CCNA Semester 1 Chapter 6
Terms
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- The data link layer of the OSI model provides access to
- the networking media and physical transmission across the media, which enables the data to locate its intended destination on a network.
- The data link layer is concerned with physical (as opposed to network, or logical)...
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addressing
network topology
line discipline (how end systems will use the network link)
error notification
ordered delivery of frames
flow control. -
Layer 1 limmitation:
Layer 1 cannot communicate with the upper level layers
Layer 2 solution: - Layer 2 Logical Link Control (LLC).
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Layer 1 limmitation:
Layer 1 cannot name or identify computers
Layer 2 solution: - Layer 2 uses the addressing (or naming) process to identify computers
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Layer 1 limmitation:
Layer 1 can only describe streams of bits
Layer 2 solution: - Layer 2 uses framing to organize or group the bits
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Layer 1 limmitation:
Layer 1 cannot decide which computer will transmit binary data from a group that are all trying to transmit at the same time
Layer 2 solution: - Media Access Control (MAC) address
- IEEE 802.3 specifies...
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Layer 1: the physical layer
Layer 2: the channel-access portion of the data link layer - IEEE divides the data link layer two parts:
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>The technology-independent 802.2 LLC standard
>The specific, technology-dependent parts that incorporate Layer 1 connectivity
>>Media Access Control (MAC) (transitions down to media)
>>Logical Link Control (LLC) (transitions up to the network layer) - LLC stands for
- Logical Link Control (LLC)
- MAC stands for:
- Media Access Control (MAC)