What binary value indicates IP version 4 in the IP header's 'Version' field?

The binary value that indicates IP version 4 in the IP header's 'Version' field is 0100. This value corresponds to the decimal number 4, which represents Internet Protocol version 4 (IPv4). In the IP header, the 'Version' field is a 4-bit field, and each version of the Internet Protocol has a specific binary representation.

In the context of the other choices, each option represents a different version or a non-standard version of the IP protocol. For example, 0110 would indicate version 6 (which is IPv6), while 1000 and 0001 do not correspond to defined IP versions; rather, they are arbitrary binary values without relevance to the Internet Protocol standards. Understanding the significance of these binary values is important for anyone working with networking concepts, as they highlight how protocols are identified and distinguished within network communications.