{"id":14351,"date":"2026-09-17T04:45:55","date_gmt":"2026-09-17T04:45:55","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=14351"},"modified":"2026-09-17T04:45:55","modified_gmt":"2026-09-17T04:45:55","slug":"comptia-network-n10-009-practice-test-questions-and-exam-dumps-part1-q1-20","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/comptia-network-n10-009-practice-test-questions-and-exam-dumps-part1-q1-20\/","title":{"rendered":"CompTIA Network+ N10-009 Practice Test Questions and Exam Dumps Part1 Q1-20"},"content":{"rendered":"

<\/h1>\n

View Full <\/b>CompTIA N10-009 Exam Dumps<\/b><\/a> and Practice Test Dumps.<\/b><\/h2>\n

 <\/p>\n

Question 1<\/b><\/h3>\n

Which device forwards packets between different IP networks?<\/b><\/p>\n

    \n
  1. Switch<\/span><\/li>\n
  2. Hub<\/span><\/li>\n
  3. Router<\/span><\/li>\n
  4. Access point<\/span><\/li>\n<\/ol>\n

    Correct Answer: 3<\/b><\/p>\n

    Explanation<\/b><\/p>\n

    A router forwards packets between different IP networks by examining destination IP addresses and selecting an appropriate route. Routers maintain routing information and can use static routes or dynamic routing protocols to determine where traffic should go. A switch primarily forwards Ethernet frames within a local network, while a hub simply repeats signals to connected ports. An access point provides wireless connectivity and bridges wireless clients to a network. Therefore, the router is the device specifically designed to connect and route traffic between separate networks.<\/span><\/p>\n

    Question 2<\/b><\/h3>\n

    Which protocol automatically assigns IP addresses to network clients?<\/b><\/p>\n

      \n
    1. DHCP<\/span><\/li>\n
    2. DNS<\/span><\/li>\n
    3. FTP<\/span><\/li>\n
    4. SSH<\/span><\/li>\n<\/ol>\n

      Correct Answer: 1<\/b><\/p>\n

      Explanation<\/b><\/p>\n

      DHCP, or Dynamic Host Configuration Protocol, automatically provides network configuration information to clients. This can include an IP address, subnet mask, default gateway, and DNS server addresses. DHCP reduces manual configuration and helps prevent duplicate IP addresses caused by human error. DNS performs name resolution rather than assigning addresses, while FTP is used for file transfers and SSH provides secure remote access. DHCP commonly uses a lease system, allowing addresses to be assigned temporarily and renewed when needed.<\/span><\/p>\n

      Question 3<\/b><\/h3>\n

      A technician needs to identify the physical address of a device on a local IPv4 network. Which address is required?<\/b><\/p>\n

        \n
      1. Hostname<\/span><\/li>\n
      2. MAC address<\/span><\/li>\n
      3. URL<\/span><\/li>\n
      4. Port number<\/span><\/li>\n<\/ol>\n

        Correct Answer: 2<\/b><\/p>\n

        Explanation<\/b><\/p>\n

        A MAC address is the hardware address associated with a network interface and operates at the data link layer. On an Ethernet network, switches use MAC addresses to determine where frames should be forwarded. An IP address identifies a device logically at the network layer, while a hostname provides a human-readable identifier. A port number identifies an application or service rather than a physical network interface. Therefore, when identifying the physical address of a network interface, the MAC address is the appropriate value.<\/span><\/p>\n

        Question 4<\/b><\/h3>\n

        Which subnet mask provides 254 usable IPv4 host addresses in a typical subnet?<\/b><\/p>\n

          \n
        1. 255.255.255.128<\/span><\/li>\n
        2. 255.255.255.252<\/span><\/li>\n
        3. 255.255.255.192<\/span><\/li>\n
        4. 255.255.255.0<\/span><\/li>\n<\/ol>\n

