CCST Networking Fundamentals — Questions and Answers

Question 1: What does LAN stand for?

Large Access Network
Local Area Network (Correct answer)
Long Area Network
Logical Access Node

Correct answer: Local Area Network

LAN stands for Local Area Network, which is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus, or office building. It allows devices to share resources and communicate with each other efficiently over short distances.

Question 2: What device connects multiple networks together?

Switch
Hub
Router (Correct answer)
Repeater

Correct answer: Router

A router is a networking device that connects multiple distinct networks, such as a local area network (LAN) to the internet (a wide area network, WAN). Its primary function is to forward data packets between these networks, making intelligent decisions about the best path for data to travel. Switches connect devices within a single network, while routers connect different networks together.

Question 3: What is the function of a switch?

Connect to internet
Amplify signals
Forward data to devices (Correct answer)
Store files

Correct answer: Forward data to devices

A network switch operates at the data link layer (Layer 2) of the OSI model and is designed to efficiently forward data frames to specific devices within the same local area network (LAN). Unlike a hub, which broadcasts data to all connected devices, a switch learns the MAC addresses of connected devices and sends data only to the intended recipient. This targeted forwarding improves network performance and reduces unnecessary traffic.

Question 4: What type of cable is commonly used in Ethernet networks?

Fiber
Twisted pair (Correct answer)
Coaxial
USB

Correct answer: Twisted pair

Twisted pair cable, specifically unshielded twisted pair (UTP) and shielded twisted pair (STP), is the most common type of cabling used in modern Ethernet networks. It consists of pairs of insulated wires twisted together to reduce electromagnetic interference and crosstalk. This design allows for reliable data transmission over short to medium distances, making it ideal for connecting computers and network devices within buildings.

Question 5: Which model has 7 layers of networking?

TCP/IP model
OSI model (Correct answer)
Ethernet
IP model

Correct answer: OSI model

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven distinct layers. Each layer performs specific tasks, from the physical transmission of data to application-level services. This layered approach helps in understanding and designing network architectures.

Question 6: What is the purpose of the MAC address?

Stores files
Encrypts data
Device identification (Correct answer)
Connects to router

Correct answer: Device identification

A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications within a network segment. It serves as a physical address that uniquely identifies a device on a local network, allowing switches to correctly forward data frames to the intended recipient. This address is hardcoded into the network interface card (NIC) by the manufacturer.

Question 7: What is a protocol?

A device
IP address
Set of rules (Correct answer)
Software tool

Correct answer: Set of rules

In networking, a protocol is a formal set of rules, conventions, and data formats that govern how devices communicate with each other. Protocols define the procedures for initiating, maintaining, and terminating a connection, as well as how data is formatted and exchanged. Examples include TCP, IP, HTTP, and FTP, all of which ensure orderly and understandable communication across networks.

Question 8: Which layer of the OSI model is responsible for routing?

Data link
Network layer (Correct answer)
Session layer
Transport layer

Correct answer: Network layer

The Network layer (Layer 3) of the OSI model is responsible for logical addressing and routing data packets across different networks. It determines the best path for data to travel from the source to the destination, using IP addresses for logical identification. Routers operate at this layer to connect disparate networks and forward packets between them.

Question 9: What is the purpose of DNS?

Saves passwords
Translates domain names (Correct answer)
Connects printers
Encrypts traffic

Correct answer: Translates domain names

DNS (Domain Name System) acts like a phonebook for the internet, translating human-readable domain names (e.g., google.com) into machine-readable IP addresses (e.g., 172.217.160.142). This translation is essential for web browsers and other applications to locate and connect to internet resources. Without DNS, users would have to remember complex numerical IP addresses to access websites.

CCST Networking Fundamentals

What does LAN stand for?