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254849
IPv4 Routing
Description
CCENT 4.Fundamentals of IPv4 Addressing and Routing Mind Map on IPv4 Routing, created by jce299792458 on 05/10/2013.
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4.fundamentals of ipv4 addressing and routing
4.fundamentals of ipv4 addressing and routing
ccent
Mind Map by
jce299792458
, updated more than 1 year ago
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jce299792458
almost 11 years ago
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Resource summary
IPv4 Routing
Host Routing
Step 1. If the destination IP address is in the same IP subnet as I am, send the packet directly to that destination host.
Step 2. Otherwise, send the packet to my default gateway, also known as a default router.
Router Forwarding Logic
Step 1. Use the data link Frame Check Sequence (FCS) field to ensure that the frame had no errors; if errors occurred, discard the frame.
Step 2. Assuming that the frame was not discarded at Step 1, discard the old data link header and trailer, leaving the IP packet.
Step 3. Compare the IP packet’s destination IP address to the routing table, and find the route that best matches the destination address.
Step 4. Encapsulate the IP packet inside a new data link header and trailer, appropriate for the outgoing interface, and forward the frame.
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