N10-009 Practice Test 25 — 15 Questions

Question 1

A network administrator needs to document the network for auditing purposes. Which type of documentation provides the most detailed information about the physical connections between devices, including cable types and patch panel ports?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Wiring schematic. A wiring schematic provides the most detailed information about physical connections, including cable types, patch panel ports, and exact pin-to-pin wiring. This level of detail is essential for auditing physical infrastructure, as it documents the actual cabling plant rather than logical or high-level connectivity.

Answer

Logical diagram

Answer

Network topology map

Answer

Asset management database

Question 2

Drag and drop the steps to configure a VLAN on a managed switch into the correct order.

Accepted Answer

Access the switch and enter privileged EXEC mode, then enter global configuration mode, then create the VLAN, then assign interfaces to the VLAN.. VLAN creation involves entering config mode, creating the VLAN, and assigning ports.

Answer

Access the switch and enter privileged EXEC mode, then create the VLAN, then enter global configuration mode, then assign interfaces to the VLAN.

Answer

Enter global configuration mode, then access the switch and enter privileged EXEC mode, then create the VLAN, then assign interfaces to the VLAN.

Answer

Access the switch and enter privileged EXEC mode, then enter global configuration mode, then assign interfaces to the VLAN, then create the VLAN.

Question 3

A network administrator needs to ensure that all changes to network devices are properly reviewed, approved, and tracked. Which process should the administrator implement?

Accepted Answer

Change management. Change management is the formal process for requesting, reviewing, approving, implementing, and documenting changes to network devices. It ensures that all modifications are authorized, tracked, and have a rollback plan, which directly meets the requirement for review, approval, and tracking.

Answer

Incident management

Answer

Problem management

Answer

Asset management

Question 4

Drag and drop the steps for the TCP three-way handshake into the correct order.

Accepted Answer

Step 1: Send SYN, Step 2: Receive SYN-ACK, Step 3: Send ACK. The TCP three-way handshake is a fundamental process for establishing a connection. It begins with the client sending a SYN packet to the server. The server responds with a SYN-ACK packet, acknowledging the client's SYN and sending its own SYN. Finally, the client sends an ACK packet to acknowledge the server's SYN, completing the handshake. This sequence ensures both sides agree on initial sequence numbers and are ready to communicate.

Answer

Step 1: Send SYN, Step 2: Send ACK, Step 3: Receive SYN-ACK

Answer

Step 1: Send SYN-ACK, Step 2: Receive SYN, Step 3: Send ACK

Answer

Step 1: Send ACK, Step 2: Send SYN, Step 3: Receive SYN-ACK

Question 5

A network administrator needs to connect two switches that are 80 meters apart using UTP cabling and achieve 1 Gbps speed. The administrator has Cat5e and Cat6 cables available. Which standard should be used?

Accepted Answer

1000BASE-T. 1000BASE-T (IEEE 802.3ab) is the correct standard because it supports 1 Gbps over Cat5e or Cat6 UTP cabling at distances up to 100 meters. With 80 meters between switches, both cable types are well within the 100-meter reach, and 1000BASE-T is designed specifically for twisted-pair copper at this speed.

Answer

1000BASE-LX

Answer

10GBASE-T

Answer

100BASE-TX

Question 6

Drag and drop the steps for a disaster recovery procedure after a server failure into the correct order.

Accepted Answer

Assess damage, then rebuild server, then restore from backup, then apply patches, then test functionality. The correct disaster recovery order begins with assessing the damage to understand the scope of the failure. Next, rebuild the server (hardware/OS), then restore data from backup. After restoration, apply any necessary patches to bring the system up to date, and finally test functionality to confirm successful recovery. This sequence ensures data integrity and minimizes downtime.

Answer

Assess damage, then restore from backup, then rebuild server, then apply patches, then test functionality

Answer

Restore from backup, then rebuild server, then test functionality, then apply patches, then assess damage

Answer

Test functionality, then assess damage, then restore from backup, then apply patches, then rebuild server

Question 7

Match each network service to its description.

Accepted Answer

DHCP: Automatically assigns IP addresses to devices on a network.. Common network services have specific functions: DHCP assigns IP addresses, DNS resolves names, HTTP serves web content, SMTP handles email, FTP transfers files, and SNMP manages networks. The distractors confuse these roles.

Answer

FTP: Protocol for sending email.

Answer

SNMP: Resolves domain names to IP addresses.

Question 8

Match each network protocol to its well-known port number.

Accepted Answer

HTTP: 80. Common well-known ports: HTTP=80, HTTPS=443, FTP=21, SSH=22. The distractors swap these assignments.

