Lantronix MPS100 EPS Reference Manual - Page 210
Internet Control Message Protocol. ICMP messages are sent by TCP/IP
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DHCP DHCP download Fast Ethernet flash ROM gateway hardware address host ICMP IP address Glossary Dynamic Host Control Protocol. DHCP allows nodes on the network to lease IP addresses from a DHCP server. If the node has been configured to query a DHCP server, the node will receive a temporary IP address each time it boots. When a node is no longer using the IP address, it goes back into the pool of available IP addresses for the next query. The transfer of a file or information from one network node to another. Generally it refers to transferring a file from a "big" node, such as a computer, to a "small" node, such as a terminal server or printer. Because the Server code is downloaded (as opposed to being stored permanently in the device's ROM), the code can be upgraded easily. High-speed Ethernet. See 100BASE-T. See ROM. A TCP/IP host that can access two or more different Ethernet networks. As such, it can forward messages across networks that other hosts would not be able to access. The host generally has multiple IP addresses, one for each network. For example, a gateway might "live" at addresses 192.0.1.8 and 193.0.1.8. Hosts wishing to forward messages may address the messages to the gateway which will then pass them on to the other network. For example, if an Server at address 192.0.1.33 wished to talk to a host at address 196.0.1.58, he would have to go through a gateway machine on his network. The gateway would forward messages between networks 192.0.1 and 196.0.1. See subnet mask. Every node has a hardware address that is unique across all networks. If you know a node's hardware address, you should be able to identify the exact piece of equipment that goes with it. Hardware addresses are generally set up by the company that manufactured the equipment and should never change. The hardware address is usually specified as a list of six hexadecimal numbers separated by dashes, such as "ae-34-2c-1d-69-f1." The hardware address for your Server is shown on a label on the rear of the unit. See network address. Generally a node on a network that can be used interactively, or logged into, usually an to interactive computer. In the Server command set, host is used to refer to a TCP/IP node, rather than TCP/IP and LAT nodes. Internet Control Message Protocol. ICMP messages are sent by TCP/IP nodes in response to errors in TCP/IP messages or queries from other nodes. They are sent, for example, when a node sends a packet to an incorrect gateway host, or when a network packet expires. ICMP messages may also be sent as broadcasts, not just sent to a specific host. The Server counters for ICMP messages may be helpful for detecting network problems. In the case of TCP/IP networks, each node has a software or IP address that is configurable by the managers of the nodes. The software address is usually specified as four decimal numbers separated by periods (for example, 197.49.155.247). In this case, each number must be between zero and 255, and each corresponds to a different network or sub-network. Depending on how Glossary-2
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