blog entry ip address and protocol

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Pick up key topics from the lecture or chapters under review and create a blog entry.  Each blog entry should be at least two paragraphs.  In the first paragraph, paraphrase what you have learned from reading an article, visiting a website or viewing a video.  Please provide a link or a reference to the article, website or video.  In the second paragraph, express your thoughts on what you have read.  You can either further explain or criticize what you have read.

The topic is : IP address and protocol. (see attachment)