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56.
What is Beaconing?

The process that allows a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in Token ring and FDDI networks

57.
What is terminal emulation, in which layer it comes?

Telnet is also called as terminal emulation. It belongs to application layer

58.
What is frame relay, in which layer it comes?

Frame relay is a packet switching technology. It will operate in the data link layer

59.
What do you meant by "triple X" in Networks?

The function of PAD (Packet Assembler Disassembler) is described in a document known as X.3. The standard protocol has been defined between the terminal and the PAD, called X.28; another standard protocol exists between hte PAD and the network, called X.29. Together, these three recommendations are often called "triple X"

60.
What is SAP?

Series of interface points that allow other computers to communicate with the other layers of network protocol stack