Ccna certification Practice Tests

405

 16.  C.  In IPv6, the solicited-node multicast message is used for resolution of the MAC address 

for an IPv6 address. The first 104 bits of the 128-bit IPv6 address is ff02::1:ff, and the 

last 24 bits comprise the last 24 bits of the IPv6 address that needs to be resolved. The 

solicited-node multicast message is also used for Duplicate Address Detection (DAD). All 

of the other options are incorrect.

 17.  B.  The first field after the preamble and start frame delimiter (SFD) is the destination 

MAC address. The destination MAC address is always first because switches need to 

make forwarding decisions upon reading the destination MAC address. The source MAC 

address is in field B in the exhibit. The type field is in field C in the exhibit, and the frame 

checking sequence (FCS) is in field E in the exhibit.

 18.  B.  Field C in the exhibit is the type field. The type field is used to define the upper-layer 

protocol the data belongs to. The destination MAC address in field A of the exhibit is 

used for forward filter decisions. The 7-byte preamble and start frame delimiter (SFD) of 

the frame in the exhibit are used to synchronize timing of the data. The frame checking 

sequence (FCS) is a cyclical redundancy checksum (CRC) value that can be seen in field E 

of the exhibit.

 19.  B.  The command used to reset the MAC address table is 

clear mac-address-table 

dynamic. The command reset mac address-table is incorrect. The command clear 

mac-address-table is incorrect. The command clear mac table is incorrect.

 20.  A.  The command to see all of the MAC addresses on a single interface is 

show mac 

address-table interfaces fast 0/1. This command can be entered in either 

privileged exec mode or user exec mode. The command 

show address-table 

interfaces fast 0/1 is incorrect. The command show mac interfaces fast 0/1 is 

incorrect. The command 

show address-table fast 0/1 is incorrect.

 21.  D.  The details of the output show that monitor session 1 is configured to capture interface 

Fa0/1 and VLAN 2 in both directions. The destination interface is Fa 0/2. All of the other 

options are incorrect.

 22.  C.  Under normal circumstances, when VLANs are configured, they are stored in a file 

separate from the startup or running-configuration. The VLAN database is stored in a 

file called 

vlan.dat on the flash. When decommissioning a switch, if you were to erase 

the configuration of a switch, you would also need to delete the 

vlan.dat. VLANs are 

configured in the running configuration when the switch is in VTP transparent mode. 

The VLAN configuration can then be stored for survivability of reboots in the startup 

configuration by writing the running configuration to the startup configuration. The 

vlan.dat file is not stored on the NVRAM; it is always stored on the flash.

 23.  B.  The command 

interface range gigabitethernet 1/1 - 12 will allow you 

to configure the interfaces Gigabit Ethernet 1/1 to 1/12. The command 

interface 

gigabitethernet range 1/1 - 12 is incorrect. The command interface range 

gigabitethernet 1/1 1/12 is incorrect. The command interface range 

gigabitethernet range 1/1,12 is incorrect.

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