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Cisco Certified Support Technician (CCST) Networking practice questions

200 free questions with answers and explanations.

Practice test
  1. 101.A network technician is setting up a small office network and needs to connect several devices, including computers and printers, to the network. Which network component is primarily responsible for forwarding data frames between these devices within the same local area network?Networking Fundamentals
  2. 102.A large enterprise network uses a distributed architecture with multiple internal DNS servers. Users in one branch office are reporting issues resolving hostnames for servers located in another branch office, while external websites are resolving correctly. The network administrator suspects a problem with how DNS queries are forwarded or resolved internally. Which DNS server role is responsible for forwarding queries to other DNS servers when it cannot resolve a name locally?IP Services
  3. 103.A network technician is configuring a new wireless access point (AP) in a public library. To ensure maximum compatibility with older devices while also supporting newer, faster clients, which Wi-Fi standard should the technician primarily enable, considering it's widely adopted and offers good balance of speed and range for typical library use?Networking Fundamentals
  4. 104.A network administrator needs to assign a subnet to a new department with 60 hosts. The existing network uses a Class C IP address space (192.168.1.0/24). To accommodate the 60 hosts efficiently while minimizing wasted IP addresses, which subnet mask should be used?Networking Fundamentals
  5. 105.A network technician is configuring a new IPv6-enabled router. They need to assign a unique, publicly routable IPv6 address to an interface that can be accessed from anywhere on the global internet. Which type of IPv6 address should be configured?Networking Fundamentals
  6. 106.A network security team is analyzing log messages from a router and sees an entry with a severity level of 'Emergency (0)'. What does this severity level indicate about the event that occurred?IP Services
  7. 107.A network architect is designing a network for a new branch office that requires high availability and continuous operation, even if a single network device or link fails. Which design principle should be prioritized to meet these requirements?Networking Fundamentals
  8. 108.A network engineer is configuring a DNS server to handle a large number of internal domain names and their corresponding IP addresses. To improve query performance and reduce the load on the authoritative DNS servers, the engineer decides to implement a mechanism where the DNS server stores the results of previous queries for a specific duration. What is this mechanism called, and which parameter controls how long the results are stored?IP Services
  9. 109.A network administrator needs to assign a static IPv6 address to a server. The network prefix is 2001:db8:abcd:0001::/64, and the server's MAC address is 00:1A:2B:3C:4D:5E. If using EUI-64 (Extended Unique Identifier-64) to generate the interface identifier, what would be the resulting IPv6 address?Networking Fundamentals
  10. 110.A network administrator is troubleshooting connectivity issues on a wired Ethernet network. They notice that some cables are very susceptible to electromagnetic interference (EMI) from nearby fluorescent lights and machinery. Which type of Ethernet cable is most resistant to EMI due to its shielding?Networking Fundamentals
  11. 111.A company is deploying a new application that requires very low latency and minimal jitter, such as real-time financial trading data. The network team decides to implement QoS. Which DiffServ Per-Hop Behavior (PHB) is specifically designed to provide a low-loss, low-latency, low-jitter service, making it ideal for such time-sensitive traffic?IP Services
  12. 112.A small office is experiencing slow network speeds and frequent disconnections, particularly when large files are transferred between workstations connected to the same switch. The network administrator suspects that the existing network cabling might be a bottleneck. The current cabling is Category 5 (Cat5). Which cable type would provide a significant upgrade in performance for a Gigabit Ethernet network?Networking Fundamentals
  13. 113.A company is experiencing issues with its VoIP calls dropping and audio quality degradation during peak network usage. A network engineer is tasked with implementing a QoS mechanism to prioritize VoIP traffic over less time-sensitive data. Which QoS mechanism is designed to handle network congestion by actively dropping lower-priority packets to protect higher-priority traffic?IP Services
  14. 114.A network technician is setting up a small office network. They need to connect several devices, including computers, printers, and a server, to a central device that forwards data only to the intended recipient. Which network component should the technician choose for this purpose?Networking Fundamentals
  15. 115.A network administrator implements a QoS policy to mark all Voice over IP (VoIP) traffic with a Differentiated Services Code Point (DSCP) value of 'EF' (Expedited Forwarding). Which of the following is the primary purpose of applying this specific marking?IP Services
  16. 116.A network architect is planning a highly resilient data center network. They want to ensure that if one network path fails, data can automatically reroute through an alternative path with minimal disruption. Which networking concept is fundamental to achieving this goal?Networking Fundamentals
