Module 6 Review Exam
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Questions and Answers

Which command is considered deprecated on Linux and has been replaced by the ss command?

  • ifconfig
  • ipconfig
  • tcpdump
  • netstat (correct)
  • What is the primary purpose of the netstat command?

  • To manage and view network interface configurations and IP addressing
  • To configure and manage routing tables and network interfaces
  • To display detailed information about network connections, listening ports, routing tables, and interface statistics (correct)
  • To capture network traffic and filter it based on specific criteria
  • Which command is the standard utility for querying and modifying network adapter settings on Windows?

  • ifconfig
  • ip
  • netstat
  • ipconfig (correct)
  • Which of these commands is used to manage and view network interface configurations and IP addressing on Linux?

    <p>ip (A)</p> Signup and view all the answers

    What are the filter expressions used in the tcpdump command used for?

    <p>Specifying which network traffic to capture and analyze (D)</p> Signup and view all the answers

    Which of the following is NOT a potential reason for a Request Timed Out message when pinging a host?

    <p>The host is actively sending data to other devices. (D)</p> Signup and view all the answers

    What is the main purpose of the TTL (Time to Live) value in an IP packet?

    <p>To limit the number of times a packet can be forwarded by routers. (B)</p> Signup and view all the answers

    Which of the following is a limitation of the ping command compared to traceroute/tracert?

    <p>Ping does not provide information about the packet content or protocol-level issues. (C)</p> Signup and view all the answers

    What does the -6 option in the Windows ping command indicate?

    <p>Ping should use the IPv6 protocol. (D)</p> Signup and view all the answers

    A Destination Host Unreachable message during a ping test most likely suggests which of the following?

    <p>There's a misconfigured or missing route in the network. (B)</p> Signup and view all the answers

    Which command is used to trace the path packets take to reach a destination in Unix-based operating systems like Linux and macOS?

    <p>traceroute (C)</p> Signup and view all the answers

    What information does traceroute/tracert provide that ping does not? (Select all that apply.)

    <p>The average time it takes for packets to reach each hop. (B), The IP address of each router along the path. (C)</p> Signup and view all the answers

    What does the --n 50 option in the ping command ping -6 --n 50 example.com specify?

    <p>The number of ICMP packets to send to the destination. (C)</p> Signup and view all the answers

    What would happen if a packet's TTL reaches 0 while it's being forwarded by routers?

    <p>The packet is discarded by the router that receives it. (B)</p> Signup and view all the answers

    Which of the following is NOT a common reason for a ping request to fail?

    <p>The destination host is using a different operating system. (C)</p> Signup and view all the answers

    What should be done if your initial theory about the problem is not confirmed?

    <p>Establish a new theory by reevaluating your information. (C)</p> Signup and view all the answers

    Which phase involves deciding the specific actions required to fix an identified problem?

    <p>Identify Solutions (B)</p> Signup and view all the answers

    What is a crucial step to take before implementing any fix?

    <p>Protect the integrity of data by ensuring backups. (C)</p> Signup and view all the answers

    What should be established after confirming the cause of the problem?

    <p>A detailed action plan with defined specific steps. (C)</p> Signup and view all the answers

    What is emphasized when considering the needed actions following a confirmed theory?

    <p>Assessing the tools, personnel, and time required. (D)</p> Signup and view all the answers

    During troubleshooting, why should unnecessary delays be avoided?

    <p>To prevent the problem from escalating out of control. (D)</p> Signup and view all the answers

    If the issue is beyond your ability and skills, what action should be taken?

    <p>Escalate it to a specialist or higher-level support. (A)</p> Signup and view all the answers

    What is a consequence of installing STP in low-interference areas?

    <p>It can introduce interference if not grounded properly. (B)</p> Signup and view all the answers

    What happens if STP cables are not grounded correctly?

    <p>Signal quality may degrade. (D)</p> Signup and view all the answers

    Which of the following is most likely to result from improper cable termination?

    <p>Connection failures. (D)</p> Signup and view all the answers

    How can the mixed use of wiring standards like T568A and T568B affect network cables?

    <p>It may lead to mismatched pin configurations. (C)</p> Signup and view all the answers

    What does the presence of open wires in a cable indicate?

    <p>One or more wires are not connected fully. (C)</p> Signup and view all the answers

    What is a potential issue caused by shorts in cable wiring?

    <p>Signal distortion or failure. (A)</p> Signup and view all the answers

    Which wiring error occurs when two pairs of wires are swapped incorrectly?

    <p>Crossed pairs. (B)</p> Signup and view all the answers

    What does a reverse pair wiring error indicate?

    <p>Transmit and receive wires are swapped. (D)</p> Signup and view all the answers

    What common issue is associated with improper termination of network cables?

    <p>Poor signal quality and connection failures. (A)</p> Signup and view all the answers

    What is one of the impacts of poor QoS configuration on network traffic?

    <p>Competing for bandwidth (D)</p> Signup and view all the answers

    What is the recommended solution for resolving issues caused by faulty hardware in a network?

