are they true or false and why?

These statements can be either true or false The concept of a "port" in the TCP protocol is part of the IP protocol. A web server should always send back exactly the same syntactic representation of a resource for a given URL. In the first document, the terms "Programming and "Java' both occur 5 times. The tf.df score still assigns a higher value to the term "Java' If "Programming' occurs more frequently in the other indexed documents. Cookies can be used to pass on private and sensitive information. The goal of A/B testing is to analyze the difference in behaviour on a web page for two different user groups (for example male/female users) A web site owner hypothesizes that more than 80 percent of his visitors click the first link on his page and analyzes user logs to test this. This is a typical example of a explorative study In the above scenario, the independent variable is the link clicked, the dependent variable is the number of visitors. Scale-free networks (such as the Web) have nodes with on average many more in-links than out-links. The RDF data model uses two-valued tuples to link text strings into graphs (for example: "Victor"- "Teaches AtVU). Focus nds)