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WorksheetsQuiz: Network+ Section 1 Quiz
Total questions: 53
Worksheet time: 29mins
Which of the following are layers of the OSI reference model? (Select three.)
Session Layer
Application Layer
Presentation Layer
WAN Layer
Transmission Layer
You just finished establishing a detailed plan of action to resolve the problem, which includes replacing a faulty network switch that has been causing intermittent connectivity issues for several users. What is the next step you should take according to the CompTIA Network+ trouble shooting methodology?
Verify full system functionality by asking users if they are still experiencing issues
Implement the solution by replacing the faulty network switch.
Document the problem and the solution in the company's knowledge base.
Establish a new theory of probable cause for the connectivity issue.
Which of the following interfaces does a SOHO router provide at the Physical Layer of the OSI model? (Select three.)
Radio antennas for wireless signal transmission
WAN port for Internet Service Provider (ISP) connection
RJ-45 ports for a local cabled network
HDMI ports for multimedia streaming
SATA ports for internal storage connection
As the IT support specialist for a small company, you are approached by an employee who complains that they can't connect to the Internet. Preliminary checks show that the issue is isolated to this single workstation. Other devices on the same network are connecting without any issues.
You decide to employ the bottom-to-top OSI model approach to systematically troubleshoot and resolve the problem. Using the bottom-to-top OSI model approach, which of the following steps should you take first to troubleshoot the internet connectivity issue on the employee's work station?
Check the Ethernet cable and the network interface card (NIC) for any physical damage or disconnection
Verify that the web browser settings on the workstation are correctly configured.
Ensure that the workstation's firewall settings are not blocking internet access.
Confirm that the workstation is obtaining a valid IP address from the DHCP server.
Which of the following networking terms refers to the nodes that send and receive data traffic?
End systems
Network protocols
Network links
Intermediate nodes
Which of the following sets correctly represents the possible values that can be represented by each digit in hexadecimal notation?
0 through 7
0 through 9 and A through F
0 through 9 and A through E
What is the MOST effective method for protecting the management interface of a SOHO router?
Disabling the firewall
Setting the router to automatically accept firmware updates
Enabling UPnP (Universal Plug and Play)
Configuring a strong administrative account passphrase
Which of the following functions does a SOHO router implement at layer 2 to make use of its Physical layer adapters? (Select two.)
DHCP server
Network Address Translation (NAT)
Firewall
Wireless access point
Ethernet switch
You own a small business and have decided to set up a network where each computer acts as both a client and a server. This decentralized model should allow for the provisioning, management, and security of services and data that you want distributed around the network. What type of network would BEST meet your requirements?
Virtual Private network
Client-Server network
Enterprise network
Peer-to-Peer network
Which of the following statements accurately describes the function of the Session layer (layer 5) in the OSI model?
The Session layer is responsible for routing packets across different networks.
The Session layer is used for character set conversion, such as between ASCII and Unicode.
The Session layer provides the physical transmission of data over network media.
The Session layer administers the process of establishing, managing, and terminating a dialog between client and server
What is the primary purpose of data encapsulation in network protocols?
To convert data into an analog signal for transmission
To encrypt data for secure transmission
To add additional data headers for routing and delivery
To compress data for faster transmission
A growing company has recently moved into a new office space. The company has 50 employees, each with their own workstation. The office also has multiple printers, a centralized server, and requires structured cabling for connectivity. Which type of network would be MOST effective for this setup?
Small and Medium-sized Enterprise (SME) network
Data Center
Wide Area Network (WAN)
Small Office/Home Office (SOHO) network
A small office/home office network is configured to use the private IP address range of 192.168.1.0/24. If you are setting up a SOHO router for this network, which of the following IP addresses would be the MOST appropriate for the router?
192.168.1.1
192.168.1.255
192.168.2.1
203.0.113.1
When the Data Link layer performs encapsulation, it adds control information to the payload in the form of header fields. Which of the following are header fields added by the Data Link layer during encapsulation? (Select three.)
Encryption type
TTL (Time to Live)
Checksum for basic error checking
Destination hardware address
Source hardware address
When troubleshooting a software issue reported by a user who is unfamiliar with technical terms, which type of question is MOST effective to begin the diagnostic process?
Asking if they have experienced this issue before
Asking them to describe what they were doing when the issue occurred
Asking if they have tried rebooting their computer
Asking for the error code displayed on the screen
A user is unable to print to a network printer. Which of the following is the first step that a technician should take to troubleshoot the issue?
Establish a plan of action to resolve the problem.
Establish a theory of probable cause.
Implement preventative measures.
Identify the problem.
Which of the following networking topologies connects each network device to a central forwarding appliance?
Star
Mesh
Bus
Ring
A system that contains custom applications routinely crashes. IT decides to upgrade the operating system after speaking with application support personnel, and testing the problem. What should IT do next to troubleshoot the issue?
