What are the factors that affect the quality of network communication? (Multiple choice)

Which are lower-layer physical devices of NFV framework? (Multiple Choice)

The DHCP protocol can allocate TCP/IP-related parameters to clients. DHCP defines multiple types of packets for this process.
Which is the encapsulation mode for these packets?

When QoS is deployed on a network to improve the quality of some services, the quality of other services must deteriorate.

Which information are included in the DHCP binding entry? (Multiple Choice)