| 11. | The user speaks and a microphone built into the LINK control console picks up the voice.
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| 12. | Optional headers may contain further link control information.
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| 13. | Link control characters start with odd parity, followed by a one bit, followed by two bits.
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| 14. | Link Control Protocol ( LCP ) initiates and terminates connections gracefully, allowing hosts to negotiate connection options.
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| 15. | It provides multiplexing, data fragmentation, error checking, link control, prioritization, and layer 2 addressing services for user data.
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| 16. | This de facto standard has been adopted by ISO as High-Level Data Link Control ( HDLC ) in 1979
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| 17. | However, IP can run over a reliable data link protocol such as the High-Level Data Link Control ( HDLC ).
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| 18. | Service access points are also used in IEEE 802.2 Logical Link Control in Ethernet and similar Data Link Layer protocols.
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| 19. | The MAC sublayer acts as an interface between the logical link control ( LLC ) sublayer and the network's physical layer.
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| 20. | Sixteen are used to send four ( 4 ) bits, two are unused, and two are used to construct link control characters.
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