![]() ![]() IPv6 addresses of all types are assigned to interfaces, not nodes.Īn IPv6 unicast address refers to a single interface. In IPv6, all zeros and all ones are legal values for any field, (e.g., "subnet prefix"), it refers to all of the address from the Identifier after the name (e.g., "subnet ID"), it refers to theĬontents of the named field. When this name is used with the term "ID" for In this document, fields in addresses are given a specific name, forĮxample, "subnet". There are no broadcast addresses in IPv6, their function being Multicast address is delivered to all interfaces Multicast: An identifier for a set of interfaces (typicallyīelonging to different nodes). To the routing protocols' measure of distance). Identified by that address (the "nearest" one, according A packet sent to anĪnycast address is delivered to one of the interfaces Unicast address is delivered to the interface identifiedĪnycast: An identifier for a set of interfaces (typicallyīelonging to different nodes). Unicast: An identifier for a single interface. Interfaces (where "interface" is as defined in Section 2 of ). IPv6 addresses are 128-bit identifiers for interfaces and sets of Types of IPv6 addresses (unicast, anycast, and multicast). It includes the basic formats for the various 18 Appendix A: Creating Modified EUI-64 Format Interface Identifiers. IPv6 Addresses with Embedded IPv4 Addresses. RFC 4291 IPv6 Addressing Architecture February 2006ġ. This document obsoletes RFC 3513, "IP Version 6 Addressing Unicast addresses, anycast addresses, and multicast addresses, and an Model, text representations of IPv6 addresses, definition of IPv6 The document includes the IPv6 addressing This specification defines the addressing architecture of the IP Distribution of this memo is unlimited.Ĭopyright (C) The Internet Society (2006). Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the That said.RFC 4291: IP Version 6 Addressing Architecture The loopback ones by the way) for whatever purpose you may add the "Microsoft Loopback Adapter" but it isn't the same thing as the virtual "lo" one used in *nix systems RX bytes:2802587448 (2.6 GiB) TX bytes:2802587448 (2.6 GiB)īecause in Windows, the virtual adapter used for the "loopback" address range is emulated straight inside the stack there's no need for a "lo" interface then, if you want/need a virtual adapter (to which you may then assign whatever IP settings - except TX packets:10956814 errors:0 dropped:0 overruns:0 carrier:0 RX packets:10956814 errors:0 dropped:0 overruns:0 frame:0 What I'm comparing with this with is many Linux distrobutions which have a lo or local adapter card that do this by default and wondering why MS doesn't do the same? for other purposesĪs for the why it isn't installed by default, the answer is simple, because not everyone may or will need it, and since installing it just requires a few seconds, people which knows about such a "virtual adapter" and needs it won't have any problem in installing With any real card such an adapter may be useful too in several cases, for example you may use it to offer to application needing a network connection an adapter to bind-to even if there's no real network connection available. #Standard loopback address driver#Machine" itself and can be used for local testing and similar purposes on the other hand, the "loopback adapter" is a device driver which can be installed as any other NIC driver, such a driver emulates a NIC (network card) but in reality it doesn't interface The first one is an address (range), that is 127.0.0.0 to 127.255.255.255 (although commonly people refers to 127.0.0.1) which is built straigh INTO the network stack such an address isn't bound to any real network adapter but just belongs to the "local #Standard loopback address install#Why does the MS loopback adapter not allow you to use 127.0.0.1 ? Also, why wouldn't MS Install that adapter by default?įirst of all, it sounds like you are confusing the "loopback address" (or better said - subnet since it's the whole 127/8 subnet) with the "loopback adapter" ![]()
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