Free CCST-Networking: Cisco Certified Support Technician (CCST) NetworkingExam Exam Questions and Answers
37 verified practice questions for CCST-Networking.
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Last updated: September 19, 2026
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Question #1
You need to connect a computer's network adapter to a switch using a 1000BASE-T cable. Which connector should you use?
Please select an optionIncorrectCorrect answer: D
•1000BASE-T Cable: This refers to Gigabit Ethernet over twisted-pair cables (Cat 5e or higher). •Connector: RJ-45 connectors are used for Ethernet cables, including those used for 1000BASE-T. •Coax: Used for cable TV and older Ethernet standards like 10BASE2. •RJ-11: Used for telephone connections. •OS2 LC: Used for fiber optic connections. References: •Ethernet Standards and Cables: Ethernet Cable Guide
Was this answer correct?Question #2
A support technician examines the front panel of a Cisco switch and sees 4 Ethernet cables connected in the first four ports. Ports 1, 2, and 3 have a green LED. Port 4 has a blinking green light. What is the state of the Port 4?
Please select an optionIncorrectCorrect answer: C
On a Cisco switch, a port with a blinking green LED typically indicates that the port is up (active) and is currently transmitting or receiving data. This is a normal state indicating active traffic on the port. •A. Link is up with cable malfunctions: Usually indicated by an amber or blinking amber light. •B. Link is up and not stable: Not typically indicated by a green blinking light. •D. Link is up and there is no activity: Would be indicated by a solid green light withoutblinking. Thus, the correct answer is C. Link is up and active. References := •Cisco Switch LED Indicators •Cisco Ethernet Switch LED Patterns
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Which standard contains the specifications for Wi-Fi networks?
Please select an optionIncorrectCorrect answer: C
The IEEE 802.11 standard contains the specifications for Wi-Fi networks. It is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in various frequencies, including but not limited to 2.4 GHz, 5 GHz, and 6 GHz1. This standard is maintained by the Institute of Electrical and Electronics Engineers (IEEE) and is commonly referred to as Wi-Fi. The standard has evolved over time to include several amendments that improve speed, range, and reliability of wireless networks. References := •The Most Common Wi-Fi Standards and Types, Explained •802.11 Standards Explained: 802.11ax, 802.11ac, 802.11b/g/n, 802.11a •Wi-Fi Standards Explained - GeeksforGeeks =========================
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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?
Please select an optionIncorrectCorrect answer: C
A Layer 2 switch that has no MAC table entry for the destination floods the unknown unicast frame out all active ports except the ingress port (G0/1, where PC-A is connected). Switches do not query other switches or send ARP requests to learn MAC addresses. Correct answer: C.
Was this answer correct?Question #5
An engineer configured a new VLAN named VLAN2 for the Data Center team. When the teamtries to ping addresses outside VLAN2 from a computer in VLAN2, they are unable to reach them. What should the engineer configure?
Please select an optionIncorrectCorrect answer: C
When devices within a VLAN are unable to reach addresses outside their VLAN, it typically indicates that they do not have a configured path to external networks. The engineer should configure a default gateway for VLAN2. The default gateway is the IP address of the router's interface that is connected to the VLAN, which will route traffic from the VLAN to other networks12. References := •Understanding and Configuring VLAN Routing and Bridging on a Router Using the IRB Feature •VLAN 2 not able to ping gateway - Cisco Community ========================= •VLANs: Virtual Local Area Networks (VLANs) logically segment network traffic to improve security and performance. Devices within the same VLAN can communicate directly. •Default Gateway: For devices in VLAN2 to communicate with devices outside their VLAN, they need a default gateway configured. The default gateway is typically a router or Layer 3 switch that routes traffic between different VLANs and subnets. •Additional VLAN: Not needed in this scenario as the issue is related to routing traffic outside VLAN2, not creating another VLAN. •Default Route: While a default route on the router may be necessary, the primary issue for devices within VLAN2 is to have a configured default gateway. •Static Route: This is used on routers to manually specify routes to specific networks but does not address the need for a default gateway on the client devices. References: •Cisco VLAN Configuration Guide: Cisco VLAN Configuration •Understanding and Configuring VLANs: VLANs Guide
Was this answer correct?Question #6
Which information is included in the header of a UDP segment?
