CCST CCST Network Devices & Infrastructure 1

Question 1

What is the primary function of a network switch compared to a hub?

Accepted Answer

A switch forwards traffic only to the destination MAC address port; a hub broadcasts to all ports

Answer

A switch uses a MAC address table to forward frames only to the specific port associated with the destination MAC address, reducing unnecessary traffic, while a hub broadcasts to all ports.

Question 2

Which Cisco IOS command displays the MAC address table on a Catalyst switch?

Accepted Answer

show mac address-table

Answer

The 'show mac address-table' command on a Cisco Catalyst switch displays all learned MAC addresses and their associated port and VLAN information.

Question 3

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

Accepted Answer

To prevent Layer 2 switching loops by blocking redundant paths

Answer

STP (IEEE 802.1D) prevents broadcast storms and Layer 2 loops in networks with redundant switch paths by logically blocking all but one active path.

Question 4

Which device operates at Layer 3 of the OSI model and makes forwarding decisions based on IP addresses?

Accepted Answer

Router

Answer

A router operates at Layer 3 (Network layer) and uses routing tables to forward packets based on destination IP addresses between different networks.

Question 5

What does PoE (Power over Ethernet) allow network administrators to do?

Accepted Answer

Deliver electrical power to devices like IP phones and APs through the Ethernet cable

Answer

PoE (IEEE 802.3af/at/bt) allows network switches to deliver DC electrical power alongside data over standard Ethernet cabling to devices like IP phones, APs, and cameras.

(CCST) Cisco Certified Support Technician Networking Practice Test

(CCST) Cisco Certified Support Technician Networking Practice Test

CCST CCST Network Devices & Infrastructure 1