# Default Account Credentials ``` username: neo4j password: neo4j ``` # Neo4j **Neo4j** is the world's leading graph database. It is a high-performance graph storage system with all the features required by a mature and powerful database, such as a user-friendly query language and ACID transactions. Developers can work with flexible node and relationship network structures instead of static tables while enjoying the benefits of enterprise-grade databases. For many applications, Neo4j offers orders-of-magnitude performance advantages over relational databases. ## Core Features ### 1. Graph Data Model - **Nodes**: The basic unit of a graph database, representing entities. - **Relationships**: Directed connections between nodes, representing relationships between entities. - **Properties**: Key-value pairs attached to nodes and relationships to describe their characteristics. ### 2. Cypher Query Language - **Declarative Query Language**: Similar to SQL but designed for graph databases. - **Pattern Matching**: Query based on graph patterns, simple and efficient. - **Read and Write Operations**: Supports complex queries, inserts, updates, and deletions. ### 3. ACID Transaction Support - **Atomicity**: Ensures all operations succeed or roll back on failure. - **Consistency**: Transitions the database from one consistent state to another. - **Isolation**: Prevents interference between concurrent transactions. - **Durability**: Ensures data persistence after transaction commits. ### 4. High Performance and Scalability - **In-Memory Graph Processing**: Most operations are completed in memory for speed. - **Horizontal Scalability**: Supports sharding and replication for large-scale data processing. ### 5. Visualization Tools - **Neo4j Browser**: Built-in interactive visualization tool for queries and results. - **Neo4j Bloom**: Advanced data visualization and exploration tool for business users. ### 6. Security and Access Control - **Authentication and Authorization**: Role-based access control to ensure data security. - **SSL/TLS Encryption**: Protects data transmission security.