UDP

Answer 9

1. Error tolerant environment

2. Detect and fix error environment

Question 10

What are 4 types of arbitrary interactions

Answer 10

1. 1-to-1
2. 1-to-many
3. Many-to-1
4. Many-to-many

Question 11

What is unicast, multicast and broadcast in UDP

Answer 11

Sending message to one machine is unicast, sending message to all machines is broadcast and sending message to a specific group is multicast.

Question 12

What is the code for broadcast

Answer 12

255.255.255.255

it means all once

Question 13

What is protocol port numbers

Answer 13

Its a mechanism to identify and specify end point applications to destination computers

Question 14

What is role of port 7 in UDP

Answer 14

it is for echo messages