          Correct Answer: 4<\/b><\/p>\n

          Explanation<\/b><\/p>\n

          The subnet mask 255.255.255.0 is equivalent to a \/24 network. It provides 256 total IPv4 addresses, with one address normally reserved for the network identifier and another for the broadcast address. This leaves 254 usable host addresses. A \/25 provides 126 usable hosts, a \/26 provides 62, and a \/30 provides only 2. Subnetting allows administrators to divide larger address spaces into smaller networks that better match organizational and technical requirements.<\/span><\/p>\n

          Question 5<\/b><\/h3>\n

          Which technology is commonly used to provide secure remote access to a private network over the internet?<\/b><\/p>\n

            \n
          1. VPN<\/span><\/li>\n
          2. VLAN<\/span><\/li>\n
          3. NAT<\/span><\/li>\n
          4. STP<\/span><\/li>\n<\/ol>\n

            Correct Answer: 1<\/b><\/p>\n

            Explanation<\/b><\/p>\n

            A VPN, or Virtual Private Network, creates a protected communication path across an untrusted network such as the public internet. Depending on the implementation, VPN technologies can provide encryption, authentication, and integrity protection for transmitted traffic. Remote-access VPNs allow users to securely connect to organizational resources from external locations. VLANs logically separate network segments, NAT translates addresses, and STP helps prevent switching loops. Therefore, a VPN is the technology most directly associated with secure remote network access.<\/span><\/p>\n

            Question 6<\/b><\/h3>\n

            Which wireless standard operates exclusively in the 5 GHz band?<\/b><\/p>\n

              \n
            1. 802.11b<\/span><\/li>\n
            2. 802.11g<\/span><\/li>\n
            3. 802.11a<\/span><\/li>\n
            4. 802.11n<\/span><\/li>\n<\/ol>\n

              Correct Answer: 3<\/b><\/p>\n

              Explanation<\/b><\/p>\n

              IEEE 802.11a operates in the 5 GHz wireless band and uses OFDM to provide higher throughput than older 2.4 GHz standards. The 802.11b and 802.11g standards operate in the 2.4 GHz band. 802.11n can operate in both 2.4 GHz and 5 GHz, depending on the implementation and configuration. The 5 GHz band generally offers more available channels and less interference from common household devices, although its shorter range can make coverage more challenging.<\/span><\/p>\n

              Question 7<\/b><\/h3>\n

              What is the primary purpose of DNS?<\/b><\/p>\n

                \n
              1. Encrypt web traffic<\/span><\/li>\n
              2. Translate domain names into IP addresses<\/span><\/li>\n
              3. Assign MAC addresses<\/span><\/li>\n
              4. Block unwanted network traffic<\/span><\/li>\n<\/ol>\n

                Correct Answer: 2<\/b><\/p>\n

                Explanation<\/b><\/p>\n

                DNS, or Domain Name System, translates human-readable names such as example.com into IP addresses that network devices can use to establish connections. This makes internet and network resources easier for users to access without requiring them to remember numerical addresses. DNS can also support other records, such as MX records for mail delivery and TXT records for various purposes. DNS does not inherently encrypt traffic, assign MAC addresses, or function as a firewall.<\/span><\/p>\n

                Question 8<\/b><\/h3>\n

                Which device primarily operates at Layer 2 of the OSI model?<\/b><\/p>\n

                  \n
                1. Router<\/span><\/li>\n
                2. Firewall<\/span><\/li>\n
                3. Switch<\/span><\/li>\n
                4. Load balancer<\/span><\/li>\n<\/ol>\n

                  Correct Answer: 3<\/b><\/p>\n

                  Explanation<\/b><\/p>\n

                  A traditional Ethernet switch primarily operates at Layer 2, the Data Link layer, where it forwards frames based on MAC addresses. Switches learn the MAC addresses associated with their ports and use that information to make forwarding decisions. Routers primarily operate at Layer 3 and forward packets using IP addresses. Firewalls and load balancers can operate across multiple layers depending on their capabilities. Therefore, among the listed devices, the switch is the standard Layer 2 networking device.<\/span><\/p>\n

                  Question 9<\/b><\/h3>\n

                  Which protocol is commonly used to securely manage a network device from a remote command line?<\/b><\/p>\n

