642-902 Q&A – Implement an IPv6 based solution (31-35)

Section 4 – Implement an IPv6 based solution, given a network design and a set of requirements

QUESTION NO: 31
What are two rules for compacting IPv6 addresses? (Choose two.) Select 2 response(s).
A. The maximum number of times a double colon can replace a 16-bit segment that consists of all zeroes is two.
B. The leading zeroes in any 16-bit segment do not have to be written.
C. Every 16-bit segment that consists of all zeroes can be represented with a single colon.
D. The trailing zeroes in any 16-bit segment do not have to be written.
E. Any single, continuous string of one or more 16-bit segments that consists of all zeroes can be represented with a double colon.
F. Two zeroes in the middle of any 16-bit segment do not have to be written.
Answer: BE

QUESTION NO: 32
When an IPv6 enabled host boots, it sends a router solicitation (RS) message. An IPv6 router responds with a router advertisement (RA). Which two items are contained in the RA? (Choose two.)
Select 2 response(s).
A. IPv6 address for the host
B. lifetime of the prefix
C. prefixes for the link
D. keepalive timers
E. request for the local host IP address
F. any route advertisements it has received
Answer: BC
Explanation:
In IP Version 6, Router Advertisements have the following attributes:
Routers advertise periodically
– Max. time between advertisements can be in the range from 4 and
1800 seconds
– The advertisement has a lifetime (= 0 if not a default router) Advertisement contains one or more prefixes
– Prefixes have a lifetime
Preferred lifetime
Valid lifetime
Specifies if stateful or stateless autoconfiguration is to be Used Plays a key role in site renumbering

QUESTION NO: 33
Which statement is true about IPv6? Select the best response.
A. Only one IPv6 address is assigned per node.
B. Only one IPv6 address can be assigned to each interface.
C. Each host can autoconfigure its address without the aid of a DHCP server.
D. IPv6 hosts use anycast addresses to assign IP addresses to interfaces.
Answer: C

QUESTION NO: 34
Which statement describes the difference between a manually configured IPv6 in IPv4 tunnel versus an automatic 6to4 tunnel?
A. A manually configured IPv6 in IPv4 tunnel allows multiple IPv4 destinations. B. An automatic 6to4 tunnel allows multiple IPv4 destinations.
C. A manually configured IPv6 in IPv4 tunnel does not require dual-stack (IPv4 and IPv6) routers at the tunnel endpoints.
D. An automatic 6to4 tunnel does not require dual-stack (IPv4 and IPv6) routers at the tunnel endpoints.
Answer: B

QUESTION NO: 35
What is IPv6 router solicitation?
A. a request made by a node to join a specified multicast group
B. a request made by a node for its IP address
C. a request made by a node for the IP address of the DHCP server
D. a request made by a node for the IP address of the local router
Answer: D

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