Solution

The correct answer is 2)(A), (B), (D) and (E) Only

EXPLANATION:

• (A) In IPv4 addressing, a block of address can be defined as x.y.z.t / n in which x.y.z.t defines one of the addresses and / n defines the mask. -
  • This statement is CORRECT. In IPv4, the notation x.y.z.t/n is used to represent an IP address and its associated subnet mask, where n indicates the number of bits used for the network prefix.
• (B) The first address in the block can be found by setting the rightmost 32-n bits to 0s. -
  • This statement is CORRECT. To find the network address (first address in the block), you set the host bits (rightmost 32-n bits) to 0s.
• (C) Address of class C is used for multicast communication. -
  • This statement is NOT CORRECT. Class C addresses are used for small-sized networks and not for multicast communication. Multicast addresses are actually in the range of Class D (224.0.0.0 to 239.255.255.255).
• (D) There are five classes in IPv4 address. -
  • This statement is CORRECT. IPv4 addresses are divided into five classes: A, B, C, D, and E.
• (E) Supernetting combines several networks into one large network. -
  • This statement is CORRECT. Supernetting, or Classless Inter-Domain Routing (CIDR), allows for combining multiple networks into a single larger network, which helps in reducing the number of routing table entries.