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Network interface cards are usually programmed to listen for three types of messages. They are messages sent to their specific address, messages broadcast to all NICs, and messages that qualify as a multicast for the specific card. There are three types of addressing: 1. Unicast – A transmission to a single interface card. 2. Multicast […]
NFS, defined by RFC 1094, is a method for client systems to use a file system on a remote host computer. NFS uses the UDP protocol and is supported by RPC. Remote Procedure Call (RPC) RPC, defined by RFC 1057, is a set of function calls used by a client program to call functions in […]
This protocol is used to assign IP addresses to hosts or workstations on the network. Usually a DHCP server on the network performs this function. Basically it “leases” out address for specific times to the various hosts. If a host does not use a given address for some period of time, that IP address can […]
If you’ve understood most of this document so far, the principles of Virtual private networking (VPN) will be easy to understand. The most confusing part of VPN is that many acronyms show up. This is partly because VPN requires data encryption to be “private” and there are many encryption techniques and terms. Also there are […]
Host Names Domain Name Service (DNS) is the service used to convert human readable names of hosts to IP addresses. Host names are not case sensitive and can contain alphabetic or numeric letters or the hyphen. Avoid the underscore. A fully qualified domain name (FQDN) consists of the host name plus domain name as in […]