In order for Wake-on-LAN to work, parts of the network interface need to stay on. Wake-on-LAN can, however, operate across any network in practice, given appropriate configuration and hardware, including remote wake-up across the Internet. Because Wake-on-LAN is built upon broadcast messaging, it can generally only be used within a subnet. The magic packet is sent on the data link layer (layer 2 in the OSI model) and when sent, is broadcast to all attached devices on a given network, using the network broadcast address the IP address (which relates to the internet layer) is not used. This has the same effect as pressing the power button. If a magic packet arrives and is addressed to the device's MAC address, the NIC signals the computer's power supply or motherboard to awaken. In computers capable of Wake-on-LAN, the NIC(s) listen to incoming packets, even when the rest of the system is powered down. This is an identifying number, built into each network interface controller (NIC), that enables the NIC to be uniquely recognized and addressed on a network. The magic packet contains the MAC address of the destination computer. WoL is implemented using a specially designed frame called a magic packet, which is sent to all computers in a network, among them the computer to be awakened. Principle of operation Įthernet connections, including home and work networks, wireless data networks, and the Internet itself, are based on frames sent between computers. In April 1997, this alliance introduced the Wake-on-LAN technology. In October 1996, Intel and IBM formed the Advanced Manageability Alliance (AMA). The WoL and WoWLAN standards are often supplemented by vendors to provide protocol-transparent on-demand services, for example in the Apple Bonjour wake-on-demand ( Sleep Proxy) feature. It is also possible to initiate the message from another network by using subnet directed broadcasts or a WoL gateway service. The message is usually sent to the target computer by a program executed on a device connected to the same local area network. If the computer being awakened is communicating via Wi-Fi, a supplementary standard called Wake on Wireless LAN (WoWLAN) must be employed. Wake-on-LAN ( WoL or WOL) is an Ethernet or Token Ring computer networking standard that allows a computer to be turned on or awakened from sleep mode by a network message.Įquivalent terms include wake on WAN, remote wake-up, power on by LAN, power up by LAN, resume by LAN, resume on LAN and wake up on LAN. Songs from the Apple Music catalog cannot be burned to a CD.Mechanism to wake up computers via a network A physical Wake-on-LAN connector (white object in foreground) featured on the IBM PCI Token-Ring Adapter 2
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |