What is the basic idea behind packet switching?
A
Sending the entire message as one unit
B
Establishing a dedicated path before transmission
C
Dividing data into small units (packets) for transmission
D
Sending voice data only
Analysis & Theory
In packet switching, the message is broken into packets, each sent independently over the network.
Which switching technique stores the complete message at each intermediate node before forwarding?
Analysis & Theory
Message switching uses a store-and-forward approach, storing the entire message at each hop.
What is an advantage of packet switching over message switching?
A
Lower delay for large messages
B
No need for message reassembly
C
Efficient bandwidth utilization
D
Always follows the same path
Analysis & Theory
Packet switching sends smaller packets independently, leading to better bandwidth usage and faster delivery.
In packet switching, what ensures packets are reassembled in the correct order?
B
Sequence numbers in packet headers
Analysis & Theory
Sequence numbers allow the destination to correctly reassemble the original message from received packets.
Which switching technique is more suitable for bursty data like emails and web browsing?
Analysis & Theory
Packet switching handles bursty data efficiently, as it does not require a dedicated path.
What is a drawback of message switching?
C
Requires large memory to store whole messages
D
Real-time communication is very smooth
Analysis & Theory
Since whole messages are stored at each node, message switching needs significant storage resources.
Which switching method is used in the Internet?
Analysis & Theory
The Internet uses packet switching for efficient, flexible, and scalable communication.
What happens if a packet is lost during transmission in packet switching?
A
The whole message is lost
B
The receiver automatically regenerates it
C
It is retransmitted by the sender
Analysis & Theory
The network protocol (like TCP) detects loss and requests the sender to retransmit the lost packet.
Which switching technique offers better real-time performance?
Analysis & Theory
Circuit switching provides a dedicated path and consistent transmission rate, suitable for real-time applications.
In message switching, how is data transmitted?
A
In packets using sequence numbers
B
Over a fixed channel without storing
C
In complete messages using store-and-forward
Analysis & Theory
Message switching transmits full messages that are stored at each node before being forwarded.