Network Essential Version C (LE) Practice Test

These questions are part of the practice quiz. Start practicing

• Which DHCP message is used by a client to initiate a search for a DHCP server?
• Which statement best describes ARP behavior when there is no mapping in the cache?
• Which statement about a MAC address is true?
• Among common wireless security protocols, which is considered the strongest?
• If the default gateway is configured incorrectly on a host, what is the impact on communications?
• Which protocol assigns IPv4 addresses dynamically on a LAN?
• In IPv6 addressing, with a /64 prefix, which portion identifies the network?
• Which of the following statements about the OSI-model layering is true?
• Which definition matches spyware?
• Which MAC address is used as the destination when a DHCP client broadcasts a discovery message on a LAN?
• In routing, what does the next-hop detail in a routing table indicate?
• Which wireless RF band do IEEE 802.11b/g devices use?
• DHCP on a LAN is responsible for
• Which statement best describes the role of DNS?
• What command would you use to test reachability of the default gateway from a PC?
• What technology converts analog voice signals into digital data?
• What should the technician do when root cause cannot be identified after troubleshooting a customer problem?
• What is the primary purpose of Transmission Control Protocol (TCP)?
• What is NAT overload (PAT) and how does it work?
• Why is QoS stands for and why is it important?
• Which statement describes a possible use of multicast in networks?
• What term describes the '0/1' portion in the command Interface FastEthernet 0/1?
• In IPv4 addressing, a subnet mask helps determine whether two hosts reside on the same local network.
• Which information is typically shown by the show ip interface brief command?
• Define a broadcast domain and explain how VLANs affect it.
• What is VLAN trunking and what does 802.1Q accomplish?
• Which device typically performs NAT in a home or small office network?
• Why is the ARP cache important, and how is its lifetime determined?
• Which statement is true about directly connected routes in a routing table?
• Which command shows the routing table entries including directly connected networks?
• In networks using 802.1X, what must occur before a device is allowed to access the network?
• In software-defined networking architecture, what function is removed from network devices and performed by an SDN controller?
• What is the primary purpose of the default SVI on a switch?
• Which test would determine if the PC can reach its default gateway?
• A layered network model provides which of the following benefits?
• What is a collision domain and how do switches affect it?
• Which command configures a name on the router?
• Why is IPv4 subnetting used, and what is a subnet mask?
• An intruder tries a large number of possibilities in rapid succession to guess a password, causing other users to be locked out. What type of attack is this?
• What kind of address does a switch examine to populate its MAC address table?
• In the router prompt mapping, what task does RouterA(config-line)# correspond to?
• What is the purpose of 802.1X in network access control?
• What is NAT primarily used for?
• Which description correctly matches DNS record types A, AAAA, and CNAME?
• Why is DNS caching beneficial for performance?
• Which IP address range is reserved for multicast on a local network?
• Which command configures the console password on a Cisco router?
• Which action is required to complete SSH configuration by domain name for host?
• Differentiate passive monitoring from active monitoring of a network.
• Which wireless technology enables contactless payments by bringing a device near a reader?
• DNS caching speeds up name resolution by storing recent results where?
• Which statement describes an advantage of using standards to develop protocols?
• What is Spanning Tree Protocol (STP) used for?
• How does IPv6 address compression work and why is it useful?
• In the given DHCP pool scenario, three printers require reserved static IP addresses from the pool. How many IP addresses remain for other hosts?
• If a host needs to reach a host on a remote network and the ARP cache has no mapping entries, to what destination address will the host send an ARP request?
• Which DNS record maps a hostname to an IPv6 address?
• How does NAT overload multiplex connections from multiple private addresses onto a single public IP?
• Which device is typically responsible for assigning IP addresses dynamically to hosts on a network?
• Which IP SLA metric can be measured by probes?
• What problem does Network Address Translation (NAT) solve?
• Which information does the routing table primarily provide?
