[March 12, 2025] Master the Cisco 100-150 CCST Networking Exam with Free Practice Questions

If you’re aiming to build a strong foundation in networking, the Cisco 100-150 CCST Networking Exam is your gateway to validating essential networking skills. As part of Cisco’s entry-level certifications, the CCST Networking certification ensures candidates understand fundamental networking concepts, security, and troubleshooting. Whether you’re a beginner in IT or an aspiring network engineer, passing this exam can open new career opportunities in the tech industry. Test your knowledge with these sample questions and check if you’re ready for the exam.

Free Cisco 100-150 CCST Networking Practice Questions

1.What is the most compressed valid format of the IPv6 address 2001 :0db8:0000:0016:0000:001b: 2000:0056?

A. 2001:db8: : 16: : 1b:2:56

B. 2001:db8: : 16: : 1b: 2000: 56

C. 2001:db8: 16: :1b:2:56

D. 2001:db8: 0:16: :1b: 2000:56

Answer: D

Explanation:

IPv6 addresses can be compressed by removing leading zeros and replacing consecutive groups of zeros with a double colon (::). Here’s how to compress the address 2001:0db8:0000:0016:0000:001b:2000:0056:

Remove leading zeros from each segment:

2001:db8:0000:0016:0000:001b:2000:0056 becomes 2001:db8:0:16:0:1b:2000:56

Replace the longest sequence of consecutive zeros with a double colon (::). In this case, the two consecutive zeros between the 16 and 1b:

2001:db8:0:16::1b:2000:56

Thus, the most compressed valid format of the IPv6 address is 2001:db8:0:16::1b:2000:56.

Reference: =

Cisco Learning Network

IPv6 Addressing (Cisco)

2.HOTSPOT

For each statement about bandwidth and throughput, select True or False. Note: You will receive partial credit for each correct selection.

Answer:

Explanation:

Statement 1: Low bandwidth can increase network latency.

True: Low bandwidth can result in increased network latency because the network may become congested, leading to delays in data transmission.

Statement 2: High levels of network latency decrease network bandwidth.

False: High levels of network latency do not decrease the available network bandwidth, but they do affect the perceived performance and throughput of the network.

Statement 3: You can increase throughput by decreasing network latency.

True: Decreasing network latency can increase throughput because data can be transmitted more quickly and efficiently without delays.

Bandwidth vs. Latency: Bandwidth refers to the maximum rate at which data can be transferred over a network path. Latency is the time it takes for a data packet to travel from the source to the destination.

Low bandwidth can cause network congestion, which can increase latency as packets wait to be transmitted.

High latency does not reduce the actual bandwidth but can affect the overall performance and efficiency of data transmission.

Reducing latency can lead to higher throughput because the network can handle more data in a given period without delays.

Reference: Network Performance Metrics: Cisco Network Performance

Understanding Bandwidth and Latency: Bandwidth vs. Latency

3.DRAG DROP

Move each protocol from the list on the left to its correct example on the right.

Answer:

Explanation:

The correct matching of the protocols to their examples is as follows:

DHCP: Assign the reserved IP address 10.10.10.200 to a web server at your company.

DNS: Perform a query to translate companypro.net to an IP address.

ICMP: Perform a ping to ensure that a server is responding to network connections.

Here’s how each protocol corresponds to its example:

DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to devices on a network.

In this case, DHCP would be used to assign the reserved IP address 10.10.10.200 to a web server.

DNS (Domain Name System) is used to translate domain names into IP addresses. Therefore, to translate companypro.net to an IP address, DNS would be utilized.

ICMP (Internet Control Message Protocol) is used for sending error messages and operational information indicating success or failure when communicating with another IP address. An example of this is using the ping command to check if a server is responding to network connections.

These protocols are essential for the smooth operation of networks and the internet.

Perform a query to translate companypro.net to an IP address.

DNS (Domain Name System): DNS is used to resolve domain names to IP addresses.

Assign the reserved IP address 10.10.10.200 to a web server at your company.

DHCP (Dynamic Host Configuration Protocol): DHCP is used to assign IP addresses to devices on a network.

Perform a ping to ensure that a server is responding to network connections.

ICMP (Internet Control Message Protocol): ICMP is used by network devices to send error messages and operational information, and it is the protocol used by the ping command.

DNS (Domain Name System): DNS translates human-friendly domain names like “companypro.net” into IP addresses that computers use to identify each other on the network.

DHCP (Dynamic Host Configuration Protocol): DHCP automatically assigns IP addresses to devices on a network, ensuring that no two devices have the same IP address.

ICMP (Internet Control Message Protocol): ICMP is used for diagnostic or control purposes, and the ping command uses ICMP to test the reachability of a host on an IP network.

Reference: DNS Basics: What is DNS?

DHCP Overview: What is DHCP?

ICMP and Ping: Understanding ICMP

4.Which protocol allows you to securely upload files to another computer on the internet?

A. SFTP

B. ICMP

C. NTP

D. HTTP

Answer: A

Explanation:

SFTP, or Secure File Transfer Protocol, is a protocol that allows for secure file transfer capabilities between networked hosts. It is a secure extension of the File Transfer Protocol (FTP). SFTP encrypts both commands and data, preventing passwords and sensitive information from being transmitted openly over the network. It is typically used for secure file transfers over the internet and is built on the Secure Shell (SSH) protocol1.