Establish a plan of action.
Identify the problem.
Verify full system functionality and, if applicable, implement preventive measures.
Determine if anything has changed
What should you do when you discover symptoms of more than one problem while investigating a user's system issue?
Focus on the most complex problem first, assuming solving it will automatically resolve the others.
Immediately escalate all discovered problems to a higher-level support team without further investigation.
Treat each problem as a separate case, even if they seem related.
Advise the user to only report the most severe problem to avoid complicating the troubleshooting process.
You have a network that's connected using a full physical mesh topology. The link between Device A and Device B is broken. Which of the following BEST describes the effect that this will have on network communications?
Device A will be able to communicate with any device except for Device B.
Device A will be able to communicate with all other devices.
No devices will be able to communicate with any other device.
Device A will not be able to communicate with any other device.
When troubleshooting network issues using the CompTIA Network+ troubleshooting method, it's important to carry out tasks in a specific order. Drag each troubleshooting task on the left to the correct step on the right.
Identify the problem.
Establish a theory of probable cause.
Test the theory to determine the cause.
Establish a plan of action.
Implement the solution or escalate.
When troubleshooting network issues using the CompTIA Network+ troubleshooting method, it's important to carry out tasks in a specific order. What are the LAST TWO steps? Select 2.
Verify full system functionality.
Document findings, actions and outcomes.
Test the theory to determine the cause.
Establish a plan of action.
Implement the solution or escalate.
What do Internet Service Providers (ISPs) use to establish links between their networks within an Internet eXchange Point (IXP) data center?
NFC (Near Field Communication)
Bluetooth connectivity
Peer-to-peer file sharing
Transit and peering arrangements
A multinational corporation has its main office in New York and branch offices in London, Tokyo, and Sydney. The corporation needs a network that can connect all these offices together, allowing for seamless communication and data transfer. What type of network would best suit this corporation's needs?
Local Area Network (LAN)
Wide Area Network (WAN)
Metropolitan Area Network (MAN)
Personal Area Network (PAN)
An engineer uses a type of network adapter to connect a fiber link to a router. The transceiver fits into an optical interface on a layer 3 Ethernet router. Of the choices, which layer 1 implementation does the engineer utilize?
Media converter
VoIP endpoint
Switch
Bridge
What is a Protocol Data Unit (PDU)?
A type of encryption used in data transmission
A chunk of data with protocol-specific headers added at each OSI layer
A network engineer is designing a network in various offices to create multiple broadcast domains. Each has its own Virtual Local Area Network (VLAN). When configuring these multiple broadcast domains on the switch, the switch will be operating at what layer of the OSI model?
Layer 1 (Physical Layer)
Layer 7 (Application Layer)
Layer 2 (Data Link Layer)
Layer 4 (Transport Layer)
You've implemented an ad hoc wireless network that doesn't employ a wireless access point. Every wireless network card can communicate directly with any other wireless network card on the network. Which type of physical network topology have you implemented in this network?
Bus
Ring
Mesh
Star
When referencing network topologies, what distinguishes half-duplex from full-duplex communication in a point-to-point link?
Half-duplex communication uses a single cable for data transmission, whereas full-duplex requires separate cables for each direction.
Half-duplex allows for data transmission in both directions, but not simultaneously; full-duplex permits simultaneous two-way data transmission.
Half-duplex communication can only occur in one direction, while full-duplex allows for data transmission in both directions but not at the same time.
Full-duplex communication is limited to one direction at a time, similar to half-duplex, but it operates at higher speeds.
Which of the following MOST correctly describes using the divide and conquer approach of the OSI model for troubleshooting network issues?
Identifying the most likely layer causing the issue based on symptoms and preliminary information, then working either up or down the OSI model as needed to isolate and resolve the problem
Focusing solely on the Application Layer (Layer 7) to identify and resolve any software-related issues before considering network infrastructure problems
Checking all layers of the OSI model simultaneously to quickly identify and resolve network issues without considering the logical order of the layers
Before escalating a troubleshooting problem, what should you be able to do? (Select two.)
Change system settings randomly in hopes of stumbling upon a solution.
Establish the basic facts surrounding the problem.
Be able to communicate the basic facts clearly to the person to whom you are referring the incident.
Immediately escalate the problem without attempting any troubleshooting.
Wait for the problem to resolve itself before taking any action.
What is the decimal form of the following binary IP address? 11001101.00111001.10101001.01000010
206.58.170.67
205.57.169.66
238.90.202.99
190.42.154.51
In the OSI model, what is the primary function of the Network layer?
The primary function of the Network layer is to encode and convert data into signals suitable for transmission over the physical medium.
The primary function of the Network layer is to move data around an internetwork using logical network and host IDs.
The primary function of the Network layer is to establish, manage, and terminate connections between applications on different hosts.
