| 11. | The interface between the Application Entity and the Data Link Layer is called A-interface.
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| 12. | Brouters operate at both the protocols and at the data link layer for non-routable protocols.
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| 13. | Some taps operate at the physical layer of the OSI model rather than the data link layer.
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| 14. | PPP is commonly used as a data link layer protocol for connection over NBF, DECnet and AppleTalk.
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| 15. | The underlying Data Link Layer almost always poses limits to the maximum frame size ( See MTU ).
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| 16. | The gateway also operates at the data link layer ( Layer 2 ) of the OSI network model.
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| 17. | Some approaches utilize both the Network and Data link layer but do not consider the cross layer behaviors.
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| 18. | The interface between the Data Link Layer and the physical layer is called Medium Independent Interface ( MII ).
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| 19. | To alleviate these problems, bridging was created to communicate at the data link layer while isolating the physical layer.
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| 20. | Allowing direct data link layer communication between customer nodes exposes the network to various security attacks, such as ARP spoofing.
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