• Which statement about UDP in the TCP/IP protocol suite is true?
• What does Address Resolution Protocol (ARP) do on a local network?
• In which NAT scenario does a wireless router translate addresses when a host sends packets to the ISP to access the Internet?
• Which command is used to enter the console line configuration mode on a Cisco router?
• Which frequency band is associated with 802.11b/g wireless devices?
• In the router prompt mapping, what task does RouterA(config-if)# correspond to?
• Which device is an end device?
• Which layer does a router primarily operate on?
• Which statement describes a VPN site-to-site link?
• In the router prompt mapping, what task does RouterA(config)# correspond to?
• What is a DMZ and why is it used in network design?
• Provide an example of an IPv4 subnet mask and its prefix length.
• What is the primary purpose of a subnet mask in IPv4 addressing?
• RFC stands for what in networking and why is it important?
• Which command determines the interface a router will use to reach remote networks?
• What is split tunneling in VPNs?
• Which address is the broadcast address for the 192.168.10.0/24 subnet?
• Which network device primarily segments collision domains?
• In the given router prompt-to-task mapping, what task does RouterA# indicate?
• Which statement best describes how a switch can be remotely managed?
• What is the primary purpose of a DHCP address pool?
• Using default settings, what is the next step in the switch boot sequence after the IOS loads from flash?
• What is an inherent security vulnerability of SSID broadcasting?
• A DHCP server is configured with the address pool 192.168.10.0/24. How many IP addresses are usable in this pool?
• Which command moves you from privileged EXEC mode into global configuration mode?
• On a Layer 2 switch, enabling management access typically requires?
• A network device focuses on interconnecting independent local networks. At which layer of devices does this technology reside?
• Which description matches the DHCPOFFER message?
• To complete SSH configuration on a router, which action is required to enable SSH by generating cryptographic keys?
• Which device is an end device?
• Which type of device filtering can be enabled on some wireless access points or wireless routers?
• Which action creates the local credentials used for SSH authentication?
• In which NAT scenario does a wireless router translate addresses when a host communicates with a remote site owned by the device manufacturer for a manual?
• What is a key difference between TCP and UDP?
• Which notation is used to represent consecutive zero blocks in an IPv6 address?
• A newly purchased client laptop connects to a network using dynamic addressing. Which IP address does the laptop use as the destination address when requesting a dynamically assigned address?
• Which statement best describes how a switch differs from a hub in a local Ethernet network?
• What is the primary purpose of using VLANs in a network?
• Which command displays a message when the router is accessed?
• What is the effect of setting the security mode to WEP on a small wireless router?
• DNS typically uses which transport protocol(s)?
• A client on a network with a DHCP server at 192.168.1.1 will obtain a usable IP address by sending which message to which destination?
• What is a DNS zone?
• Which DHCP message is defined as the server’s response to a client’s initial request?
• If an interface shows Status down and Protocol down in show ip interface brief, what is a likely cause?
• At which OSI layer would a logical address be added during encapsulation?
• What is a characteristic of a peer-to-peer application?
• Which statement correctly describes the scope of link-local IPv6 addresses (fe80::/64)?
• What is a MAC address and how is it typically formatted?
• What is the role of Domain Name System (DNS) in networking?
• Which statement about subnet boundaries is true?
• What is a DHCP scope?
• Which statement about multicast addressing is true?
• What does 802.1Q tagging accomplish in VLAN trunking?
• In the show ip interface brief output, what does an 'up' Status and 'up' Protocol indicate?
• Which description matches the DHCPDISCOVER message?
• Which protocol automatically configures hosts with IP addresses?
• Which statement about the transport input ssh setting on VTY lines is true?
• Which statement best describes a management interface on a switch?
• Which factor does not influence throughput?
• What device is required to establish a home wireless network and provide access to the Internet for multiple devices?
• Which OSI layer provides end-to-end delivery with flow control and error detection?
• What step follows IOS loading from flash during a switch boot with default settings?