    <p>Replace faulty hardware (C)</p> Signup and view all the answers

    What typically happens during congestion in a network?

    <p>Devices wait to send data (B)</p> Signup and view all the answers

    Which approach can be taken to address oversubscription in a network?

    <p>Segment the network with VLANs (C)</p> Signup and view all the answers

    What can cause network bottlenecking?

    <p>Overloaded network components (C)</p> Signup and view all the answers

    What role does QoS play in inefficient traffic management?

    <p>It enables prioritization of real-time applications (A)</p> Signup and view all the answers

    What can help manage burst traffic patterns effectively?

    <p>Scheduling bandwidth-intensive tasks during off-peak hours (A)</p> Signup and view all the answers

    Why is it necessary to identify high-bandwidth users in a network?

    <p>To reduce congestion in the network (A)</p> Signup and view all the answers

    Which of the following is an effect of network bottlenecking?

    <p>Slower data transfer rates (C)</p> Signup and view all the answers

    What is one approach to improve network performance regarding bandwidth consumption?

    <p>Increase the bandwidth by upgrading connections (C)</p> Signup and view all the answers

    Flashcards

    tcpdump command

    A command-line tool for capturing network packets based on filters.

    netstat

    A command-line tool that displays active network connections and statistics.

    netstat options

    Options that customize the output of the netstat command.

    ss command

    A modern tool for network connections, faster than netstat.

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    ipconfig

    Windows command for managing network adapter settings.

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    Testing the Theory

    Confirm whether your best guess about the cause of a problem is accurate.

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    Identify Solutions

    Determine specific actions to fix the identified cause of the issue.

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    Prioritizing Actions

    Decide in what order you should implement the solutions you've identified.

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    Resource Assessment

    Evaluate the necessary tools, personnel, and time needed to fix the issue.

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    Establish a New Theory

    Reassess your findings and consider alternative explanations if your theory is not confirmed.

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    Escalate the Issue

    Refer the problem to a higher-level specialist if it's beyond your capability to solve.

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    Establish a Plan of Action

    Create a detailed step-by-step strategy to resolve the confirmed issue.

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    TTL (Time to Live)

    A field in packet headers that limits packet lifespan; decreases by 1 at each router.

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    ping command

    A network utility that sends ICMP echo requests to test reachability of a host.

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    Request Timed Out

    Message indicating no reply was received to a ping request in a set time.

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    Destination Host Unreachable

    Message indicating the packet couldn't reach the target due to network issues.

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    ICMPv6

    Internet Control Message Protocol for IPv6, used in the ping command.

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    traceroute command

    A tool to trace the path packets take to reach a destination and identify delays.

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    tracert command

    The Windows version of the traceroute command, used to trace network paths.

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    network loops

    Situations where packets endlessly circulate in the network, causing congestion.

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    firewall ICMP blockage

    When firewalls prevent ICMP packets from passing, affecting ping responses.

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    echo request packets

    ICMP packets sent out during a ping command to test reachability.

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    STP Installation

    Installing Shielded Twisted Pair in low-EMI areas can add costs without benefit.

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    STP Grounding

    Improper grounding of STP cables can make shielding ineffective, degrading signal quality.

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    Cable Termination

    Proper termination connects network cables correctly; improper termination leads to failures.

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    Improper Pinouts

    Using mixed standards or non-standard wiring can result in mismatched pin configurations.

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    Open Wires

    Open wires mean one or more cables are not connected, disrupting communication.

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    Short Circuits

    Shorts occur when two wires contact each other, causing signal distortion.

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    Crossed Pairs

    Crossed pairs occur when wire pairs are swapped during termination, disrupting communication.

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    Reverse Pairs

    Reverse pairs can occur when transmit and receive wires are flipped during termination.

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    Signal Degradation

    Signal degradation results from incorrect installations or terminations, affecting network performance.

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    QoS Configuration

    Quality of Service settings to prioritize network traffic for real-time applications.

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    Jitter

    Variation in packet delivery times, impacting real-time traffic quality.

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    Congestion

    Excess network traffic causing delays and performance issues.

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    Contention

    Multiple devices competing for the same network resources simultaneously.

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    High Bandwidth Usage

    Significant data consumption by multiple devices exceeding the network's capacity.

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    Oversubscription

    Too many devices connected to the same network resource, causing contention.

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    Inefficient Traffic Management

    Unmanaged data flow leading to critical applications being deprived of resources.

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    Burst Traffic Patterns

    Sudden increases in network traffic temporarily overwhelming the system.

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    Bottlenecking

    When network components are overloaded, limiting data flow and slowing performance.

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    Network Segmentation

    Dividing a network into segments to distribute traffic more evenly.

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    Study Notes

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    Description

    Explore essential steps and structured methodologies for effective network troubleshooting. This quiz covers how to identify problems, gather pertinent information, and utilize documentation for efficient issue resolution. Mastering these techniques is crucial for maintaining robust network performance.

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