Latest 642-902 Pass4sure Free Tests 211-220




What happens when an IPv6 enabled router running 6to4 must send a packet to a remote destination and the next hop is the address of 2002::/16?


A.       The IPv6 packet has its header removed and replaced with an IPv4 header

B.       The IPv6 packet is encapsulated in an IPv4 packet using an IPv4 protocol type of 41

C.       The IPv6 packet is dropped because that destination is unable to route IPv6 packets

D.      The packet is tagged with an IPv6 header and the IPv6 prefix is included


Correct Answer: B




What are three IPv6 transition mechanisms? (Choose three)


A.       6to4 tunneling

B.       VPN tunneling

C.       GRE tunneling

D.      ISATAP tunneling

E.       PPP tunneling

F.        Teredo tunneling


Correct Answer: ADF




What are two rules for compacting IPv6 addresses? (Choose two.)


A.       Every 16-bit segment segment that consists of all zeroes can be represented with a single colon.

B.       The trailing zeroes in any 16-bit segment do not have to be written.

C.       The leading zeroes in any 16-bit segment do not have to be written.

D.       Any single, continuous string of one or more 16-bit segments that consists of all zeroes can be represented with a double colon.

E.        The maximum number of times a double colon can replace a 16-bit segment that consists of all zeroes is two.

F.        Two zeroes in the middle of any 16-bit segment do not have to be written.


Correct Answer: CD




What is the difference between the IPv6 addresses ::/0 and ::/128?


A.       ::/0 is the default route, and ::/128 is the unspecified address.

B.       ::/0 is the unicast address, and ::/128 is the anycast address.

C.       ::/0 is the anycast address, and ::/128 is the multicast address.

D.      ::/0 is the unicast address, and ::/128 is the multicast address.

E.       ::/0 is the unspecified address, and ::/128 is the multicast address.

F.        ::/0 is the anycast address, and ::/128 is the default address.


Correct Answer: A




Using the rules for IPv6 addressing, how can the address

2031:0000:240F:0000:0000:09C0:123A:121B be rewritten?


A.       2031:0:240F::09C0:123A:121B

B.       2031::240F::09C0:123A:121B

C.       2031::240F:9C0::123A:121B

D.      2031::240F:::09C0:123A:121B


Correct Answer: A




Refer to the exhibit.



What is required to complete the IPv6 routing configurations shown?


A.       Interface authentication must be configured.

B.       The routing processes must be configured with an area ID.

C.       IP unicast routing must be enabled.

D.      IPv4 addresses must be applied to the interfaces.


Correct Answer: C




Which functionality is required within an IP router that is situated at the boundary of an IPv4 network and an IPv6 network to allow communication between IPv6-only and IPv4-only nodes?


A.       Autoconfiguration

B.       Automatic 6to4 Tunnel

C.       Automatic 6to4 Relay

D.      Network Address Translator-Protocol Translator (NAT-PT)

E.       Intrasite Automatic Tunnel Address Protocol (ISATAP)


Correct Answer: D




During the IPv6 auto configuration, what does the device append to the 64-bit prefix that it receives from the router to create its IPv6 address?


A.       a pseudorandom generated number

B.       its locally configured IPv4 address

C.       the DHCP-supplied device ID

D.      its MAC address


Correct Answer: D




Refer to the exhibit.



Which statement about this neighbor of R1 is true?

A.       OSPFv3 adjacency has been lost, which causes the neighbor to be considered Stale.

B.       Aggregate global addresses are always used between IPv6 neighbors.

C.       OSPFv3 adjacency will not work between link-local addresses.

D.      R1 used ICMP to learn about this neighbor.


Correct Answer: D




Which three are characteristics of IPv6? (Choose three.)


A.       An IPv6 address is 128 bits long.

B.       An IPv6 header is 20 bits long.

C.       An IPv6 header contains the next header field.

D.      An IPv6 header contains the protocol field.

E.       IPv6 routers send RA messages.

F.        An IPv6 header contains the header checksum field.


Correct Answer: ACE


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