• If a destination host is on the same LAN, how will the packet be sent?
• Pop-ups are best described as what?
• What is a loopback address and how is it used?
• Why are VLANs used in modern networks?
• What is VLAN hopping and how can it be prevented?
• Which DHCP message does the client send when it accepts the IP address provided by the server?
• Which statement best describes the function of the banner MOTD command?
• Which characteristic uniquely describes an SSH connection to a switch?
• What is the role of a default gateway in a subnet?
• Name common wireless security protocols and their relative security levels.
• What is a MAC address table and how does a switch populate it?
• Where would a network administrator find configuration information such as computer names and IP addresses used?
• Which statement describes data transmission at the transport layer?
• What is the purpose of the subnet mask in conjunction with an IP address?
• During the boot process, which file is loaded into RAM to provide the operating system image?
• Which type of access is secured on a Cisco router or switch with the enable secret command?
• Which address does a switch use to build the MAC address table?
• Which task is performed in the config-if mode on Cisco devices?
• How does a switch learn which MAC addresses are reachable on which ports?
• If the default gateway is configured incorrectly on a host, what is the impact?
• After receiving a DHCPOFFER, which DHCP message does the client send to select the offered IP address?
• Which protocol is commonly used by email clients to retrieve messages from a server?
• Which protocol provides remote access to servers?
• In the TCP/IP model, which layer provides an addressing scheme to transmit data between devices?
• Which feature is unique to TCP compared to UDP?
• What is the primary purpose of a VPN?
• What is a default route and when is it used?
• Which protocol is used to send email from a client to a mail server?
• Which service uses UDP/TCP port 53?
• Which function does DNS serve?
• In an IPv4 /24 subnet, what is the network address for 192.168.10.0/24?
• What is the purpose of a traceroute utility?
• How do IPv4 and IPv6 header sizes compare?
• Disabling SSID Broadcast primarily provides what security effect?
• What networking trend allows multiple operating systems to run on a single physical server to provide isolated services for different customers?
• Which device uses a MAC address table to forward frames efficiently?
• Which solution allows external users to access only an internal FTP server on a private network?
• Which device is commonly used to share Internet access across multiple devices in a home environment?
• Which statement correctly describes the primary difference between routers and switches in a network design?
• Which command would you use to verify end-to-end reachability to a specific host?
• Which protocol provides best-effort, connectionless delivery with minimal overhead?
• Which DHCP message is the server using to respond to the client’s initial request by offering an IP address?
• Which statement correctly describes the DHCPOFFER in the DHCP process?
• In a data center that uses virtualization to host multiple operating systems on one server, what is a key benefit for resource utilization?
• How can you distinguish attenuation from amplification in cabling systems?
• Which of the following best describes the core security responsibilities of a network administrator?
• Distinguish between private and public IPv4 addresses.
• Which question would help determine if a host is obtaining IP addresses via DHCP?
• What should be checked first when some workstations cannot get a valid IP address after moving offices?
• What is SNMP and what is it used to monitor?
• What network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 infrastructures?
• Which TCP/IP feature describes retransmitting data when an acknowledgment is not received within a set period?
• What is the function of a link-local IPv6 address (fe80::/64)?
• From which storage medium is the IOS image typically loaded during boot?
• Which statement is true regarding IP addressing and internet connectivity?
• To prevent neighbors from discovering a wireless network, what action should you take?
• Which command can you use to verify the path a packet would take to a remote network?
• What is IP SLA and what is it used for?
• What does the IP Address column reflect in show ip interface brief?
• Where is the startup-config file located during switch operation?
• Which DHCP message type confirms that the address lease has been accepted by the server?
• A switch in a local Ethernet network forwards frames based on which criterion?
• Which of the following is NOT one of the three attacks that exploit human behavior?
• What is the purpose of a firewall in a network?
• Which statement best describes the difference between stateful and stateless firewalls?