CCNA Introduction to Networks (ITN) Practice Test

These questions are part of the practice quiz. Start practicing

• Which two network addresses can be assigned to a network containing 10 hosts, within the 10.18.10.0/24 range? (Choose two.)
• What is a function of NAT in IPv4 networks?
• A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in the ARP cache. How will the device obtain a destination MAC address?
• What information does the show startup-config command display?
• A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?
• Which wireless technology is known for its low-power and low-data rate requirements, making it popular in IoT environments?
• What is the impact of an incorrectly configured default gateway on a host?
• What is the default administrative distance for OSPF?
• What is required for a switch to communicate with devices on different networks?
• At which layer of the OSI model does the function of flow control primarily occur?
• What does a router do to prevent an IPv4 packet from traveling endlessly on a network?
• A client's packet is received by a server with a destination port number of 69. Which service is being requested?
• In which layer of the OSI model does the Transmission Control Protocol (TCP) operate?
• During which phase of the data encapsulation process does the transport layer add a header to the data?
• Which two traffic types commonly use the Real-Time Transport Protocol (RTP)?
• What device is used to connect multiple network segments?
• What is a common functionality of the ping command in Windows?
• What are two effective ways to defend against malware? (Choose two.)
• Which two ICMPv6 messages are not present in ICMP for IPv4? (Choose two.)
• Based on the traceroute output, how many hops were made to reach the device at 192.168.100.1?
• Which layer of the OSI model is responsible for establishing, maintaining, and terminating a connection between applications?
• What happens when a host generates an ARP broadcast?
• Which layer of the TCP/IP model is responsible for providing a route to forward messages through an internetwork?
• What service is provided by POP3?
• What service is provided by HTTP?
• What component does the Read-Only access permission in a file server's folder exemplify in the AAA framework?
• What are the Layer 2 and Layer 3 addresses that are transmitted from host B to the router when sending a packet to host D?
• What type of network configuration allows for devices to communicate over multiple networks?
• What happens when a router is configured with the ipv6 unicast-routing global command?
• Which protocol is primarily used for secure remote login to network devices?
• What attribute of a NIC would place it at the data link layer of the OSI model?
• Which value in an IPv4 header is decremented with each router that receives the packet?
• What technique is used with UTP cable to help protect against interference?
• Which statements accurately describe advantages or disadvantages of deploying NAT for IPv4? (Choose two.)
• What is the consequence of configuring a router with the ipv6 unicast-routing command?
• What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?
• A network administrator wants to use the same subnet mask for three subnetworks with given numbers of devices. Which subnet mask would be appropriate?
• Which type of malware could disable a local software firewall through a spreadsheet add-on?
• What is the primary benefit of using a store-and-forward switching method?
• Which of the following is an advantage of fiber optic cabling compared to copper cabling?
• Which layer of the OSI model is responsible for end-to-end communication?
• Which protocol provides dynamic IP address allocation to devices on a network?
• Which encryption protocol is commonly used for securing internet traffic?
• In the context of data transmission, what role does the source port field serve in TCP or UDP?
• What must an administrator do before issuing configuration commands on a switch?
• What is the smallest network mask that supports 61 connected devices?
• What three requirements are necessary for protocols used in network communications?
• What is the purpose of the TCP sliding window mechanism?
• A disgruntled employee is using free wireless networking tools to gather information about enterprise wireless networks. What type of attack is this?
• What advantage does using a protocol defined by an open standard provide?
• What will the destination address be in the frame when it leaves host A?
• Which tool would a technician use to trace the path that a packet takes through a network?
• What is a characteristic of a protocol defined by an open standard compared to proprietary protocols?
• Which protocol is used for secure file transfer over a network?
• What does the acronym NVRAM stand for?
• A host needs to send a packet to a device on a remote LAN but has no ARP cache mappings. How will it obtain the necessary destination MAC address?
• How are UDP segments transported across the network?
• What is a potential consequence of using unmanaged switches in a network?
• What is the smallest network mask that can support 200 connected devices?
• What is the result of entering the command transport input ssh on the switch vty lines?
• Which connector is used with twisted-pair cabling in an Ethernet LAN?
• Which protocol is used to resolve IP addresses to MAC addresses in a local area network?
• Which characteristic describes a virus?
• What characteristic describes a VPN?
• Which of the following is a feature of a directly connected interface in an IPv4 routing table?
• What is the primary purpose of a router in a network?
• Which field is created by a source node to ensure the integrity of a transmitted data signal?
• Which of the following is NOT a function of the IPv6 unicast-routing command?
• How does a switch differ from a hub in a network?
• What two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
• What protocol is responsible for translating domain names into IP addresses?
