The DHCP request message is sent by broadcast

Can the administrator modify the device name for the router under ()?

The switch becomes a logical switch after stacking and clustering, and Eth-Trunk across physical devices can be deployed to improve network reliability.

How many more bytes are the packets using MPLS label double-layer nesting technology than the original IP packets ()

All the devices in the picture can communicate normally. Is the corresponding relationship between the MAC address table of $WA and the port correct? () (Single-choice question)