Echocardiogram Network Fundamentals 1 — Questions and Answers
Question 1: What is the purpose of the OSI model?
- To provide a standard framework for understanding network communications (Correct answer)
- To replace all networking equipment
- To encrypt all network traffic
- To monitor network performance only
Correct answer: To provide a standard framework for understanding network communications
The OSI model provides a conceptual framework with seven layers that standardizes network communication functions.
Question 2: What is the difference between TCP and UDP?
- TCP provides reliable, ordered delivery; UDP provides faster, connectionless delivery (Correct answer)
- They are identical protocols
- TCP is for wireless; UDP is for wired connections
- UDP is more reliable than TCP
Correct answer: TCP provides reliable, ordered delivery; UDP provides faster, connectionless delivery
TCP ensures reliable delivery through acknowledgments and retransmission, while UDP prioritizes speed without guaranteed delivery.
Question 3: What is an IP address?
- A unique numerical identifier assigned to each device on a network (Correct answer)
- A physical address of a network device
- A type of network cable
- A security protocol
Correct answer: A unique numerical identifier assigned to each device on a network
IP addresses uniquely identify devices on a network, enabling routing of data to the correct destination.
Question 4: What is the function of a firewall?
- To monitor and control incoming and outgoing network traffic based on security rules (Correct answer)
- To boost internet speed
- To store website data locally
- To compress network traffic
Correct answer: To monitor and control incoming and outgoing network traffic based on security rules
Firewalls act as a barrier between trusted and untrusted networks, filtering traffic according to defined security policies.
Question 5: What is DNS?
- Domain Name System — translates domain names to IP addresses (Correct answer)
- Digital Network Security
- Data Network Switch
- Distributed Node System
Correct answer: Domain Name System — translates domain names to IP addresses
DNS translates human-readable domain names into numerical IP addresses that computers use to identify each other.
Question 6: What is a VPN?
- A Virtual Private Network that creates an encrypted connection over a public network (Correct answer)
- A Very Private Network that uses special hardware
- A Visual Processing Node for graphics
- A Verified Public Network
Correct answer: A Virtual Private Network that creates an encrypted connection over a public network
A VPN creates a secure, encrypted tunnel over a public network, protecting data privacy and enabling remote access.
Echocardiogram Network Fundamentals 1
What is the purpose of the OSI model?