                    \n
                  1. Telnet<\/span><\/li>\n
                  2. FTP<\/span><\/li>\n
                  3. SSH<\/span><\/li>\n
                  4. TFTP<\/span><\/li>\n<\/ol>\n

                    Correct Answer: 3<\/b><\/p>\n

                    Explanation<\/b><\/p>\n

                    SSH, or Secure Shell, provides encrypted remote command-line access to network devices and servers. It protects credentials and management traffic from being transmitted as plain text. SSH is therefore preferred over Telnet for secure administrative access. Telnet provides remote terminal access but does not encrypt the session. FTP is designed primarily for file transfers, while TFTP is a simpler file transfer protocol commonly used for specific network-management tasks. Secure management practices generally favor SSH when remote command-line access is required.<\/span><\/p>\n

                    Question 10<\/b><\/h3>\n

                    A network administrator wants to prevent switching loops in a Layer 2 network. Which technology should be configured?<\/b><\/p>\n

                      \n
                    1. NAT<\/span><\/li>\n
                    2. DHCP<\/span><\/li>\n
                    3. DNS<\/span><\/li>\n
                    4. STP<\/span><\/li>\n<\/ol>\n

                      Correct Answer: 4<\/b><\/p>\n

                      Explanation<\/b><\/p>\n

                      Spanning Tree Protocol, or STP, prevents Layer 2 switching loops by logically blocking redundant paths while maintaining them as alternatives. Without loop prevention, redundant Ethernet connections can cause broadcast storms, duplicate frames, and MAC-table instability. STP calculates a loop-free logical topology and can unblock a redundant path when the active path fails. NAT translates network addresses, DHCP assigns configuration information, and DNS resolves names. Therefore, STP is specifically designed to protect switched networks from Layer 2 loops.<\/span><\/p>\n

                      Question 11<\/b><\/h3>\n

                      Which IPv6 address type is used for communication with the nearest member of a group?<\/b><\/p>\n

                        \n
                      1. Anycast<\/span><\/li>\n
                      2. Multicast<\/span><\/li>\n
                      3. Broadcast<\/span><\/li>\n
                      4. Loopback<\/span><\/li>\n<\/ol>\n

                        Correct Answer: 1<\/b><\/p>\n

                        Explanation<\/b><\/p>\n

                        An IPv6 anycast address identifies a group of interfaces, with traffic delivered to the nearest interface according to the routing topology. Anycast can be useful for services that are deployed across multiple locations because clients can reach a nearby instance. IPv6 does not use broadcast in the same manner as IPv4; multicast is used for one-to-many communication. The IPv6 loopback address is used by a host to communicate with itself. Therefore, anycast is the appropriate address type for reaching the nearest member of a group.<\/span><\/p>\n

                        Question 12<\/b><\/h3>\n

                        Which command is commonly used to test basic IP connectivity to another host?<\/b><\/p>\n

                          \n
                        1. ipconfig<\/span><\/li>\n
                        2. ping<\/span><\/li>\n
                        3. nslookup<\/span><\/li>\n
                        4. arp<\/span><\/li>\n<\/ol>\n

                          Correct Answer: 2<\/b><\/p>\n

                          Explanation<\/b><\/p>\n

                          The ping command is commonly used to test whether a destination host is reachable over an IP network. It typically sends ICMP Echo Request messages and waits for Echo Reply messages. The results can provide information about basic connectivity and round-trip response time. ipconfig displays local IP configuration on supported systems, nslookup queries DNS information, and arp displays or manages local ARP information. Ping does not prove that every application or service is functioning, but it is a useful first connectivity test.<\/span><\/p>\n

                          Question 13<\/b><\/h3>\n

                          Which connector is commonly associated with twisted-pair Ethernet cabling?<\/b><\/p>\n

                            \n
                          1. LC<\/span><\/li>\n
                          2. SC<\/span><\/li>\n
                          3. RJ45<\/span><\/li>\n
                          4. BNC<\/span><\/li>\n<\/ol>\n