Reference: =

• What Is SFTP? (Secure File Transfer Protocol)

• How to Use SFTP to Safely Transfer Files: A Step-by-Step Guide

• Secure File Transfers: Best Practices, Protocols And Tools

The Secure File Transfer Protocol (SFTP) is a secure version of the File Transfer Protocol (FTP) that uses SSH (Secure Shell) to encrypt all commands and data. This ensures that sensitive information, such as usernames, passwords, and files being transferred, are securely transmitted over the network.

• ICMP (Internet Control Message Protocol) is used for network diagnostics and is not designed for file transfer.

• NTP (Network Time Protocol) is used to synchronize clocks between computer systems and is not related to file transfer.

• HTTP (HyperText Transfer Protocol) is used for transmitting web pages over the internet and does not inherently provide secure file transfer capabilities.

Thus, the correct protocol that allows secure uploading of files to another computer on the internet is SFTP.

Reference: =

• Cisco Learning Network

• SFTP Overview (Cisco)

5.A local company requires two networks in two new buildings. The addresses used in these networks must be in the private network range.

Which two address ranges should the company use? Note: You will receive partial credit for each correct selection. (Choose 2.)

A. 172.16.0.0 to 172.31.255.255

B. 192.16.0.0 to 192.16.255.255

C. 11.0.0.0 to 11.255.255.255

D. 192.168.0.0 to 192.168.255.255

Answer: AD

Explanation:

The private IP address ranges that are set aside specifically for use within private networks and not routable on the internet are as follows:

Class A: 10.0.0.0 to 10.255.255.255

Class B: 172.16.0.0 to 172.31.255.255

Class C: 192.168.0.0 to 192.168.255.255

These ranges are defined by the Internet Assigned Numbers Authority (IANA) and are used for local communications within a private network123.

Given the options:

A. 172.16.0.0 to 172.31.255.255 falls within the Class B private range.

B. 192.16.0.0 to 192.16.255.255 is not a recognized private IP range.

C. 11.0.0.0 to 11.255.255.255 is not a recognized private IP range.

D. 192.168.0.0 to 192.168.255.255 falls within the Class C private range.

Therefore, the correct selections that the company should use for their private networks are A and D.

Reference: =

Reserved IP addresses on Wikipedia

Private IP Addresses in Networking – GeeksforGeeks

Understanding Private IP Ranges, Uses, Benefits, and Warnings

6.A Cisco PoE switch is shown in the following image.

Which type of port will provide both data connectivity and power to an IP phone?

A. Port identified with number 2

B. Ports identified with numbers 3 and 4

C. Ports identified with number 6

D. Ports identified with number 7

Answer: C

Explanation:

In the provided image of the Cisco PoE switch, the ports identified with number 6 are the standard RJ-45 Ethernet ports typically found on switches that provide both data connectivity and Power over Ethernet (PoE). PoE ports are designed to supply power to devices such as IP phones, wireless access points, and other PoE-enabled devices directly through the Ethernet cable.

Ports:

• 2: Console port (for management and configuration)

• 3 and 4: Specific function ports (often for management)

• 6: RJ-45 Ethernet ports (capable of providing PoE)

• 7: SFP ports (for fiber connections, typically do not provide PoE) Thus, the correct answer is C. Ports identified with number 6.

Reference: =

• Cisco Catalyst 2960-L Series Switches Data Sheet

• Cisco PoE Overview

7.During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?

A. Network

B. Transport

C. Data Link

D. Session

Answer: C

Explanation:

During the data encapsulation process, the Data Link layer of the OSI model is responsible for adding a header that contains MAC addressing information and a trailer used for error checking. The header typically includes the source and destination MAC addresses, while the trailer contains a Frame Check Sequence (FCS) which is used for error detection1.

The Data Link layer ensures that messages are delivered to the proper device on a LAN using hardware addresses and translates messages from the Network layer into bits for the Physical layer to transmit. It also controls how data is placed onto the medium and is received from the medium through the physical hardware.

Reference: =

The OSI Model – The 7 Layers of Networking Explained in Plain English

OSI Model – Network Direction

Which layer adds both header and trailer to the data?

What is OSI Model | 7 Layers Explained – GeeksforGeeks

8.What is the purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch?

A. To enable the switch to act as a default gateway for the attached devices

B. To enable the switch to resolve URLs for the attached the devices

C. To enable the switch to provide DHCP services to other switches in the network

D. To enable access to the CLI on the switch through Telnet or SSH

Answer: D

Explanation:

The primary purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch is to facilitate remote management of the switch. By configuring an IP address on the management VLAN, network administrators can access the switch’s Command Line Interface (CLI) remotely using protocols such as Telnet or Secure Shell (SSH). This allows for convenient configuration changes, monitoring, and troubleshooting without needing physical access to the switch1.

Reference: =

• Understanding the Management VLAN

• Cisco – VLAN Configuration Guide

• Remote Management of Switches

Assigning an IP address to the management VLAN interface (often the VLAN 1 interface by default) on a Layer 2 switch allows network administrators to remotely manage the switch using protocols such as Telnet or SSH. This IP address does not affect the switch’s ability to route traffic between VLANs but provides a means to access and configure the switch through its Command Line Interface (CLI).

• A: The switch does not act as a default gateway; this is typically a function of a Layer 3 device like a router.

• B: The switch does not resolve URLs; this is typically a function of DNS servers.

• C: The switch can relay DHCP requests but does not typically provide DHCP services itself; this is usually done by a dedicated DHCP server or router.

Thus, the correct answer is D. To enable access to the CLI on the switch through Telnet or SSH.

Reference: =

• Cisco VLAN Management Overview

• Cisco Catalyst Switch Management

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