A network design engineer has been asked to design the IP addressing scheme for a customer network. The network will use IP addresses from the 192.168.30.0/24 network. The engineer allocates 254 IP addresses for the hosts on the network but excludes 192.168.30.0/24 and 192.168.30.255/24 IP addresses. Why must the engineer exclude these two IP addresses?

Last Updated on March 24, 2021 by Admin

A network design engineer has been asked to design the IP addressing scheme for a customer network. The network will use IP addresses from the 192.168.30.0/24 network. The engineer allocates 254 IP addresses for the hosts on the network but excludes 192.168.30.0/24 and 192.168.30.255/24 IP addresses. Why must the engineer exclude these two IP addresses?

  • 192.168.30.0/24 and 192.168.30.255/24 IP addresses are reserved for the email and DNS servers.
  • 192.168.30.0/24 and 192.168.30.255/24 IP addresses are reserved for outside Internet connectivity.
  • 192.168.30.0/24 is the network IP address and 192.168.30.255/24 is the IP broadcast address.
  • 192.168.30.0/24 is the IP address reserved for the default gateway, and 192.168.30.255/24 is the IP address reserved for the DHCP server.
    Answers Explanation & Hints:

    The IPv4 addressing system is a hierarchical addressing system. An IPv4 address is made up of two parts, the network address and the host address. When the host portion is all “0s” in binary, it is designated as a network address. When the host portion is all “1s” in binary, it is designated as a broadcast address. These two addresses cannot be assigned to individual hosts.

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