Answer

HTTP: 443

Answer

FTP: 22

Question 9

A small office uses a wireless router that provides both wired and wireless connectivity. The router's LAN IP is 192.168.1.1. A new printer with a static IP of 192.168.1.50 cannot be reached from a laptop obtaining an IP via DHCP. The laptop's IP is 192.168.1.100. Which of the following is the most likely cause?

Accepted Answer

The subnet mask is incorrect. The laptop obtains an IP address via DHCP, which typically assigns a subnet mask of 255.255.255.0 for a /24 network. If the printer has a static IP of 192.168.1.50 but is configured with an incorrect subnet mask (e.g., 255.255.255.252), the printer may believe it is on a different subnet than the laptop (192.168.1.100). This prevents the laptop from reaching the printer because the printer will not respond to ARP requests or will send traffic to its default gateway instead of directly to the laptop.

Answer

The printer is on a different VLAN

Answer

The default gateway is misconfigured

Answer

The DHCP scope is exhausted

Question 10

Which of the following describes a unicast transmission?

Accepted Answer

One-to-one communication. Unicast transmission is defined as one-to-one communication where a single source sends data to a single destination. In IPv4 networking, this is the standard method for most client-server interactions, such as a host sending an HTTP request to a web server. The destination MAC address in the Ethernet frame is the unique address of the target device, ensuring only that device processes the frame.

Answer

One-to-many communication

Answer

One-to-all communication

Answer

Many-to-many communication

Question 11

A network engineer is troubleshooting intermittent packet loss on a 10 km single-mode fiber link between two buildings. The link lights are on, but the interface shows a high number of CRC errors. The engineer has cleaned the fiber connectors and replaced the patch cables. What should the engineer check NEXT?

Accepted Answer

Check the transmit/receive optical power levels. CRC errors on a single-mode fiber link typically indicate physical-layer issues such as excessive attenuation or dispersion. Since cleaning connectors and replacing patch cables did not resolve the problem, the next logical step is to measure the optical power levels at both the transmitter and receiver using an optical power meter. This will confirm whether the received signal is within the acceptable range (e.g., -3 dBm to -20 dBm for 10GBASE-LR) and identify if a damaged transceiver or a splice loss is causing the errors.

Answer

Check the duplex settings on both ends

Answer

Verify the cable length is within specifications

Answer

Adjust the Spanning Tree Protocol priority

Question 12

A network engineer is designing a subnet to accommodate 50 devices in a single broadcast domain. The engineer uses a /26 subnet mask. How many usable host addresses are available?

Accepted Answer

62. A /26 subnet mask provides 2^(32-26) = 64 total addresses. Subtracting the network and broadcast addresses leaves 62 usable host addresses. This is sufficient for 50 devices in a single broadcast domain.

Answer

30

Answer

126

Answer

254

Question 13

A network administrator wants to ensure that SNMP traffic between the network monitoring server and managed devices is encrypted and provides authentication of the data origin. Which version of SNMP should be implemented?

Accepted Answer

C: SNMPv3. SNMPv3 is the correct choice because it provides both encryption (via the AuthPriv security level) and data origin authentication (via the AuthNoPriv or AuthPriv levels). Unlike earlier versions, SNMPv3 includes a security model that ensures confidentiality, integrity, and authentication, meeting the administrator's requirements.

Answer

A: SNMPv1

Answer

B: SNMPv2c

Answer

D: SNMPv2

Question 14

Which of the following network protocols operates at the Transport layer of the OSI model and provides connection-oriented, reliable data delivery?

Accepted Answer

TCP. TCP (Transmission Control Protocol) operates at the Transport layer (Layer 4) of the OSI model and provides connection-oriented, reliable data delivery through mechanisms such as three-way handshake, sequence numbers, acknowledgments, and retransmission of lost segments. This ensures that data is delivered in order and without errors, making TCP the correct choice for the question.

Answer

UDP

Answer

IP

Answer

ARP

Question 15

A user reports that they cannot access the internet. The network technician checks the workstation's IP configuration and finds the IP address 169.254.15.77. What does this address indicate?

Accepted Answer

The DHCP server is unreachable.. The IP address 169.254.15.77 falls within the Automatic Private IP Addressing (APIPA) range (169.254.0.0/16, per RFC 3927). This address is automatically assigned by the operating system when a DHCP client fails to receive a lease from a DHCP server, indicating that the DHCP server is unreachable or not responding.

Answer

The workstation has a static IP address configured.

Answer

The DNS server is down.

Answer

The default gateway is misconfigured.