  17. 117.A network administrator is configuring a DHCP server. They want to ensure that a specific server always receives the same IP address from the DHCP pool, even if the server reboots or its lease expires. Which DHCP feature should the administrator implement?IP Services
  18. 118.A network administrator is setting up a new wireless network in a large warehouse. Due to the presence of many metal shelves and machinery, there are significant issues with signal attenuation and dead zones. Which wireless standard would be the most appropriate choice to help mitigate these issues by utilizing technologies like beamforming and MIMO, and operating in both 2.4 GHz and 5 GHz bands?Networking Fundamentals
  19. 119.A network administrator wants to ensure that all network devices in their organization have their internal clocks synchronized to prevent issues with log correlation and security timestamps. Which protocol should be implemented?IP Services
  20. 120.A network administrator needs to monitor the operational status and performance metrics of various network devices (routers, switches, servers) in real-time. They also want to receive immediate alerts if critical thresholds are exceeded. Which protocol is best suited for this purpose?IP Services
  21. 121.A company is experiencing intermittent voice over IP (VoIP) call quality issues, including choppy audio and delays, especially during peak network usage. Data traffic (web browsing, email) seems unaffected. Which QoS mechanism is most likely failing to prioritize the VoIP traffic correctly?IP Services
  22. 122.A network administrator is configuring a new server that needs to be accessible from the internet. The server will host a web application and requires a public IPv4 address. Which class of IPv4 addresses is typically used for public-facing servers and can be routed across the internet?Networking Fundamentals
  23. 123.A network administrator is configuring a DHCP server. They need to ensure that a specific server always receives the same IP address from the DHCP pool, even if the server is rebooted or its lease expires. What DHCP feature should the administrator configure?IP Services
  24. 124.A user reports that they can access websites by typing their IP addresses, but not by typing their domain names. Which IP service is most likely misconfigured or unavailable?IP Services
  25. 125.A network security team needs to monitor the operational status of network devices and receive alerts for critical events. They are implementing a solution that allows devices to proactively send notifications to a central management station. Which SNMP component is responsible for sending these unsolicited notifications?IP Services
  26. 126.A network technician is setting up a new virtualized environment on a single physical server. They need to create multiple virtual machines (VMs) and allow them to communicate with each other and with the external physical network. Which component is essential for enabling this network connectivity for the VMs?Networking Fundamentals
  27. 127.A company is expanding its network and needs to assign unique identifiers to all network interfaces. They are considering an addressing scheme that uses 128-bit addresses to support a massive number of devices and address future growth without NAT. Which addressing scheme are they planning to implement?Networking Fundamentals
  28. 128.A large enterprise network relies heavily on centralized logging for security auditing and troubleshooting. All network devices are configured to send their log messages to a Syslog server. If the Syslog server is unreachable, and the network devices are configured to only send logs with a specific facility, which of the following best describes the 'facility' in Syslog?IP Services
  29. 129.A network administrator is configuring a DHCP server to assign IP addresses to devices in a new subnet. Which of the following is the primary purpose of the DHCP lease time configuration?IP Services
  30. 130.A network engineer is configuring a router to connect a corporate network to the internet. The router needs to translate private IP addresses used within the corporate network to a single public IP address when communicating with external hosts. Which specific function is being configured on the router?Networking Fundamentals
  31. 131.A network technician is configuring a new router and wants to ensure that all generated log messages are sent to a remote Syslog server for centralized storage and analysis. Which UDP port must be opened on the Syslog server's firewall to receive these messages by default?IP Services
  32. 132.A network administrator is implementing a new wireless network that needs to support very high throughput, operate exclusively in the 5 GHz band to avoid congestion from older devices, and utilize advanced features like MU-MIMO (Multi-User Multiple-Input, Multiple-Output) for improved efficiency with multiple clients. Which Wi-Fi standard should be chosen?Networking Fundamentals
  33. 133.A network administrator is troubleshooting connectivity issues on a wired Ethernet network. They suspect a cable fault is causing intermittent connection drops. Which type of network cable is most commonly used for connecting a computer to a wall jack or a switch in a modern office environment?Networking Fundamentals