The primary function of the Network layer is to ensure reliable transmission of data across a physical link.
Match each networking function or device on the left with its associated OSI model layer on the right.
HTTP
Application layer
Translates data
Presentation layer
Session ID number
Session layer
Match the following network layers with their components:
Port number
Transport layer
Router
Network layer
Switch
Data Link layer
What is the role of an Access Control List (ACL) at Layer 3 (Network layer) of the OSI model?
A) To serve as a list of permissions for file access on the network
B) To filter network traffic by permitting or blocking packets based on IP addresses and other criteria
C) To define the maximum size for packets transmitted across the network
D) To act as a routing protocol for determining the best path for data packets.
When verifying a solution to a reported problem, what is the primary goal?
To validate that the solution fixes the reported problem without affecting the system's overall functionality
To change the system's configuration settings
To ensure the system functions faster than before
To implement additional features unrelated to the problem
When you have diagnosed the symptoms of a network issue and know what is likely causing them, what should you do next?
Ignore the symptoms and focus on unrelated components
Test each possible cause until you find the right one.
Document the symptoms without further action.
Immediately replace all network components.
How is identifying the location and scope of a problem helpful in the troubleshooting process? (Select two.)
It allows for the immediate resolution of the problem without further analysis.
It automatically resolves any related issues without intervention
It helps prioritize the problem in relation to other incidents
It helps identify the source of the problem.
It eliminates the need for gathering further information from users
At layer 4 of the OSI model, how is each application identified to facilitate proper routing and delivery of data?
By the MAC address of the destination device
By a unique port number assigned to the application
Through the application's unique username and password
Through the use of encryption algorithms
What role does the Presentation layer (layer 6) of the OSI model play in terms of data compression and encryption?
The Presentation layer is involved in the logical organization of data into frames for transmission
The Presentation layer supports data compression and encryption to prepare data for network transmission
The Presentation layer handles the routing of data between different networks and supports encryption protocols like IPsec.
The Presentation layer is primarily responsible for the physical encryption of data using hardware-based methods
A help desk operator is troubleshooting a site that is no longer responsive. Which of the following is the last step the operator should perform.
Document findings
Establish plan of action
Implement solution
Determine cause
What is the recommended action when applying a solution that is disruptive to the wider network during troubleshooting?
Apply the solution immediately to minimize troubleshooting time
Consider the most appropriate time to schedule the reconfiguration work and plan how to notify other network users.
Proceed with the solution without informing anyone to avoid causing panic.
Disconnect the network to ensure no one is using it before applying the solution.
A security engineer configures software-based port security on a hardware firewall. Which OSI model layer identifies the application ports to configure?
3
1
2
4
You manage a network that's connected using a physical star topology. One of the drop cables connecting a workstation has been removed. Which of the following BEST describes the effect that this will have on network communications?
All devices except the device connected with the drop cable will be able to communicate.
Only devices on one side of the missing cable will be able to communicate with each other, while only devices on the other side of the missing cable will be able to communicate with each other.
No devices will be able to communicate.
When trying to identify the cause of a problem, which of the following are key questions to ask? (Select 2)
Is the system turned on?
What has changed since it was last working?
Should we switch to a different software platform?
Can the problem be solved by buying new hardware?
Did it ever work?
Which of the following functions are performed by the OSI Transport layer? (Select 3)
Data segmentation and reassembly
Reliable message delivery
End-to-end flow control
Path identification and selection
Which of the following BEST describes a demarcation point in the context of telecommunications?
The point at which the telco's cabling enters the customer premises
The central hub where all ISPs connect and exchange data
The maximum data transfer rate achievable by the ISP
The protocol used for encrypting data over the Internet
Your company has a network where all devices can communicate with each other as if they were directly connected, regardless of the physical connections. What type of network topology does this describe?
Star
Logical
Mesh
Ring
Select three of the devices that operate at the Data Link layer of the OSI model.
Bridges
Network interface cards (NICs)
Repeaters
Switches
A freelance photographer is setting up a home office. They need to connect a desktop, a laptop, a network printer, and occasionally, guests' devices to the Internet and to each other for file sharing and printing. Which type of network is MOST suitable for this scenario?
MAN (Metropolitan Area Network)
CAN (Campus Area Network)
PAN (Personal Area Network)
SOHO (Small Office/Home Office) Network
A communications engineer notices that every time it rains the signal becomes very degraded. Which layer of the OSI model is the engineer most likely troubleshooting?
Transport
Physical
Data link
Application
A team of network consultants is configuring an Internet of Things (IoT) network. The team is considering network topologies in the context of the IoT devices being used, which are all within 100 meters of one another, are batterypowered, and communicate via the Zigbee protocol. Which of the following network topologies would BEST save power and scale easily to thousands of IoT sensor devices while saving power by cooperating with nearby devices?
Mesh
Ring
Star
Bus
