An engineer is configuring the HO router. Which IPv6 address configuration
must be applied to
the router fa0/1 interface for the router to assign a unique 64-bit IPv6 address to itself?
A. ipv6 address 2001:DB8:0:1:C601:42FF:FE0F:7/64
B. ipv6 address 2001:DB8:0:1:C601:42FE:800F:7/64
C. ipv6 address 2001:DB8:0:1:FFFF:C601:420F:7/64
D. ipv6 address 2001:DB8:0:1:FE80:C601:420F:7/64
Answer:
A
Explanation
We must use IPv6 EUI-64 so that the router can assign a unique 64-bit IPv6 address to itself.
Therefore we get the MAC address of C601.420F.0007 and:
1. Split the MAC address in two halves (6 hex digits each) (so we have C601:42 for the first
halves and 0F:0007 for the second halves)
2.
Insert FFFE in between the two, making the interface ID.
3. Invert the seventh bit (to 1) of the interface ID if it is 0 (in this question this step is ignored as
C6 = 11000110 -> the seventh bit is already 1)
-> We get the interface ID of C601:42FF:FE0F:0007 or C601:42FF:FE0F:7 in short. We
prepend the network prefix (64 bits) and get 2001:DB8:0:1:C601:42FF:FE0F:7
Question 26
Refer to the exhibit.
An engineer is configuring a new router on the network and applied this configuration. Which
additional configuration allows the PC to obtain its IP address from a DHCP server?
A.
Configure the
ip dhcp relay information
command under interface Gi0/1
B. Configure the
ip dhcp smart-relay
command
globally on the router
C. Configure the
ip helper-address 172.16.2.2
command under interface Gi0/0
D. Configure the
ip address dhcp
command under interface Gi0/0
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