Network Technology Associate Flashcards

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

Answer: Transport layer

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

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

Answer: Prevent routing loops by blocking redundant paths

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

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

Answer: VLAN

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

Which IPv4 address class is designed for multicast communications?

Answer: Class D

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

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

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

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

Which protocol operates at Layer 3 of the OSI model and is responsible for logical addressing and routing?

Answer: IP

IP (Internet Protocol) operates at the Network layer (Layer 3) and handles logical addressing and packet routing between networks.

In subnetting, what is the function of a subnet mask?

Answer: Identify which bits of an IP address represent the network and which represent hosts

A subnet mask uses binary ones to mark the network portion and binary zeros to mark the host portion of an IP address.