Networking software and hardware arranged in layers

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1) Why is networking software and hardware arranged in layers?

2) Why do internet routers forward packets using prefix based address(ex. 172.217/16, rather than say, specific entries for 172.217.7.14 and 172.217.9.238) in the forwarding table?

3) What is the primary benefit of public key cryptography over symmetric key cryptography? What is the primary disadvantage?

4) What is the purpose of client-side buffering on your Netflix video client?

5) A gratuitous ARP reply happens when a host sends out an ARP reply packets with its IP and MAC address in the destination fields to a second host which did not make an ARP request to the former. Give one reason why gratuitous ARP's are useful.

Reference no: EM132322846

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