  34. 134.A user reports slow network performance and frequent disconnections on their laptop when connecting to the office Wi-Fi, especially during peak hours. The network administrator suspects interference from other wireless devices. Which of the following is most likely causing this issue?Networking Fundamentals
  35. 135.An IT manager is evaluating cloud service models for deploying a new customer relationship management (CRM) application. The team wants to retain full control over the operating system, middleware, and application runtime, but does not want to manage the underlying hardware, virtualization, or networking infrastructure. Which cloud service model would best fit these requirements?Networking Fundamentals
  36. 136.A network engineer is designing an IPv4 addressing scheme for a new subnet that needs to accommodate 100 host devices. Which of the following subnet masks would provide enough usable IP addresses for these hosts while minimizing wasted addresses?Networking Fundamentals
  37. 137.A network architect is designing a highly secure, private network connection between a company's on-premises data center and its resources hosted in a public cloud provider. This connection needs to ensure data encryption and maintain a consistent, dedicated bandwidth without traversing the public internet. Which type of network connection should be implemented?Networking Fundamentals
  38. 138.A network architect is designing an IPv6 addressing scheme for a global organization. The organization has several regional offices, each with multiple subnets. They need an addressing plan that supports a large number of subnets within each regional office and ensures unique, globally routable addresses. Which IPv6 address type is most suitable for this scenario?Networking Fundamentals
  39. 139.A company is evaluating cloud service models for hosting its custom-developed business applications. They want to maintain control over the operating system, runtime, and application configuration, but offload the management of the underlying hardware and virtualization infrastructure. Which cloud service model best fits these requirements?Networking Fundamentals
  40. 140.A network engineer is designing an IPv4 addressing scheme for a new branch office that needs to accommodate 200 hosts on a single subnet. The network will use a private IP address range. Which of the following subnet masks would be most appropriate and efficient for this requirement?Networking Fundamentals
  41. 141.A network engineer is configuring a new IPv6-enabled router. They need to assign a static IPv6 address to a server. The network prefix is 2001:0db8:abcd:0012::/64. The server's MAC address is 00:0C:29:1A:2B:3C. If EUI-64 is used to generate the interface identifier, what would be the full IPv6 address?Networking Fundamentals
  42. 142.A network administrator is designing a new wireless network for a large open-plan office. The goal is to provide high-speed connectivity with minimal interference, supporting many concurrent users. Which Wi-Fi standard is best suited for this environment, primarily operating in the 5 GHz band?Networking Fundamentals
  43. 143.A network administrator is designing an IPv4 addressing scheme for a small office network. The network needs to support 25 hosts, and the administrator wants to minimize the waste of IP addresses. Which of the following subnet masks would be MOST appropriate for this requirement?Networking Fundamentals
  44. 144.A network administrator needs to connect two buildings on a campus network with a secure, high-speed wired connection over a distance of 800 meters. There is significant electromagnetic interference (EMI) in the area. Which type of network cable is best suited for this scenario?Networking Fundamentals
  45. 145.A network technician is troubleshooting a client's workstation that cannot access network resources, including the internet and internal servers. Upon checking, the workstation has an IP address of 169.254.10.150. What is the most likely reason for this IP address assignment?Networking Fundamentals
  46. 146.A network technician is troubleshooting a client's workstation that is experiencing intermittent connectivity issues. The workstation is connected via an Ethernet cable to a wall jack. The technician suspects the cable might be faulty. Which type of cable is MOST commonly used for connecting a workstation to a wall jack in a modern office environment?Networking Fundamentals
  47. 147.A network technician is configuring a virtualized server environment. They need to allow virtual machines (VMs) on the same physical host to communicate with each other and also with the external physical network. Which virtual component facilitates this communication?Networking Fundamentals
  48. 148.A network technician is configuring a new router to connect a corporate network to the internet. The corporate network uses private IP addresses, and the router needs to translate these private addresses into a single public IP address for all outbound internet traffic. Which technology is required for this function?Networking Fundamentals
  49. 149.A network technician is troubleshooting slow wireless performance in a densely populated apartment building. They notice that many neighboring Wi-Fi networks are operating on the same 2.4 GHz channels. What is the most likely cause of the slow performance?Networking Fundamentals
  50. 150.A network administrator is designing a network topology for a new small office where all devices need to connect directly to a central device. If the central device fails, the entire network segment will go down. Which network topology is being described?Networking Fundamentals