Topic 4: problem sheet
.Q5.The LLC is sometimes described as providing a multiplexed service to upper layer protocols.
Describe what this statement means and try to give an example of this in action.
[ 2 marks ]
Q7. Describe why routers require at least 2 network cards.
Q19. Describe when entries are added and removed from the ARP cache.
Q20. As a Data Link frame moves through an internetwork the Ethernet frame header is modified at each step.
Describe why this must happen at each router.
Topic 6: problem sheet
Q 5. How many bits are used in a UDP header to store the destination port number?
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