Though weak, this paragraph is not a total washout. It starts with a topic sentence, and the sentences that follow are clearly related to the topic sentence. In the language of writing, the paragraph is unified (i.e., it contains no irrelevant details). However, the paragraph is not coherent. The sentences are disconnected from each other, making it difficult for the reader to follow the writer's train of thought. Below is the same paragraph revised for coherence.
A URL technically has five parts: the protocol, the domain name, the path, the directory and the file name. Consider the URL http://coolexample.com/funky/music.html. The protocol is http://, the domain name is coolexample.com, the path is /funky/music.html, the directory is /funky/ and the file name is /music.html.
Parts of a URL. The first part of the URL is called a protocol identifier and it indicates what protocol to use, and the second part is called a resource name and it specifies the IP address or the domain name where the resource is located. The protocol identifier and the resource name are separated by a colon and two forward slashes.