• What are two problems caused by a large number of ARP request and reply messages?
• Which additional steps must be taken after defining a local user account for SSH on a router? (Choose three.)
• Why would a Layer 2 switch need an IP address?
• Which device interface IP address should be used as the default gateway setting of host H1?
• A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?
• How does the service password-encryption command enhance password security on Cisco devices?
• What is the definition of proprietary protocols?
• What characteristic describes identity theft?
• Which three layers of the OSI model correspond to the application layer of the TCP/IP model?
• Which protocol is primarily used for name resolution on the internet?
• Which layer of the TCP/IP model corresponds with the function of determining the next hop in a path?
• What characteristic best describes adware?
• Which network devices will receive the ARP request sent by Host A in a default switch configuration?
• Which function does the transport layer perform in networking?
• What is the primary function of a switch in a network?
• What are two primary responsibilities of the Ethernet MAC sublayer? (Choose two.)
• Which of the following is a primary benefit of using a Virtual Private Network (VPN)?
• Which of these commands is used to configure virtual terminal lines on a router?
• Which of the following layers of the OSI model is responsible for identifying the network address?
• What response should be expected from a server after it receives a DNS query?
• In a network with QoS implemented, which of the following data types has the highest priority?
• In which layer of the OSI model does TCP operate?
• When monitoring network performance, what key indicator is essential to establish adjustments?
• What is the subnet ID for the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
• Which two functions are carried out at the MAC sublayer of the OSI Data Link Layer?
• What is a primary consideration when implementing fiber optic cabling in comparison to copper cabling?
• A network administrator is adding a new LAN to a branch office that needs to support 4 connected devices. What is the smallest network mask they can use?
• In a network using the address block of 128.107.0.0/16, what is the subnet mask that provides the maximum number of equal size subnets?
• In a network communication context, what is the primary role of the Transport layer?
• What command can be used on a Windows PC to see the IP configuration of that computer?
• What is an advantage for small organizations of adopting IMAP instead of POP?
• What does EUI-64 allow a device to generate in IPv6 networking?
• What is the primary function of DNS in a networking environment?
• What is the effect of the command ip default-gateway 172.16.100.1 applied to a switch?
• What are two features of the Address Resolution Protocol (ARP)?
• Which of the following is considered a network layer protocol?
• In the context of addressing, what does "host address" refer to?
• A client packet is received by a server with a destination port number of 110. What service is the client requesting?
• Which protocol is commonly used for delivering emails?
• What is the main purpose of network segmentation?
• A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)
• What is the main purpose of using CIDR (Classless Inter-Domain Routing)?
• Which protocol is primarily used for secure file transmission over the internet?
• Which process allows devices on a network to sense a collision before attempting to transmit data?
• Which command is used to check the configuration of a switch?
• In terms of frames, what role does the control field play in data transmission?
• Which of the following is a function of the session layer in the OSI model?
• Which layer of the TCP/IP model primarily deals with data formatting and presentation?
• What purpose does subnetting serve in a network?
• What distinguishes the data link layer in network communication?
• An organization is assigned an IPv6 address block of 2001:db8:0:ca00::/56. How many subnets can be created without using bits in the interface ID space?
• What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 using the EUI-64 process?
• What will R1 do with the Ethernet frame header after PC1 sends a packet to PC2?
• If the company uses subnet zero as the first subnet, what configuration should be used for a workgroup server in the fifth subnet of a network with a /29 prefix?
• Which type of network characteristic ensures that a system can continue to operate despite a failure of one of its components?
• What is the function of DHCP in a network?
• What two ICMPv6 message types must be allowed through IPv6 access control lists to enable resolution of Layer 3 addresses to Layer 2 MAC addresses? (Choose two.)
• What service is provided by HTTPS?
• Which three factors should be considered when designing a wireless network? (Choose three)
• What could be the consequence of having an improper cable installation in a network?
• What is the fastest way for a network administrator to test whether a banner message is properly configured on a Cisco device?
• What is a defining characteristic of a Trojan horse?
• What must a client using SLAAC do after the IPv6 address has been generated?
• A client packet is received by a server with a destination port number of 67. What service is the client requesting?
• Which three network characteristics are described in the scenario involving an employee logging into a company remotely?
• Which three Windows CLI commands and utilities can a technician use to verify PC connectivity to local and Internet resources?
• What is the primary function of ICMPv6 Neighbor Solicitation messages in an IPv6 network?
• Which wireless technology is popular for home automation applications due to low-power and data rate requirements?
• How many total host addresses are unused across all four subnets with the network address 192.168.99.0 and a subnet mask of 255.255.255.192?
• When configuring subnets, what is the significance of the subnet mask?