                            Correct Answer: 3<\/b><\/p>\n

                            Explanation<\/b><\/p>\n

                            RJ45 is the common modular connector used with twisted-pair Ethernet cabling such as Cat 5e, Cat 6, and Cat 6A. Ethernet implementations use standardized wiring arrangements, including T568A and T568B. LC and SC connectors are commonly associated with fiber-optic cabling, while BNC has historically been used with coaxial cable and certain networking technologies. Correct connector selection is important because the connector, cable type, and networking equipment must be compatible for a reliable physical connection.<\/span><\/p>\n

                            Question 14<\/b><\/h3>\n

                            What is the main purpose of a VLAN?<\/b><\/p>\n

                              \n
                            1. Increase internet bandwidth<\/span><\/li>\n
                            2. Encrypt wireless traffic<\/span><\/li>\n
                            3. Replace routing protocols<\/span><\/li>\n
                            4. Logically separate network segments<\/span><\/li>\n<\/ol>\n

                              Correct Answer: 4<\/b><\/p>\n

                              Explanation<\/b><\/p>\n

                              A VLAN, or Virtual Local Area Network, logically separates devices into different Layer 2 broadcast domains, even when those devices connect through the same physical switching infrastructure. VLANs can improve segmentation, organization, and security by separating groups such as employees, guests, servers, or voice devices. Communication between different VLANs generally requires Layer 3 routing. VLANs do not inherently increase internet bandwidth or encrypt traffic. Their primary purpose is logical network segmentation and control of broadcast domains.<\/span><\/p>\n

                              Question 15<\/b><\/h3>\n

                              Which network topology provides a dedicated connection between each endpoint and a central device?<\/b><\/p>\n

                                \n
                              1. Star<\/span><\/li>\n
                              2. Bus<\/span><\/li>\n
                              3. Ring<\/span><\/li>\n
                              4. Mesh<\/span><\/li>\n<\/ol>\n

                                Correct Answer: 1<\/b><\/p>\n

                                Explanation<\/b><\/p>\n

                                In a star topology, each endpoint has a dedicated physical connection to a central networking device, commonly a switch. This design is widely used in modern Ethernet networks because individual cable failures typically affect only the connected device rather than the entire network. A bus topology uses a shared backbone, while a ring connects devices in a circular arrangement. A mesh topology provides multiple interconnections between devices for redundancy. Star topology offers practical installation, troubleshooting, and scalability advantages in many LAN environments.<\/span><\/p>\n

                                Question 16<\/b><\/h3>\n

                                A technician observes that a network interface has received many corrupted Ethernet frames. Which metric is most relevant?<\/b><\/p>\n

                                  \n
                                1. CPU utilization<\/span><\/li>\n
                                2. CRC errors<\/span><\/li>\n
                                3. DNS records<\/span><\/li>\n
                                4. DHCP leases<\/span><\/li>\n<\/ol>\n

                                  Correct Answer: 2<\/b><\/p>\n

                                  Explanation<\/b><\/p>\n

                                  CRC errors indicate that received Ethernet frames failed a cyclic redundancy check, suggesting that the frame data was corrupted during transmission. A high number of CRC errors can be associated with damaged cables, electromagnetic interference, faulty network interfaces, duplex mismatches, or other physical and data-link problems. CPU utilization measures processor activity, DNS records contain name-resolution information, and DHCP leases describe assigned network configurations. Checking interface error counters is therefore an important troubleshooting step when corrupted frames are suspected.<\/span><\/p>\n

                                  Question 17<\/b><\/h3>\n

                                  Which protocol is primarily responsible for synchronizing clocks across network devices?<\/b><\/p>\n

                                    \n
                                  1. NTP<\/span><\/li>\n
                                  2. SMTP<\/span><\/li>\n
                                  3. SNMP<\/span><\/li>\n
                                  4. SMB<\/span><\/li>\n<\/ol>\n

