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CISCO CCST-Networking Free Exam Questions

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1 / 60

What is a common use of a DMZ (Demilitarized Zone) in network security?

To manage DNS requests

To prevent IP address conflicts

To route data between different subnets

To separate private networks from the public internet

2 / 60

What is the purpose of an IP address in a network?

To provide security for network traffic

To route data between different networks

To uniquely identify a device within a network

To define the port number for communication

3 / 60

Which layer of the OSI model is responsible for data encryption and decryption?

Presentation Layer

Session Layer

Transport Layer

Application Layer

4 / 60

Which of the following protocols is used for secure communication over a network?

HTTP

SSH

FTP

POP3

5 / 60

What is the function of the ARP protocol?

To assign an IP address to a device

To convert an IP address to a MAC address

To resolve domain names to IP addresses

To encrypt data transmitted over a network

6 / 60

Which of the following is a valid private IP address range in IPv4?

10.0.0.0 - 10.255.255.255

172.31.0.0 - 172.31.255.255

192.168.1.1 - 192.168.255.254

All of the above

7 / 60

What is the primary difference between IPv4 and IPv6?

IPv6 is more secure than IPv4

IPv6 supports fewer devices than IPv4

IPv6 uses hexadecimal addresses, while IPv4 uses decimal

IPv4 addresses are 128 bits long, while IPv6 addresses are 32 bits long

8 / 60

What is the purpose of the "traceroute" command?

To check the IP address configuration

To resolve domain names to IP addresses

To verify the physical connection of a device

To display the path that data takes to reach its destination

9 / 60

Which of the following devices operates at Layer 2 of the OSI model?

Hub

Switch

Router

Modem

10 / 60

What type of cable is typically used for short-distance connections in a local area network (LAN)?

Coaxial cable

Twisted pair cable

Fiber optic cable

Power over Ethernet cable

11 / 60

What is the maximum length of a Category 5 (Cat 5) Ethernet cable?

10 meters

50 meters

100 meters

200 meters

12 / 60

In a TCP/IP model, which layer is responsible for end-to-end communication and error recovery?

Application Layer

Network Layer

Transport Layer

Data Link Layer

13 / 60

What is the purpose of a MAC address in networking?

It uniquely identifies devices within a local network

It assigns an IP address to a device

It encrypts data during transmission

It is used to route packets between networks

14 / 60

Which of the following is the main function of a hub in a network?

To assign IP addresses to devices

To route data between different networks

To filter data and forward it to the correct device

To amplify and distribute data to all devices within a network

15 / 60

Which of the following is used to prevent broadcast storms in a network?

Firewall

Spanning Tree Protocol (STP)

Switch

Router

16 / 60

Which of the following is a Layer 3 device that uses IP addressing for routing data?

Hub

Switch

Router

Modem

17 / 60

What does the term "collisions" refer to in a network?

The event where two devices attempt to send data simultaneously on the same medium

The overlap of IP addresses on a network

The interference caused by signal degradation

The security breach of unauthorized data transmission

18 / 60

What is a key characteristic of a router compared to a switch?

A router operates at Layer 2 of the OSI model

A router routes traffic between different networks

A router connects devices within a single network

A router can only forward data within a single LAN

19 / 60

Which of the following network topologies is most commonly used in Ethernet LANs?

Star

Bus

Ring

Mesh

20 / 60

What is the main advantage of using fiber optic cables over copper cables?

Fiber optic cables are less expensive

Fiber optic cables are easier to install

Fiber optic cables can carry data over longer distances without degradation

Fiber optic cables have lower bandwidth

21 / 60

What is the purpose of a VLAN in networking?

To manage IP address assignment

To encrypt traffic between networks

To assign a static IP to each device in a network

To create multiple virtual networks on the same physical network

22 / 60

Which of the following protocols operates at Layer 4 of the OSI model?

FTP

TCP

HTTP

Ethernet

23 / 60

Which of the following is a common use case for NAT (Network Address Translation)?

To hide internal IP addresses from the external network

To assign dynamic IP addresses to devices

To route data between different subnets

To encrypt data sent over the network

24 / 60

What is the purpose of a subnet mask in IP networking?

It identifies the gateway for routing traffic

It defines the network portion and host portion of an IP address

It specifies the IP address range for a network

It ensures secure communication between devices

25 / 60

Which of the following is a characteristic of IPv6 addressing?

IPv6 addresses are 32 bits long

IPv6 is written in decimal format

IPv6 is not compatible with IPv4

IPv6 allows for a significantly larger address space than IPv4

26 / 60

What is the purpose of a DNS server?

It resolves domain names to IP addresses

It routes packets between different networks

It ensures secure connections between devices

It assigns IP addresses to devices on the network

27 / 60

Which of the following is true about a MAC address?

It is assigned dynamically

It is used by Layer 3 devices

It is unique to each network interface card (NIC)

It is used to assign IP addresses to devices

28 / 60

What is the role of a switch in a network?

It provides wireless connectivity

It manages network traffic between servers

It routes packets between different networks

It forwards data within the same local network

29 / 60

What is the maximum transmission distance for a single-mode fiber (SMF) connection using an 8-10 micron core?

2 km

5 km

40 km

100 km

30 / 60

Which of the following protocols is used to assign an IP address automatically to a device in a network?

FTP

SMTP

HTTP

DHCP

31 / 60

What does the "ping" command verify in a network?

The speed of the network

The security of the network

The physical connection between two devices

Whether the device is reachable over the network

32 / 60

Which cable type is used to connect a computer to a switch using a direct connection without a hub?

Coaxial cable

Crossover cable

Fiber optic cable

Straight-through cable

33 / 60

What is the primary purpose of a router in a network?