• What service does DNS provide?
• When the user-defined error threshold on a per-port basis is reached, which switching method does the switch revert to?
• When Host A sends an ARP request without knowing its default gateway's MAC address, which hosts will receive the request?
• What is the primary service provided by BOOTP?
• What may cause corruption and distortion in newly installed Ethernet cabling?
• What is one primary function of the data link layer?
• Which type of address is represented by the prefix 2001:0db8::/32 in IPv6?
• Which switching method drops frames that fail the FCS check?
• What does NAT (Network Address Translation) primarily accomplish in a network?
• What layer of the OSI model does the transport layer correspond to?
• What does the Layer 1 status in the 'show ip interface brief' output indicate?
• What two security solutions are most likely to be used only in a corporate environment? (Select two)
• Which two statements are true about features of an IPv4 routing table on a router? (Choose two)
• Which server type utilizes record types such as A, NS, AAAA, and MX?
• Which three components make up an IPv6 global unicast address?
• Which layer of the OSI model does the Ethernet MAC sublayer operate in?
• What method is used to manage contention-based access on a wireless network?
• Which characteristic describes antispyware?
• What are two common causes of signal degradation when using UTP cabling?
• At what point would a router stop forwarding the packet during a tracert?
• What layer of the OSI model is responsible for establishing, managing, and terminating sessions between applications?
• What is the main purpose of a MAC address?
• What is a common characteristic shared by both TCP and UDP?
• In a Class C network, what is the maximum number of usable host addresses per subnet?
• What type of IP addressing allows multiple devices to share the same IP address?
• In a network, which device performs the function of forwarding data packets to other networks?
• A client packet that specifies a destination port of 53 is requesting which service?
• Which layer of the OSI model is responsible for logical addressing?
• After an ARP request is made by PC1 to reach PC2, what is the expected response?
• What will a router do immediately after matching the destination IP address to a network in its routing table?
• What factor should network engineers check to assess the reported delays in authentication and resource access?
• What is a common problem associated with untwisted Ethernet cabling?
• If Host1 transfers a file to the server, which layers of the TCP/IP model are utilized?
• What does the UDP destination port number indicate?
• What device is commonly used to connect multiple networks and forward packets between them?
• Which data link layer operation ensures that frames are delivered without errors?
• Which component of a network changes the broadcast domain?
• What is the primary function of a firewall in a network?
• Which subnet includes the address 192.168.1.96 as a usable host address?
• What characteristic describes spyware?
• Which command shows the current configured IP addresses and subnet masks on a router or switch?
• What is one of the steps required for configuring SSH on a router to ensure only encrypted connections are accepted?
• Which software utility can a technician use to diagnose a problem when the IP address of a web server is reachable, but the URL is not?
• Which addressing method can be used to identify a specific interface on a device?
• What does a firewall primarily do in a network?
• Which protocol operates at the Transport layer of the OSI model?
• What is the lowest priority among the following data types when QoS is implemented?
• An IPv6 enabled device sends a data packet addressed to FF02::2. What does this address target?
• Which two methods can be used to assess traffic flow patterns and network traffic types?
• What characteristic of IP indicates it does not require a dedicated end-to-end connection?
• What service is provided by Internet Messenger?
• Which two commands can be used on a Windows host to display the routing table? (Choose two.)
• What does the term "attenuation" refer to in data communication?
• What is the function of a router in a network?
• Which two statements are correct regarding similarities and differences between IPv4 and IPv6 packet headers? (Choose two.)
• What type of malware might be introduced to the network when an employee downloads unverified software?
• A user sends an HTTP request to a web server on a remote network. During encapsulation for this request, what information is added to the address field of a frame to indicate the destination?
• Which protocol uses the concept of maintaining a connection for reliable data transmission?
• What does the acronym DHCP stand for?
• What subnet mask would make the most efficient use of available addresses for a site with 22 IP phones, 20 PCs, 2 printers, and 2 scanners?
• What two pieces of information does the 'show ip interface brief' command display?
• Which protocol is used primarily for email transmission?
• A wired laser printer is attached to a home computer. What networking model is in use?
• What is a function of a router in a network?
• What is the smallest network mask that can support 25 connected devices in a new LAN?
• A technician with a PC is using multiple applications while connected to the Internet. How is the PC able to keep track of the data flow between multiple application sessions and have each application receive the correct packet flows?
• A client packet is received by a server with a destination port number of 21. What service is being requested?
• Which protocol is responsible for building the ARP table used in a network?
• Which characteristic describes the CSMA/CD process?
• What does CSMA/CD stand for, and what is its primary purpose?
• Which range of addresses is designated for link-local addresses in IPv6?