TCP/IP Tutorial

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Q&A

Q1:

What is the difference between a protocol standard and a protocol implementation?

A1:

A protocol standard is a system of rules. A protocol implementation is a software component that applies those rules in order to provide networking capability to a computer.

Q2:

Why did the designers of ARPAnet want a decentralized network?

A2:

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.

Q3:

Why was end-node verification an important feature of ARPAnet?

A3:

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.

Q4:

Why do larger networks employ name resolution?

A4:

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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