The Railroad Retirement Board will collect your Medicare premiums (if you have them) and premiums. If you receive railroad retirement benefits or railroad disability annuity checks, your Medicare premiums will be automatically deducted from your check each month.
The link is the physical and logical network component used to interconnect hosts or nodes in the network and a link protocol is a suite of methods and standards that operate only between adjacent network nodes of a local area network segment or a wide area network connection.
This example is tree-like but many networks have loops. A telecommunications network is a collection of terminal nodes, links are connected so as to enable telecommunication between the terminals. The transmission links connect the nodes together.