ITPEC IP April 2025 Question 32
Which of the following is an appropriate example of an IPv4 IP address that is assigned to a PC?
Explanation
10.123.45.67 — four decimal numbers from 0 to 255 separated by dots, the form of an IPv4 address.
An IPv4 address is 32 bits, written as four 8-bit parts in decimal (dotted decimal notation), each 0–255. All four parts of 10. are in range. It also falls in 10.–10., a private address range, so it is the kind of address a PC on a company or home LAN is given.
Answer (c)
Why not others:
- •(a) — six two-digit hexadecimal groups, 48 bits, the form of a MAC address, which identifies a network card rather than a host on the Internet
- •(b) — the form of a telephone number
- •(d) — a URL, naming the protocol and the host by domain name; DNS turns the name into an IP address
Key rule: IPv4 is 32 bits in four decimal parts, IPv6 is 128 bits in eight hexadecimal groups, and a MAC address is 48 bits in six hexadecimal pairs.
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