To provide wireless access

To connect devices within the same network

To route packets between different networks

To connect different servers within a data center

34 / 60

Which of the following is a primary characteristic of multi-mode fiber (MMF)?

Uses a single light path

Uses LED as the light source

Uses laser as the light source

Designed for long-distance communication

35 / 60

Which component of the AAA service model provides identity verification?

Auditing

Accounting

Authorization

Authentication

36 / 60

A cisco switch is not accessible from the network. You need to view its running configuration. Which out-of-band method can you use to access it?

SSH

SNMP

Console

Telnet

37 / 60

In the network shown in the following graphic, Switch1 is a layer 2 switch.

PC-A sends a frame to PC-C. Switch1 does not have a mapping entry for the MAC address of PC-C. Which action does Switch1 take?

Switch1 queries Switch2 for the MAC address of PC-C

Switch1 floods the frame out all active ports except port G0/1

Switch1 sends an ARP request to obtain the MAC address of PC-C

Switch1 drops the frame and sends an error message back to PC-A

38 / 60

You want to store files that will be accessible by every user on your network. Which endpoint device do you need?

Hub

Switch

Server

Access point

39 / 60

Which standard contains the specifications for Wi-Fi networks?

LTE

GSM

IEEE 802.3

IEEE 802.11

EIA/TIA 568A

40 / 60

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

NTP

SFTP

ICMP

HTTP

41 / 60

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

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

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

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

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

42 / 60

A help desk technician receives the four trouble tickets listed below. Which ticket should receive the highest priority and be addressed first?

Ticket 1: A user requests relocation of a printer to a different network jack in the same office. The jack must be patched and made active

Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access

Ticket 3: A user reports that response time for a cloud-based application is slower than usual

Ticket 4: Two users report that wireless access in the cafeteria has been down for the last hour

43 / 60

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

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

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

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

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

44 / 60

You need to connect a computer's network adapter to a switch using a 1000BASE-T cable. Which connector should you use?

Coax

RJ-11

RJ-45

OS2 LC

45 / 60

Which wireless security option uses a pre-shared key to authenticate clients?

802.1x

WPA2-Personal

WPA2-Enterprise

46 / 60

Which information is included in the header of a UDP segment?

IP addresses

Port numbers

MAC addresses

Sequence numbers

47 / 60

An engineer configured a new VLAN named VLAN2 for the Data Center team. When the team tries to ping addresses outside VLAN2 from a computer in VLAN2, they are unable to reach them. What should the engineer configure?

Static route

Default route

Default gateway

Additional VLAN

48 / 60

A host is given the IP address 172.16.100.25 and the subnet mask 255.255.252.0. What is the CIDR notation for this address?

172.16.100.25 /20

172.16.100.25 /21

172.16.100.25 /22

172.16.100.25 /23

49 / 60

A user initiates a trouble ticket stating that an external web page is not loading. You determine that other resources both internal and external are still reachable. Which command can you use to help locate where the issue is in the network path to the external web page?

tracert

ping -t

nslookup

ipconfig/all

50 / 60

What is the importance of separating hot and cold air in a networking equipment room?

To provide a comfortable environment for technicians

To use the heat from the equipment more efficiently in the building

To prevent the mixing of hot and cold air, increasing equipment heating efficiency

To prevent the mixing of hot and cold air, increasing equipment cooling efficiency

51 / 60

Why is it important to manage cables through management hardware?

To aid in the end-to-end tracing of cables

Because engineers generally like neatness

To prevent cables from hanging off their connectors

Because OSHA regulations require well-organized cables

52 / 60

What diagrams are commonly used in network engineering?

Physical and logical

Overlay and routing

Topological and logical

Topological and physical

53 / 60

Do the color and status of lights on all routers and switches indicate the same things?

The colors and flashing patterns may vary between individual devices

Every network device uses the same colors and patterns of lights to mean the same thing

The colors of the lights always mean the same things, but the flashing patterns may vary between vendors

The colors of the lights may vary between vendors, but the flashing patterns always mean the same thing

54 / 60

What are the four common light indicators on network devices?

Green, operating correctly; green flashing, malfunctioning; yellow, passing traffic; red, disconnected

Green, operating correctly; green flashing, passing traffic; yellow, connecting or malfunctioned; red, malfunctioned

Green, passing traffic; green flashing, operating correctly; yellow, connecting or malfunctioned; red, malfunctioned

Green, malfunctioned; green flashing, passing traffic; yellow, connecting or malfunctioned; red, operating correctly

55 / 60

How are ports numbered on a router?

By the physical location of the port on the device

Port number, kind of port, module or slot, submodule

Module or slot, kind of port, submodule, and port number on the module

56 / 60

What is the primary purpose of the console port?

Carry customer traffic within the local network

Provide access to the device's command-line interface

Connect to a low-speed out-of-band management network

Carry customer traffic to destinations outside the local network

57 / 60

What is the primary purpose of the management network port?

Carry customer traffic within the local network

Provide access to the device's command-line interface

Connect to a low-speed out-of-band management network

Carry customer traffic to destinations outside the local network

58 / 60

Which device protects the network by permitting or denying traffic based on IP address, port number, or application?

Firewall

Access point

VPN gateway

Intrusion detection system

59 / 60

Which address is included in the 192.168.200.0/24 network?

192.168.1.13

192.168.199.13

192.168.200.13

192.168.201.13

60 / 60

Which command will display all the current operational settings configured on a Cisco router?

show version

show protocols

show startup-config

show running-config

Your score is

The average score is 68%

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Free 100-150 Practice Test – 2025 Updated

Prepare Smarter for the 100-150 Exam with Our Free and Accurate 100-150 Exam Questions – Updated for 2025.

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