CCS Network Fundamentals

Question 1

What is the purpose of the OSI model?

Accepted Answer

To provide a standard framework for understanding network communications

Answer

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?

Accepted Answer

TCP provides reliable, ordered delivery; UDP provides faster, connectionless delivery

Answer

TCP ensures reliable delivery through acknowledgments and retransmission, while UDP prioritizes speed without guaranteed delivery.

Question 3

What is an IP address?

Accepted Answer

A unique numerical identifier assigned to each device on a network

Answer

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?

Accepted Answer

To monitor and control incoming and outgoing network traffic based on security rules

Answer

Firewalls act as a barrier between trusted and untrusted networks, filtering traffic according to defined security policies.

Question 5

What is DNS?

Accepted Answer

Domain Name System — translates domain names to IP addresses

Answer

DNS translates human-readable domain names into numerical IP addresses that computers use to identify each other.

(CCS) Certified Coding Specialist Practice Test