Ipv6(Networking ) Questions and answers for exam Preparation

Question 1. Which of the following is true when describing a multicast address?

Packets addressed to a unicast address are delivered to a single interface.
Packets are delivered to all interfaces identified by the address. This is also called a one-to-many address.
Identifies multiple interfaces and is only delivered to one address. This address can also be called one-to-one-of-many.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

Explanation:-

Answer: Option B. -> Packets are delivered to all interfaces identified by the address. This is also called a one-to-many address.
Packets addressed to a multicast address are delivered to all interfaces identified by the multicast address, the same as in IPv4. It is also called a one-to-many address. You can always tell a multicast address in IPv6 because multicast addresses always start with FF.

Question 2. What multicast addresses does RIPng use?

FF02::A
FF02::9
FF02::5
FF02::6

Explanation:-

Answer: Option B. -> FF02::9
RIPng uses the multicast IPv6 address of FF02::9. If you remember the multicast addresses for IPv4, the numbers at the end of each IPv6 address are the same.

Question 3. To enable OSPFv3, which of the following would you use?

Router1(config-if)# ipv6 ospf 10 area 0.0.0.0
Router1(config-if)# ipv6 router rip 1
Router1(config)# ipv6 router eigrp 10
Router1(config-rtr)# no shutdown

Explanation:-

Answer: Option A. -> Router1(config-if)# ipv6 ospf 10 area 0.0.0.0
To enable OSPFv3, you enable the protocol as with RIPng. The command string is ipv6 ospf area .

Question 4. Which of the following is true when describing a unicast address?

Packets addressed to a unicast address are delivered to a single interface.
These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
These are like private addresses in IPv4 in that they are not meant to be routed.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

Explanation:-

Answer: Option A. -> Packets addressed to a unicast address are delivered to a single interface.
Packets addressed to a unicast address are delivered to a single interface. For load balancing, multiple interfaces can use the same address.

Question 5. Which statement(s) about IPv6 addresses are true?
1. Leading zeros are required.
2. Two colons (::) are used to represent successive hexadecimal fields of zeros.
3. Two colons (::) are used to separate fields.
4. A single interface will have multiple IPv6 addresses of different types.

1 and 3
2 and 4
1, 3 and 4
All of the above

Explanation:-

Answer: Option B. -> 2 and 4
In order to shorten the written length of an IPv6 address, successive fields of zeros may be replaced by double colons. In trying to shorten the address further, leading zeros may also be removed. Just as with IPv4, a single device's interface can have more than one address; with IPv6 there are more types of addresses and the same rule applies. There can be link-local, global unicast, and multicast addresses all assigned to the same interface.

Question 6. You want to ping the loopback address of your local host(with IPv6). What will you type?

ping 127.0.0.1
ping 0.0.0.0
ping ::1
trace 0.0.::1

Explanation:-

Answer: Option C. -> ping ::1
The loopback address with IPv4 is 127.0.0.1. With IPv6, that address is ::1.

Question 7. Which of the following is true when describing an anycast address?

Packets addressed to a unicast address are delivered to a single interface.
Packets are delivered to all interfaces identified by the address. This is also called one-to-many addresses.
This address identifies multiple interfaces and the anycast packet is only delivered to one address. This address can also be called one-to-one-of-many.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

Explanation:-

Answer: Option C. -> This address identifies multiple interfaces and the anycast packet is only delivered to one address. This address can also be called one-to-one-of-many.
Anycast addresses identify multiple interfaces, which is the same as multicast; however, the big difference is that the anycast packet is only delivered to one address, the first one it finds defined in the terms of routing distance. This address can also be called one-to-one-of-many.

Question 8. Which statement(s) about IPv4 and IPv6 addresses are true?
1. An IPv6 address is 32 bits long, represented in hexidecimal.
2. An IPv6 address is 128 bits long, represented in decimal.
3. An IPv4 address is 32 bits long, represented in decimal.
4. An IPv6 address is 128 bits long, represented in hexidecimal.

1 and 3 only
2 only
3 and 4
2 and 4

Explanation:-

Answer: Option C. -> 3 and 4
IPv4 addresses are 32 bits long and are represented in decimal format. IPv6 addresses are 128 bits long and represented in hexadecimal format.

Question 9. Which of the following is true when describing a unique local address?

Packets addressed to a unicast address are delivered to a single interface.
These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
These are like private addresses in IPv4 in that they are not meant to be routed.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

Explanation:-

Answer: Option D. -> These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.
These addresses are meant for nonrouting purposes like link-local, but they are almost globally unique so it is unlikely they will have an address overlap. Unique local addresses were designed as a replacement for site-local addresses.

Question 10. Which of the following is true when describing a link-local address?

Packets addressed to a unicast address are delivered to a single interface.
These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
These are like private addresses in IPv4 in that they are not meant to be routed.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

Explanation:-

Answer: Option C. -> These are like private addresses in IPv4 in that they are not meant to be routed.
Link-local addresses are meant for throwing together a temporary LAN for meetings or a small LAN that is not going to be routed but needs to share and access files and services locally.