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4 Cards in this Set
- Front
- Back
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Classless addressing
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Only two parts - host & subnet
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Classful addressing
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Three parts - host, subnet, network
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Router logic (4-steps)
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1. Use data-link FCS field to ensure no errors, if errors discard.
2. Discard the old data-link header/trailer leaving the IP packet. 3. Compare IP packet destination address to routing table & find route that matches destination address. 4. Encapsulate the IP packet inside a new data-link header/trailer, forward the frame. |
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ARP
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Given IP address - find MAC address. Request is broadcast to everyone on LAN. ARP is not used for IP addresses outside of local subnet, because default gateway is used.
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