Definition
Search Engine
A software system that indexes and retrieves information from a database or the internet based on user queries.
Search engines use algorithms to rank and display the most relevant results.
Surface Web and Deep Web
The surface web and the deep web are two distinct parts of the internet:
- The surface web refers to the portion of the internet that is indexed by search engines like Google, Bing, or Yahoo.
- The deep web encompasses all web content that is not indexed by search engines.
Key Differences Between the Surface Web and the Deep Web
| Feature | Surface Web | Deep Web |
|---|---|---|
| Accessibility | Publicly accessible without restrictions | Requires authentication or specific permissions |
| Indexing | Indexed by search engines | Not indexed by search engines |
| Content Type | Static web pages, blogs, news articles | Dynamic content, databases, private information |
| Security | Generally less secure | Often protected by passwords or encryption |
Why the Deep Web Exists
The deep web exists for several reasons:
- Privacy: Sensitive information like medical records or financial data should not be publicly accessible.
