Packet Switching Concepts and Processes

The video explains packet switching, a method of data transmission where data is broken into packets, each taking independent routes to the destination. It covers the process, advantages, and disadvantages, such as high data rates and potential delays. Advanced concepts like hop and time to live fields are also discussed to prevent packet loss.

What should you do before watching the packet switching video?

• Attend a live lecture on routers

• Complete a quiz on data transmission

• Watch the video on packet construction

• Read a book on networking

What is the first step in the packet switching process?

• Assigning sequence numbers

• Breaking data into packets

• Reordering packets at the destination

• Routing packets independently

How do packets choose their routes in a network?

• Following a fixed path

• According to the sequence number

• Based on the shortest path

• Depending on route congestion

What role do routers play in packet switching?

• They reorder packets at the destination

• They control the route each packet takes

• They ensure packets are sent in order

• They assign sequence numbers to packets

What is one advantage of packet switching?

• It guarantees real-time streaming

• It requires a dedicated communication channel

• It is immune to packet loss

• It allows for high data transmission rates

What is a disadvantage of packet switching?

• It is not suitable for high data rates

• It requires a single communication channel

• Packets always arrive in order

• There can be delays while reordering packets

Why might packets need to be resent in packet switching?

• They are always sent in order

• They can become lost on route

• They are never lost

• They are always received correctly

What field is added to a packet to prevent it from getting lost indefinitely?

• Sequence number

• Time to live

• Destination address

• Error check

What happens when the 'time to live' field of a packet reaches zero?

• The packet is rerouted

• The packet is prioritized

• The packet is deleted

• The packet is sent back to the source

What is the purpose of the 'time to live' field in a packet?

• To increase the packet's priority

• To ensure the packet reaches its destination

• To assign a sequence number to the packet

• To limit the packet's lifespan in the network