正解:D
The configuration shown in the exhibit indicates that FCIP (Fibre Channel over IP) is configured with ip-compression mode2 enabled on a Cisco MDS 9000 Series switch. This means compression is performed by using software (Option D), as mode2 refers to software-based compression in FCIP configurations. The other options are not correct based on the configuration. The switch does not attempt to make two TCP connections, as there is no tcp-connections command in the configuration. Compression is not performed by using hardware, as mode1 refers to hardware-based compression in FCIP configurations. Mode2 is not enabled by default, as the default mode for FCIP compression is none. References:
* Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide, Release 8.x - Configuring FCIP
[Cisco MDS 9000 NX-OS and SAN-OS Software], Configuring FCIP, Configuring FCIP Compression
* Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide, Release 8.x - Configuring FCIP
[Cisco MDS 9000 NX-OS and SAN-OS Software], Configuring FCIP, Configuring the Number of TCP Connections for an FCIP Interface