（）dBm is the recommended radius of a cell for a voice-ready wireless network.  

A. It fragments and encapsulates all packets in a fragmentation header.
B. Packets smaller than the fragmentation size are interleaved between the fragments of thelarger packets.
C. Packets larger than the fragmentation size are always fragmented， and cannot be interleaved，even if the traffic is voice traffic.
D. It fragments and encapsulates packets that are longer than a configured size， but does not encapsulate smaller packets inside a fragmentation header.

A. Never peer on transit links.
B. Build squares for deterministic convergence.
C. Build inverted U designs for deterministic convergence.
D. Summarize routes at the distribution to the core to limit EIGRP queries or OSPF LSA propagation.

A. It uses SNMP v1.
B. It scans devices for hardware information.
C. It scans and records the operational status of devices.
D. When the configuration of a device changes， the inventory is automatically updated.