Glossary of Data Communication Terms

---

## **Glossary of Data Communication Terms**

Understanding the key terms in data communication is essential for IT students, professionals, and anyone interested in networking. Here’s a glossary of important terms in English, with definitions and examples.

---

### **1. Bandwidth**

**Definition:** The maximum amount of data that can be transmitted over a network per second.

**Example:** “Streaming HD videos requires a high bandwidth connection.”

### **2. Latency**

**Definition:** The time delay between sending and receiving data over a network.

**Example:** “High latency can cause delays in online gaming.”

### **3. Packet**

**Definition:** A small unit of data sent over a network.

**Example:** “Large files are broken into packets for faster transmission.”

### **4. Protocol**

**Definition:** A set of rules that govern how data is transmitted and received.

**Example:** “HTTP and TCP/IP are common protocols used in networking.”

### **5. Router**

**Definition:** A device that connects different networks and directs data packets to their destination.

**Example:** “The router ensures that data reaches the correct server.”

### **6. Switch**

**Definition:** A device that connects multiple devices within the same network and manages data traffic efficiently.

**Example:** “We upgraded our switch to reduce network congestion.”

### **7. Firewall**

**Definition:** A security system that monitors and controls incoming and outgoing network traffic.

**Example:** “The company uses a firewall to block unauthorized access.”

### **8. IP Address**

**Definition:** A unique identifier assigned to each device on a network.

**Example:** “Please check your IP address before connecting to the server.”

### **9. LAN (Local Area Network)**

**Definition:** A network that connects devices in a small geographic area, like an office or home.

**Example:** “All office computers are connected through a LAN.”

### **10. WAN (Wide Area Network)**

**Definition:** A network that connects multiple LANs across a large geographic area.

**Example:** “The company’s branch offices are connected via a WAN.”

---

### **Tips for Using This Glossary**

1. Create flashcards for each term to memorize definitions.

2. Use each term in sentences to practice context.

3. Watch English tutorials on networking to hear these terms in real-life usage.

Having a strong grasp of these terms will help you communicate confidently about data communication in English, whether in class, at work, or in professional discussions.

---

Location: