]> All IPv4 addresses and subnet masks are represented as strings in IPv4 dotted-decimal notation. All IPv6 addresses MUST be represented using any of the 3 standard textual representations as defined in {{bibref|RFC3513}} Sections 2.2.1, 2.2.2 and 2.2.3. Both lower-case and upper-case letters can be used. Use of the lower-case letters is RECOMMENDED. Examples of valid IPv6 address textual representations: * 1080:0:0:800:ba98:3210:11aa:12dd * 1080::800:ba98:3210:11aa:12dd * 0:0:0:0:0:0:13.1.68.3 Unspecified or inapplicable IP addresses and subnet masks MUST be represented as empty strings unless otherwise specified by the parameter definition. IPv4 addresses and subnet masks are represented as strings in IPv4 dotted-decimal notation. Unspecified or inapplicable IP addresses and subnet masks MUST be represented as empty strings unless otherwise specified by the parameter definition. IPv4 or IPv6 routing prefix in Classless Inter-Domain Routing (CIDR) notation {{bibref|RFC4632}}. This is specified as an IP address followed by an appended "/n" suffix, where ''n'' (the prefix size) is an integer in the range 0-32 (for IPv4) or 0-128 (for IPv6) that indicates the number of (leftmost) '1' bits of the routing prefix. IPv4 example: 192.168.1.0/24 IPv6 example: 2001:edff:fe6a:f76::/64 Unspecified or inapplicable IP prefixes MUST be represented as empty strings unless otherwise specified by the parameter definition. All MAC addresses are represented as strings of 12 hexadecimal digits (digits 0-9, letters A-F or a-f) displayed as six pairs of digits separated by colons. Unspecified or inapplicable MAC addresses MUST be represented as empty strings unless otherwise specified by the parameter definition.