Please select an optionIncorrectCorrect answer: C
The header of a UDP (User Datagram Protocol) segment includesport numbers. Specifically, it contains the source port number and the destination port number, which are used to identify the sending and receiving applications. UDP headers do not include IP addresses or MAC addresses, as those are part of the IP and Ethernet frame headers, respectively.Additionally, UDP does not use sequence numbers, which are a feature of TCP (Transmission Control Protocol) for ensuring reliable delivery of data segments1. References:= • Segmentation Explained with TCP and UDP Header • User Datagram Protocol (UDP) - GeeksforGeeks • Which three fields are used in a UDP segment header ========================= • UDP Header: The header of a UDP segment includes the following key fields: • IP Addresses: These are included in the IP header, not the UDP header. • Sequence Numbers: These are part of the TCP header, not UDP. • MAC Addresses: These are part of the Ethernet frame header and are not included in the UDP header. References: • RFC 768 - User Datagram Protocol: RFC 768 • Cisco Guide on UDP: Cisco UDP Guide
Was this answer correct?Question #7
You want to store files that will be accessible by every user on your network. Which endpoint device do you need?
Please select an optionIncorrectCorrect answer: B
To store files that will be accessible by every user on a network, you would need aserver. A server is a computer system that provides data to other computers. It can serve data to systems on a local network (LAN) or a wide network (WAN) over the internet.In this context, a file server would be set up to store and manage files, allowing users on the network to access them from their own devices1. References:= • What is a Server? • Understanding Servers and Their Functions A server is a computer designed to process requests and deliver data to other computers over a local network or the internet. In this case, to store files that will be accessible by every user on the network, a file server is the appropriate endpoint device. It provides a centralized location for storing and managing files, allowing users to access and share files easily. • A. Access point: Provides wireless connectivity to a network. • C. Hub: A basic networking device that connects multiple Ethernet devices together, making them act as a single network segment. • D. Switch: A networking device that connects devices on a computer network by using packet switching to forward data to the destination device. Thus, the correct answer is B. Server. References:= • File Server Overview (Cisco) • Server Roles in Networking (Cisco)
Was this answer correct?Question #8
A user reports that a company website is not available. The help desk technician issues a tracert command to determine if the server hosting the website is reachable over the network. The output of the command is shown as follows: What can you tell from the command output?
Please select an optionIncorrectCorrect answer: C
Hops 4 and 5 reply, and hop 5 is the destination 192.168.1.10, so the server is reachable. The timeout at hop 3 only means that router does not answer traceroute probes (often ICMP is filtered); it still forwards traffic. Correct answer: C.
Was this answer correct?Question #9
Which device protects the network by permitting or denying traffic based on IP address, port number, or application?
Please select an optionIncorrectCorrect answer: A
• Firewall: A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It permits or denies traffic based on IP addresses, port numbers, or applications. • Access Point: This is a device that allows wireless devices to connect to a wired network using Wi-Fi. It does not perform traffic filtering based on IP, port, or application. • VPN Gateway: This device allows for secure connections between networks over the internet, but it is not primarily used for traffic filtering based on IP, port, or application. • Intrusion Detection System (IDS): This device monitors network traffic for suspicious activity and policy violations, but it does not actively permit or deny traffic. References: • Understanding Firewalls: Firewall Basics
Was this answer correct?Question #10
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?
Please select an optionIncorrectCorrect answer: D
The CIDR (Classless Inter-Domain Routing) notation for the subnet mask 255.255.252.0 is /22. This notation indicates that the first 22 bits of the IP address are used for network identification, and the remaining bits are used for host addresses within the network1. References := •Subnet Cheat Sheet – 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References ========================= •Subnet Mask to CIDR Notation: The given subnet mask is 255.255.252.0. To convert this to CIDR notation: •Convert the subnet mask to binary: 11111111.11111111.11111100.00000000 •Count the number of consecutive 1s in the binary form: There are 22 ones. •Therefore, the CIDR notation is /22. References: •Understanding Subnetting and CIDR: Cisco CIDR Guide
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