Q&A
| Q. | What is the difference between a protocol standard and a protocol implementation? |
| A. | A protocol standard is a system of rules. A protocol implementation is a software component that applies those rules to provide networking capability to a computer. |
| Q. | Why did the designers of ARPAnet want a decentralized network? |
| A. | They envisioned a network that would be used for military purposes, and they didn’t want to concentrate critical services in a central location that could become the focus of an attack. |
| Q. | Why was end-node verification an important feature of ARPAnet? |
| A. | By design, the network was not supposed to be controlled from any central point. The sending and receiving computers, therefore, had to take charge of verifying their own communication. |
| Q. | Why do larger networks employ name resolution? |
| A. | IP addresses are difficult to remember and easy to get wrong. DNS-style domain names are easier to remember because they let you associate a word or name with the IP address. |
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