link layer
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... requirements for host system implementations of the Internet protocol
suite. This RFC covers the communication protocol layers: link
layer, IP layer, and transport layer. Its companion RFC,
...
... Link Layer ...
...
There is a wide variety of link layer protocols,
corresponding to the many different types of networks.
...
... protocols. Thus, the following three major sections specify
the requirements for the link layer, the internet layer, and
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... between the internet layer and the link layer. It
includes an IP header and data. A packet may be a
...
... A frame is the unit of transmission in a link layer
protocol, and consists of a link-layer header followed by
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... LINK LAYER ...
... gateways, have the same
requirements for link layer protocols. These requirements are
given in Chapter 3 of "Requirements ...
... Internet layer to the link layer to indicate a
delivery problem. The effect of this call would
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...
The link layer SHOULD save (rather than discard) at least
one (the latest) packet of each set of packets destined to
the same unresolved IP address ...
... The packet receive interface between the IP layer and the link
layer MUST include a flag to indicate whether the incoming packet
was addressed to a link-layer ...
...
Although the IP layer does not generally know link layer
addresses (since every different network medium typically has
a different address format ...
... LINK LAYER REQUIREMENTS SUMMARY ...
... on Ethernet and IEEE 802 nets |2.3.3 |x| | | | |
Link layer report b'casts to IP layer |2.4 |x| | | | |
IP layer pass ...
... |2.4 |x| | | | |
IP layer pass TOS to link layer |2.4 |x| | | | |
No ARP cache entry treated as Dest. Unreach. |2.4 | | | | |x|
...
... multicast address, simply
pass the datagram to the link layer for the appropriate
interface.
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... architecture, but it is expected to come primarily from
the transport and link layers. Here are some possible
sources for gateway advice:
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... link-layer
multiplexing, the protocols above the link layer are unaware
that multiple physical interfaces are present; the link ...
... LINK LAYER REFERENCES ...