1. If an IPv4 datagram with a payload of 1480 bytes must be sent over a network with an MTU of 500 bytes, how many fragments will be sent? Explain. 2. When sending packets across heterogeneous...

1. If an IPv4 datagram with a payload of 1480 bytes must be sent over a network with an MTU of 500 bytes, how many fragments will be sent? Explain.

2. When sending packets across heterogeneous networks, what problem needs to be overcome with respect to the MTU and how it is handled?

3. In the Internet, where are fragments reassembled?

4. If a fragment is lost, does a receiver request a new copy? Explain.