Network Connectivity Troubleshooting: Master Common Issues and Solutions

Question 1

Which of the following is the most definitive sign of an IP address conflict?

Accepted Answer

Error messages explicitly stating an IP address conflict

Answer

Slow network performance

Answer

Inability to access the internet

Question 2

What is the primary function of the Domain Name System (DNS)?

Accepted Answer

Translating domain names into IP addresses

Answer

Caching frequently accessed websites

Answer

Preventing unauthorized access to network resources

Question 3

What is the main purpose of a Media Access Control (MAC) address?

Accepted Answer

Identifying a specific device connected to a network

Answer

Providing a unique internet address

Answer

Encrypting network traffic

Question 4

What is the distinction between a ping and a traceroute test?

Accepted Answer

Ping tests connectivity to a single destination, while traceroute maps the path to that destination

Answer

Traceroute tests connectivity to a single destination, while ping maps the path to that destination

Answer

Ping and traceroute tests are essentially the same thing

Question 5

Which utility is primarily used to diagnose network connectivity issues by sending ICMP echo requests?

Accepted Answer

ping

Answer

nslookup

Answer

tracert

Answer

ipconfig

Question 6

Which type of DNS record is used to map hostnames to their corresponding IP addresses?

Accepted Answer

A

Answer

CNAME

Answer

MX

Answer

NS

Question 7

Which physical layer issue can lead to intermittent network connectivity problems?

Accepted Answer

Loose cable connections

Answer

Faulty network interface card

Answer

Overheating router

Answer

Power outage

Question 8

What is the primary function of a subnet mask in network addressing?

Accepted Answer

Determines the network ID and host ID

Answer

Specifies the default gateway

Answer

Resolves hostnames to IP addresses

Answer

Controls network traffic flow

Question 9

Which network protocol is primarily responsible for establishing and maintaining connections between devices on a network?

Accepted Answer

TCP

Answer

UDP

Answer

ICMP

Answer

HTTP

Question 10

What is the main purpose of using a traceroute utility?

Accepted Answer

Diagnose network latency and trace the path taken by packets

Answer

Identify IP address conflicts

Answer

Resolve DNS issues

Answer

Detect physical cable faults

Question 11

Which troubleshooting approach involves isolating and eliminating potential causes of a problem one step at a time?

Accepted Answer

Divide and conquer

Answer

Brute force

Answer

Guess and check

Answer

Trial and error

Question 12

What is the recommended first step when troubleshooting network connectivity issues?

Accepted Answer

Checking physical connections

Answer

Restarting network devices

Answer

Contacting the ISP

Answer

Reinstalling the network driver

Question 13

Which of the following tools can be used to physically examine and diagnose network connectivity issues?

Accepted Answer

Cable tester

Answer

Ping

Answer

Traceroute

Answer

Wi-Fi analyzer

Question 14

Which of the following is a clear indication of an IP address conflict on a network device?

Accepted Answer

Duplicate IP addresses in the ARP table

Answer

Loss of Internet connectivity

Answer

Slow network performance

Answer

Increased latency

Question 15

What is the initial step in troubleshooting a network connectivity problem?

Accepted Answer

Checking physical connections

Answer

Verifying IP address settings

Answer

Restarting network devices

Answer

Running network diagnostics

Question 16

Which tool is primarily used for monitoring network traffic?

Accepted Answer

Network sniffer

Answer

Ping

Answer

Nslookup

Answer

Tracert

Question 17

What is the primary role of a firewall in a network?

Accepted Answer

Protecting against unauthorized access

Answer

Boosting network speed

Answer

Troubleshooting network issues

Answer

Monitoring network traffic

Question 18

Which action is discouraged as a best practice in network troubleshooting?

Accepted Answer

Changing multiple settings simultaneously

Answer

Documenting the problem before troubleshooting

Answer

Restarting devices before further investigation

Answer

Thoroughly testing solutions before implementing them

Question 19

Which of the following is the most common cause of IP address conflicts?

Accepted Answer

Duplicate IP addresses assigned to multiple devices on the same network

Answer

Faulty DHCP server

Answer

Incorrect subnet mask configuration

Question 20

Which type of cable is primarily used for establishing wired network connections?

Accepted Answer

Ethernet

Answer

USB

Answer

Coaxial

Answer

Optical fiber

Question 21

Which of the following is an uncommon symptom of a network connectivity issue?

Accepted Answer

Exceptionally high internet speed

Answer

Error messages indicating network problems

Answer

Inability to connect to websites

Answer

Slow or unreliable network access

Question 22

When troubleshooting network connectivity issues, which action should be prioritized?

Accepted Answer

Inspecting physical connections and cables

Answer

Updating network drivers

Answer

Resetting network settings

Answer

Contacting the internet service provider

Question 23

Which command can be used to display the IP configuration of a device running Windows?

Accepted Answer

ipconfig /all

Answer

networkinfo

Answer

netcfg

Answer

ifconfig

Question 24

What is the primary purpose of a gateway in a network?

Accepted Answer

To facilitate communication between different networks

Answer

To assign IP addresses

Answer

To store user data

Answer

To provide network security