switching techniques

Question 1

What is the Router?

Answer 1

path between two and system choose the best shortest free path

Question 2

Data communication network must be able to select an appropriate bath for each required connection (true or false)

Answer 2

true

Question 3

Is the most fimilar technique used to build communication network

Answer 3

Circuit switching

Question 4

Circuit switching is used for:

Answer 4

Ordinary telephone calls

Question 5

Circuit Switching is direct or indirect connection

Answer 5

Circuit switching is direct connection must be between two line communication

Question 6

Multiplexing is used in circuit switching, what is multiplexing

Answer 6

it is to make it more efficient.

Each line cancer birth many user

Question 7

Circuit switching stages

Answer 7

1. set-up phase, Make connection.
2. Data exchange.
3. release line the circuit is disconnected.

Question 8

Set up face connection steps:

Answer 8

Request connection
indication
confirm
response

Question 9

Advantages of circuit switching

Answer 9

1. Communication process without delay ‏يعني كان الشخص جنبي
2. It gives fix bandwidth process not variable bandwidth ‏
   يعني إنك تقوم باستخدامها كلها
3. no addressing need,because it’s directions path
   ‏لانه فيها المسار مباشر فيتم حجز المسار بشكل كامل

Question 10

To make connection you have to

Answer 10

Establish physical circuit (Establishment to connection between End user)

Question 11

Circuit switching disadvantages

Answer 11

1. required establishment time.
2. waste is time in messaging.
3. Only two users, not efficient

Question 12

Message switching called

Answer 12

Store ( receive) and forward (Send)

Question 13

Message switching is direct or indirect

Answer 13

indirect, message Switching is data communication without Direct connectivity
It doesn’t use dedicated point-to-point link point

Question 14

Explain how message switching work

Answer 14

Complete message sent from A to B when the link become Available, messages stored at B until the next line and another queuing delay before it can be forwarded, it’s repeat this process until bitch destination

Question 15

Disadvantages of message switching

Answer 15

-Bigger messages of occupy longer time
-Queuing delay very high
-error in sending. فقد المسجات
line busy at long time-

Question 16

Message switching the data is divided two messages true or false

Answer 16

true

Question 17

Queueing delay is

Answer 17

The times that requires to store message

Question 18

Most videos for data communication

Answer 18

Packet switching

Question 19

Similar to message switching using short messages

Answer 19

Packet switching

Question 20

‏آلية عمل Packet switching

Answer 20

Breakdown data into smaller units, but with a predefined header

Question 21

Advantages of packet switching

Answer 21

1. allow send or receive at the same time using pipelining.

2. Reduce delay

Question 22

pipelining:

Answer 22

technique that support multi users

Question 23

all modern technique used:

Answer 23

Bucket switch, break down the whole message

Question 24

Message switch set up delay or replaced by

Answer 24

queuing delay

Question 25

Store and forward why

Answer 25

Because the message are stored at intermediate nodes and routers to their destination

Question 26

Advantage of breakdown message into packets

Answer 26

1. Reduce queuing delay 2. support many user 3. Don’t need baths to use for Connection 4. Operation of sending will be in Short time

Question 27

What’s happen if the link is not available in packet switch

Answer 27

The packet is blessed in the queue until become free

Question 28

propagation delay

Answer 28

Is the time required to transfer message from source to destination