Router R1 has an interface named Gigabit Ethernet 0/1, whose MAC address has been set to 0200.0001.000A. Which of the following commands, added in R1’s Gigabit Ethernet 0/1 configuration mode, gives this router’s G0/1 interface a unicast IPv6 address of 2001:1:1:1:1:200:1:A, with a /64 prefix length?
- ipv6 address 2001:1:1:1:1:200:1:A/64
- ipv6 address 2001:1:1:1:1:200:1:A/64 eui-64
- ipv6 address 2001:1:1:1:1:200:1:A /64 eui-64
- ipv6 address 2001:1:1:1:1:200:1:A /64
- None of the other answers are correct.
Explanation: The one correct answer lists the exact same IPv6 address listed in the question, with a /64 prefix length and no spaces in the syntax of the answer. Another (incorrect) answer is identical, except that it leaves a space between the address and prefix length, which is incorrect syntax. The two answers that list the eui-64 parameter list an address and not a prefix; they should list a prefix to be correct, although neither would have resulted in the IPv6 address listed in the question.
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