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Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255 1 048 576: Private network Used for local communications within a private network [3] 192.0.0.0/24 192.0.0.0–192.0.0.255 256
Computers can maintain lists of known addresses, rather than using an active protocol. In this model, each computer maintains a database of the mapping of Layer 3 addresses (e.g., IP addresses) to Layer 2 addresses (e.g., Ethernet MAC addresses). This data is maintained primarily by interpreting ARP packets from the local network link.
A single-octet node address is unique only to an individual network. Ethernet I (DIX v1.0) 1980-09 [b] 10 Mbit/s (1.25 MB/s) over thick coax. Frames have a Type field. This frame format is used on all forms of Ethernet by protocols in the Internet protocol suite. Six-octet MAC address. Ethernet II (DIX v2.0) 1982-11 [b] 802.3-1985 1983-06
Designed to provide rapid network redundancy, on top of spanning tree protocol. [3] Each node is connected twice to a single LAN through the dual network interface controllers . The driver and the FTE enabled components allow network communication to occur over an alternate path when the primary path fails.
The data link layer addresses data packets based on the destination hardware's physical Media Access Control (MAC) address. Switches within the network maintain Content Address Tables (CAMs) that maps the switch's ports to specific MAC addresses. These tables allow the switch to securely deliver the packet to its intended physical address only.
Locus Address Resolution Protocol: 0x5C 92 MTP Multicast Transport Protocol: 0x5D 93 AX.25 AX.25: 0x5E 94 OS KA9Q NOS compatible IP over IP tunneling: 0x5F 95 MICP Mobile Internetworking Control Protocol: 0x60 96 SCC-SP Semaphore Communications Sec. Pro 0x61 97 ETHERIP Ethernet-within-IP Encapsulation RFC 3378: 0x62 98 ENCAP Encapsulation ...
For IPv4, no black hole address is explicitly defined, however the reserved IP addresses can help achieve a similar effect. For example, 198.51.100.0 / 24 is reserved for use in documentation and examples [ 2 ] ; while the RFC advises that the addresses in this range are not routed, this is not a requirement.
Public IP addresses may be used for communication between hosts on the global Internet. In a home situation, a public IP address is the IP address assigned to the home's network by the ISP. In this case, it is also locally visible by logging into the router configuration. [31] Most public IP addresses change, and relatively often.