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A forwarding information base (FIB), also known as a forwarding table or MAC table, is most commonly used in network bridging, routing, and similar functions to find the proper output network interface controller to which the input interface should forward a packet. It is a dynamic table that maps MAC addresses to ports.
A broadcast address is a network address used to transmit to all devices connected to a multiple-access communications network. A message sent to a broadcast address may be received by all network-attached hosts. In contrast, a multicast address is used to address a specific group of devices, and a unicast address is used to address a single ...
The IEEE 802 MAC address originally comes from the Xerox Network Systems Ethernet addressing scheme. [1] This 48-bit address space contains potentially 2 48 (over 281 trillion) possible MAC addresses. The IEEE manages the allocation of MAC addresses, originally known as MAC-48 and now called EUI-48 identifiers. The IEEE has a target lifetime of ...
This address is used by only one physical router at a time, and it will reply with this MAC address when an ARP request is sent for the virtual router's IP address. Physical routers within the virtual router must communicate within themselves using packets with multicast IP address 224.0.0.18 and IP protocol number 112 [1] for IPv4, or ff02::12 ...
Network mapping discovers the devices on the network and their connectivity. It is not to be confused with network discovery or network enumeration which discovers devices on the network and their characteristics such as operating system, open ports, listening network services, etc. The field of automated network mapping has taken on greater ...
The Address Resolution Protocol (ARP) is a communication protocol for discovering the link layer address, such as a MAC address, associated with a internet layer address, typically an IPv4 address. The protocol, part of the Internet protocol suite , was defined in 1982 by RFC 826 , which is Internet Standard STD 37.
An enterprise local area network (LAN) that connects to the corporate network by only one router, or multiple default routers connected to the same logical upstream destination. A single LAN which never carries packets between multiple routers connected to it. All traffic is to and/or from local hosts. The routers will only route packets into ...
The local network addresses used in IEEE 802 networks and FDDI networks are called MAC addresses; they are based on the addressing scheme that was used in early Ethernet implementations. A MAC address is intended as a unique serial number. MAC addresses are typically assigned to network interface hardware at the time of manufacture.