CCST Level 3

Question 1

Which Cisco IOS command displays the currently running configuration?

Accepted Answer

show running-config

Answer

The 'show running-config' command displays the active configuration in RAM.

Question 2

What is the purpose of the subnet mask in IPv4 networking?

Accepted Answer

To divide an IP address into network and host portions

Answer

A subnet mask determines which bits identify the network and which identify the host.

Question 3

Which OSI layer handles logical addressing and routing?

Accepted Answer

Layer 3 - Network

Answer

Layer 3 (Network) handles IP addresses and routing between different networks.

Question 4

What does the TCP three-way handshake establish?

Accepted Answer

A reliable connection between two hosts using SYN, SYN-ACK, and ACK messages

Answer

The three-way handshake (SYN, SYN-ACK, ACK) synchronizes sequence numbers and establishes a reliable connection.

Question 5

What is the function of DHCP in a network?

Accepted Answer

To automatically assign IP addresses and network configuration to devices

Answer

DHCP automatically assigns IP addresses, subnet masks, gateways, DNS servers, and other parameters.

(CCST) Cisco Certified Support Technician Practice Test