CIW Network Technology Associate 2

Question 1

Which OSI layer is responsible for end-to-end error detection and flow control between two hosts?

Accepted Answer

Transport layer

Answer

The Transport layer (Layer 4) handles end-to-end error detection, flow control, and reliable delivery between hosts.

Question 2

What is the purpose of the Spanning Tree Protocol (STP) in a switched network?

Accepted Answer

Prevent routing loops by blocking redundant paths

Answer

STP prevents Layer 2 switching loops by placing redundant switch ports in a blocking state, keeping one active path.

Question 3

A network administrator wants to limit broadcast domains without using a router. Which technology should be used?

Accepted Answer

VLAN

Answer

VLANs (Virtual Local Area Networks) logically segment a network at Layer 2, creating separate broadcast domains on the same physical switch.

Question 4

Which IPv4 address class is designed for multicast communications?

Accepted Answer

Class D

Answer

Class D addresses (224.0.0.0–239.255.255.255) are reserved for multicast group communications.

Question 5

What does the acronym NAT stand for, and what problem does it primarily solve?

Accepted Answer

Network Address Translation — allows multiple private hosts to share a single public IP

Answer

NAT (Network Address Translation) maps private internal IP addresses to one or more public IP addresses, conserving the limited IPv4 address space.

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