R
- reference model
- A logical framework that keeps a logical and necessary sequence of events in its proper order.
- reliable delivery
- The Transmission Control Protocol (TCP) guarantees that packets of data are delivered and can be put back into their original sequence after delivery. This is known as reliable delivery.
- Round Trip Time
- One of the many things that TCP/IP does for you automatically when you start a communications session with it is to keep track of the amount of time it takes to send a packet to a remote destination and to receive a response. That amount of time is known as Round Trip Time (RTT).
- router
- A specialized device that is designed to push IP packets (or other protocols' packets) through a network.
- routing protocol
- A software program designed specifically to continuously seek out IP network addresses that might be accessible indirectly through a network connection and assess the reachability of that destination. The protocol then compares different routes through a network to reach the same destination and selects the best one.
- routing table
- A listing of best paths to known destination networks. That list is correlated with the router's interface that must be used to get to that path. A routing table can also include routes to individual IP addresses but must be specifically programmed to do so. In normal operation, they track routes to IP network addresses.
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