File Transfer Protocol (FTP) is a client-server standard used to transfer files between computers over the Internet using control and data channels.
Generic Routing Encapsulation (GRE) is a simple protocol that encapsulates packets in order to route other protocols over IP networks, as defined by RFC 2784.
ISDN (Integrated Services Digital Network) is a set of CCITT/ITU standards for digital transmission over ordinary telephone copper wire, as well as over other media.
Definition: Learn what MPLS (Multiprotocol Label Switching) is and why allowing packets to be forwarded at the Layer 2 (switching) level rather than at the Layer 3 (routing) level is important for Quality of Service (QoS).
The OSPF router protocol is used to find the best path for packets as they pass through a set of connected networks. OSPF is one of several Interior Gateway Protocols that replaces the Routing Information Protocol (RIP), an older routing protocol that is installed in many of today's corporate networks.