This set of Computer Networks test focuses on “IPv6 Addressing”.
1. Dual-stack approach refers to
a) Implementing Ipv4 with 2 stacks
b) Implementing Ipv6 with 2 stacks
c) Node has both IPv4 and IPv6 support
d) None of the mentioned
Explanation: Dual-stack is one of the approach used to support IPv6 in already existing systems.
2. Suppose two IPv6 nodes want to interoperate using IPv6 datagrams but are connected to each other by intervening IPv4 routers. The best solution here is
a) Use dual-stack approach
c) No solution
d) Replace the system
Explanation: The IPv4 routers can form a tunnel.
3. Teredo is an automatic tunneling technique. In each client the obfuscated IPv4 address is represented by bits
a) 96 to 127
b) 0 to 63
c) 80 to 95
d) 64 to 79
Explanation: Bits 96 to 127 in the datagram represents obfuscated 1Pv4 address.
4. A link local address of local addresses is used in an
a) Isolated router
b) Isolated mask
c) Isolated subnet
d) Isolated net
Explanation: Isolated subnet is very huge sharing network area in this link local address of local addresses is used.
5. In subcategories of reserved address in IPv6, address that is used by a host to test itself without going into network is called
a) Unspecified address
b) Loopback address
c) Compatible address
d) Mapped 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.
6. A few leftmost bits in each address of IPv6 address define its category is called
a) Prefix type
b) Postfix type
c) Reserved type
d) Local type
Explanation: Prefix means bits in the IP address are placed in leftmost position.
7. In IPv6 addresses, addresses start with eight 0s are called
a) Unicast addresses
b) Multicast addresses
c) Any cast addresses
d) Reserved addresses
Explanation: In IPv6 address format the starting bits are specified with eight 0s called reserved address.
8. Which statement(s) about IPv6 addresses are true?
a) Leading zeros are required
b) Two colons (::) are used to represent successive hexadecimal fields of zeros
c) Two colons (::) are used to separate fields
d) A single interface cannot have multiple IPv6 addresses of different types
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.
9. When IPV6 launched
a) June 2, 2012
b) June 4, 2012
c) June 5, 2012
d) June 6, 2012
Sanfoundry Global Education & Learning Series – Computer Networks.
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