RFC 2131, "Dynamic Host Configuration Protocol", March 1997

Errata ID: 5100
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Fan Wei
Date Reported: 2017-08-29

Section 4.1 says:

Normally, DHCP servers and BOOTP relay agents attempt to deliver
DHCPOFFER, DHCPACK and DHCPNAK messages directly to the client using
uicast delivery.

It should say:

Normally, DHCP servers and BOOTP relay agents attempt to deliver
DHCPOFFER, DHCPACK messages directly to the client using
unicast delivery.

Notes:

According to prior part description in section 4.1: "In all cases, when ’giaddr’ is zero, the server broadcasts any DHCPNAK messages to 0xffffffff.", the DHCP server should not send DHCPNAK in unicast to client unless 'giaddr' is not zero.

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