3.4C Characteristics of computing networks

Why is UDP often used for live video streaming instead of TCP?

• UDP allows faster data transfer without retransmissions

• UDP encrypts data more securely than TCP

• UDP uses MAC addresses for transmission

• UDP blocks unauthorized access automatically

What role does DNS play in internet communication?

• It encrypts data before transmission

• It converts domain names into IP addresses

• It assigns MAC addresses to devices

• It prioritizes certain websites for faster access

How does a Virtual Private Network (VPN) enhance privacy and security?

• By encrypting internet traffic and hiding IP addresses

• By increasing internet speed

• By providing free internet access

• By blocking all online ads

What is the main advantage of using a proxy server in a network?

• It assigns IP addresses to new devices

• It provides anonymity and filters network traffic

• It increases DNS resolution speed

• It compresses data before transmission

How does a firewall protect a network?

• It increases internet speed

• It filters incoming and outgoing network traffic based on rules

• It assigns dynamic IP addresses

• It converts URLs into IP addresses

A company notices that some employees are unable to access certain external websites. What could be causing this?

• A firewall or proxy server is blocking access

• The company switched to IPv6

• The employees’ MAC addresses have changed

• The company is using UDP instead of TCP

A company wants to ensure secure remote access to its internal network. Which of the following is the best approach?

• Using an HTTP proxy

• Setting up a Virtual Private Network (VPN)

• Disabling firewalls to improve speed

• Assigning public IP addresses to internal computers

Why might a network administrator implement Quality of Service (QoS) policies?

• To prioritize bandwidth for critical applications like video conferencing

• To increase the number of connected devices

• To slow down all network traffic evenly

• To prevent encryption on sensitive data

Why is multi-factor authentication (MFA) important in network security?

• It reduces the number of passwords users need to remember

• It allows users to bypass firewalls

• It requires multiple verification methods, making unauthorized access harder

• It improves internet speed

Which statement best explains the advantage of using the layered networking model?

• It makes networks more complicated

• It ensures that every device has a unique MAC address

• It allows different technologies to interoperate smoothly

• It increases the cost of network implementation