Network Troubleshooting: Master Common Network Problems

Question 1

Which of the following is an indication of a potential DNS issue?

Accepted Answer

Inability to access specific websites only

Answer

Slow internet speeds only

Answer

Frequent disconnections only

Answer

Security alerts only

Question 2

When troubleshooting a network connectivity issue, which action should be performed first?

Accepted Answer

Check network cables and connections

Answer

Restart the router or modem

Answer

Contact the Internet Service Provider (ISP)

Answer

Run a network diagnostic tool

Question 3

Which type of security breach involves gaining unauthorized access to a computer system without permission?

Accepted Answer

Hacking

Answer

Malware attack

Answer

Phishing scam

Answer

Data theft

Question 4

What is the primary purpose of using the 'traceroute' command in network troubleshooting?

Accepted Answer

To determine the path taken by packets

Answer

To monitor the volume of network traffic

Answer

To resolve IP addresses to domain names

Answer

To detect and remove malware

Question 5

What is the primary purpose of a MAC address?

Accepted Answer

To uniquely identify a specific device on a network

Answer

To route network traffic efficiently

Answer

To provide security for a network

Answer

To control access to a website

Question 6

Which network security threat involves intercepting and stealing sensitive data as it travels across a network?

Accepted Answer

Eavesdropping

Answer

Malware

Answer

Phishing

Answer

Denial-of-service attack

Question 7

Which of the following is a common symptom of a DNS error?

Accepted Answer

Unable to resolve domain names

Answer

Slow internet speeds

Answer

Intermittent network connectivity

Answer

Loss of network connection

Question 8

As a network administrator, what should be your first step when troubleshooting a network problem?

Accepted Answer

Inspect physical connections and verify their security

Answer

Restart network devices to reset their configurations

Answer

Execute diagnostic tools to identify potential issues

Answer

Contact your internet service provider (ISP) for assistance

Question 9

What is the primary function of a firewall within a computer network?

Accepted Answer

Prevent unauthorized access to the network and its resources

Answer

Scan for and eliminate viruses, malware, and other threats

Answer

Enhance network performance and optimize data transfer

Answer

Connect different networks and facilitate communication between them

Question 10

Which of the following symptoms is uncommon when network connectivity issues arise?

Accepted Answer

Automatic installation of software updates

Answer

Noticeably slow internet speeds

Answer

Sporadic internet access with frequent interruptions

Answer

Increased latency causing delays in data transfer

Question 11

What is the primary responsibility of a Domain Name System (DNS) server?

Accepted Answer

Translate domain names into their corresponding IP addresses

Answer

Handle email communication and facilitate message exchange

Answer

Safeguard the network by filtering and blocking malicious traffic

Answer

Host websites and provide storage space for web content

Question 12

Which of the following factors can contribute to security breaches in a network environment?

Accepted Answer

All of the above factors can contribute to security breaches

Answer

Weak or predictable passwords used by network users

Answer

Outdated software and unapplied security patches

Answer

Phishing scams that deceive users into revealing sensitive information

Question 13

Which tool is commonly used by network administrators to diagnose and troubleshoot DNS errors?

Accepted Answer

Nslookup: A command-line tool for querying DNS servers and resolving domain names

Answer

Ping: A utility used to test connectivity and measure network latency

Answer

Traceroute: A tool for tracing the path taken by network packets as they travel across a network

Answer

Wireshark: A network analyzer used to capture and inspect network traffic

Question 14

What is the main purpose of a firewall in a network security setup?

Accepted Answer

Prevent unauthorized entities from accessing and exploiting network resources

Answer

Continuously monitor and detect malicious activities, isolating infected devices

Answer

Enhance network performance by optimizing data transfer and reducing latency

Answer

Provide remote access to network devices and facilitate secure connections from outside the network

Question 15

How do routers and switches differ in their roles within a network infrastructure?

Accepted Answer

Routers connect multiple networks, allowing communication between different subnets, while switches connect devices within a single network

Answer

Switches connect multiple networks, allowing communication between different subnets, while routers connect devices within a single network

Answer

Routers are primarily used for wireless connections, while switches are used for wired connections

Answer

Switches are primarily used for wireless connections, while routers are used for wired connections

Question 16

What is the primary function of a network protocol?

Accepted Answer

Define the rules and procedures for communication between devices on a network

Answer

Provide comprehensive security measures for network data

Answer

Enhance the overall performance and efficiency of a network

Answer

Enable the seamless connection of disparate networks

Question 17

To ensure clarity and accessibility for all users, which method is most effective for documenting network configurations?

Accepted Answer

Use a structured format that organizes information logically.

Answer

Document only major network changes, as minor changes are less significant.

Answer

Store documentation in multiple physical locations for redundancy and data protection.

Answer

Use technical jargon and abbreviations throughout the documentation for brevity and efficiency.

Question 18

Which of the following is not a typical cause of network connectivity issues?

Accepted Answer

Variations in hardware configurations

Answer

Faulty network cables or connectors

Answer

Malfunctioning network adapters

Answer

Software conflicts or incompatibilities

Question 19

What is the most common reason for encountering a DNS error?

Accepted Answer

Incorrect DNS server settings on the client device

Answer

Technical issues with the DNS server itself

Answer

General internet connectivity problems

Answer

Malware or virus infections on the network

Question 20

When troubleshooting network problems, what should be the initial step?

Accepted Answer

Inspecting physical connections and cables for any loose or damaged components

Answer

Restarting network devices like routers and switches to potentially resolve issues

Answer

Conducting diagnostic tests to identify specific network problems

Answer

Contacting the network administrator for immediate assistance

Question 21

Which type of malware has the ability to encrypt files, effectively holding them hostage?

Accepted Answer

Ransomware, a type of malware that encrypts files and demands a ransom

Answer

Virus, a malicious program that can replicate and spread through a network

Answer

Trojan horse, a program that disguises itself as legitimate software to gain access

Answer

Botnet, a network of infected computers controlled by a remote attacker

Question 22

To effectively protect a network from phishing attacks, what comprehensive approach should be adopted?

Accepted Answer

Combining all of the above measures for maximum protection

Answer

Educating users about phishing techniques and red flags

Answer

Deploying anti-phishing software to detect and block phishing attempts

Answer

Implementing robust spam filters to prevent phishing emails from reaching users

Question 23

Which of the following is not a common symptom experienced during a Denial-of-Service attack?

Accepted Answer

Loss or corruption of data due to disrupted services

Answer

Noticeable slowdown or unresponsiveness in network performance

Answer

Unexpected system crashes or reboots

Answer

Unusually high levels of network traffic flooding the system