Test — Test 1

Correct Answer: C. C. Node has both ipv4 and ipv6 support
Explanation: Dual-stack is one of the approaches used to support IPv6 in already existing systems. ISPs are using it as a method to transfer from IPv4 to IPv6 completely eventually due to the lower number of possible available addresses in IPv4.

Correct Answer: B. B. Tunneling
Explanation: The IPv4 routers can form a tunnel in which at the sender’s side, the IPv6 datagram is encapsulated in to IPv4, and at the receiver’s side of the tunnel, the IPv4 packet is stripped and the IPv6 packet is sent to the receiver.

Correct Answer: A. A. 96 to 127
Explanation: Teredo is a technique through which gives the possibility for full IPv6 network connectivity to IPv6 capable hosts which are currently on an IPv4 network. Bits 96 to 127 in the datagram represents obfuscated 1Pv4 address of the IPv4 network.

Correct Answer: C. C. Isolated subnet
Explanation: Isolated subnet is very huge sharing network area in this link local address of local addresses is used. A link local address can be configured on any subnet with the prefix “FE80::”.

Correct Answer: B. B. Loopback address
Explanation: In subcategories of reserved address in IPv6, address that is used by a host to test itself without going into network is called loop back address. IPv6 loopback address is 0000:0000:0000:0000:0000:0000:0000:0001. IPv4 loopback address is 127.0.0.1. It’s a reserved address.

Correct Answer: A. A. Prefix type
Explanation: Prefix is the bits in the IP address which are placed in leftmost position. A network prefix in IPv6 is given by a CIDR format-liked number at the end of the address.

Correct Answer: D. D. Reserved addresses
Explanation: In IPv6 address format, the starting bits are specified with eight 0s to represent reserved addresses. These reserved addresses have a certain function pre-defined like the loop-back address is used to test a network card. Reserved addresses cannot be allotted to a machine.

Correct Answer: B. B. Two colons (::) are used to represent successive hexadecimal fields of zeros
Explanation: 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.

Correct Answer: A. A. June 6, 2012
Explanation: IPv6 was officially and permanently launched on June 6, 2012, in an event known as "World IPv6 Launch," organized by the Internet Society. On this day, major Internet Service Providers (ISPs), hardware manufacturers, and web companies worldwide enabled IPv6 for their products and services to address the exhaustion of IPv4 addresses.