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- CCNA Routing and Switching 200-125
11.
Which command would use the MAC address for the host portion of the IPv6
address on a router interface?
- A.Router(config-if)# ip address eui-64 2001:db8:1234::/64
- B.Router(config-if)# ip address 2001:db8:1234::/64 mac-address
- C.Router(config-if)# ipv6 address 2001:db8:1234::/64 eui-64
- D.Router(config-if)# ipv6 address 2001:db8:1234::/64 mac
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The command to set an EUI-64 address for the host portion of the IPv6 address on an interface is ipv6 address 2001:db8:1234::/64 eui-64 . |
12.
Which address is a EUI-64 generated address?
- A.2001:db8:33::f629:58fe:ff35:5893/64
- B.fd00:4:33::f680:45ca:ac3b:5a73/64
- C.2001:db8:aa::f654:56ff:fe34:a633/64
- D.2001:db8:17:fffe:f623::ff34:5623/64
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The EUI-64 address can always be found by looking at the last 64 bits. In between the last 64 bits of the address, you will always find fffe. |
13.
You are using the EUI-64 method of allocating the host portion of the IPv6
addresses. The MAC address of the host is f423:5634:5623. Which is the correct IP
address that will be calculated for a network ID of fd00:1:1::?
- A.fd00:0001:0001:0000:f623:56ff:fe34:5623/64
- B.fd00:0001:0001:0000:f423:56ff:fe34:5623/64
- C.fd00:0001:0001:0000:fffe:f623:5634:5623/64
- D.fd00:0001:0001:0000:f623:56ff:ff34:5623/64
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| When converting a MAC address to an EUI-64 host address, the first step is to split the MAC address into 6-byte sections of f42356 and 345623 and place fffe in between them, f423:56ff:fe34:5623. This gives you a 64-bit value comprised of a 48-bit MAC address and a 16-bit filler. You must then invert “flip” the 7th bit. Example: f4 = 1111 010 = flipped = 1111 0110 = f6. |
14.
Which command would configure a single anycast address on a router’s interface?
- A.Router(config-if)# ip address 2001:db8:1:1:1::12/64
- B.Router(config-if)# ipv6 address 2001:db8:1:1:1::12/64 anycast
- C.Router(config-if)# ipv6 anycast address 2001:db8:1:1:1::12/128
- D.Router(config-if)# ipv6 address 2001:db8:1:1:1::12/128 anycast
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The command to configure an anycast address on an interface would be ipv6 address 2001:db8:1:1:1::12/128 anycast . The /128 defines a single IP to advertise in routing tables. |
15.
Which IPv6 address type is similar to IPv4 RFC 1918 addresses?
- A.Link-local addresses
- B.Global unicast addresses
- C.EUI-64 addresses
- D.Anycast addresses
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| IPv4 RFC 1918 addresses are defined as private non-routable IP addresses. In IPv6, link-local addresses are the equivalent to RFC 1918 addresses and are non-routable. |
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