                                    Correct Answer: 1<\/b><\/p>\n

                                    Explanation<\/b><\/p>\n

                                    Network Time Protocol, or NTP, synchronizes system clocks across networked devices. Accurate time is important for authentication, logging, troubleshooting, certificates, event correlation, and security monitoring. If devices have significantly different timestamps, administrators may have difficulty reconstructing the sequence of network events. SMTP is used for email transmission, SNMP is used for monitoring and managing network devices, and SMB supports file and resource sharing. NTP therefore provides the time-synchronization function required by distributed network systems.<\/span><\/p>\n

                                    Question 18<\/b><\/h3>\n

                                    Which technology allows multiple internal hosts to share a single public IPv4 address?<\/b><\/p>\n

                                      \n
                                    1. VLAN<\/span><\/li>\n
                                    2. PAT<\/span><\/li>\n
                                    3. STP<\/span><\/li>\n
                                    4. QoS<\/span><\/li>\n<\/ol>\n

                                      Correct Answer: 2<\/b><\/p>\n

                                      Explanation<\/b><\/p>\n

                                      Port Address Translation, or PAT, allows multiple internal devices to share a single public IPv4 address by using different source port numbers to track individual connections. PAT is commonly implemented as part of NAT on internet gateways and helps conserve limited public IPv4 address space. VLANs provide logical segmentation, STP prevents Layer 2 loops, and QoS manages traffic priorities and resource allocation. PAT is particularly useful in networks where many private-addressed devices need simultaneous access to public internet services.<\/span><\/p>\n

                                      Question 19<\/b><\/h3>\n

                                      Which security technology can detect and block malicious network traffic based on predefined rules or signatures?<\/b><\/p>\n

                                        \n
                                      1. DNS resolver<\/span><\/li>\n
                                      2. Load balancer<\/span><\/li>\n
                                      3. IDS\/IPS<\/span><\/li>\n
                                      4. DHCP server<\/span><\/li>\n<\/ol>\n

                                        Correct Answer: 3<\/b><\/p>\n

                                        Explanation<\/b><\/p>\n

                                        An intrusion detection and prevention system, or IDS\/IPS, analyzes network traffic for suspicious or malicious activity. An IDS primarily detects and alerts on potential threats, while an IPS can actively block or prevent traffic identified as malicious. Depending on the implementation, these systems can use signatures, behavioral analysis, protocol inspection, and other techniques. A DNS resolver handles name resolution, a load balancer distributes application traffic, and a DHCP server provides network configuration. Therefore, IDS\/IPS technology is directly associated with network threat detection and prevention.<\/span><\/p>\n

                                        Question 20<\/b><\/h3>\n

                                        Which routing method requires an administrator to manually configure the route?<\/b><\/p>\n

                                          \n
                                        1. Static routing<\/span><\/li>\n
                                        2. OSPF<\/span><\/li>\n
                                        3. BGP<\/span><\/li>\n
                                        4. RIP<\/span><\/li>\n<\/ol>\n

                                          Correct Answer: 1<\/b><\/p>\n

                                          Explanation<\/b><\/p>\n

                                          Static routing requires an administrator to manually define the destination network, next hop, interface, or other routing information. It can be useful for simple networks, specific paths, default routes, or situations where predictable routing is desired. Dynamic routing protocols such as OSPF, BGP, and RIP can learn and exchange routing information automatically according to their respective algorithms and configurations. Static routes do not automatically adapt to topology changes, so administrators must modify them when network requirements or paths change.<\/span><\/p>\n

                                           <\/p>\n","protected":false},"excerpt":{"rendered":"

                                          View Full CompTIA N10-009 Exam Dumps and Practice Test Dumps.   Question 1 Which device forwards packets between different IP networks? Switch Hub Router Access point Correct Answer: 3 Explanation A router forwards packets between different IP networks by examining destination IP addresses and selecting an appropriate route. Routers maintain routing information and can use […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/14351"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=14351"}],"version-history":[{"count":1,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/14351\/revisions"}],"predecessor-version":[{"id":14396,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/14351\/revisions\/14396"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=14351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=14351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=14351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}