Troubleshoot Windows Networking

Question 1

Answer 1

ipconfig

Question 2

Answer 2

ping

Question 3

Answer 3

Examples of error messages using ping.

Question 4

Answer 4

Using tracert in Windows.

Question 5

Answer 5

Using nslookup to query the mail server configured for the comptia.org domain name using
Google’s public DNS servers (8.8.8.8).

Question 6

Answer 6

Displaying listening connections and the processes that opened each port with netstat.

Question 7

IP Configuration

Limited connectivity

Answer 7

The adapter is set to obtain an address automatically, but no DHCP server can be contacted.

Question 8

Automatic Private IP Addressing (APIPA)

Answer 8

It’s a backup system for when a device can’t get an IP address from a DHCP server.

Question 9

IP Configuration

“No Internet access”

Answer 9

This means that the IP configuration is valid for the local network but that Windows cannot identify a working Internet connection.

Question 10

ipconfig command tool

Answer 10

information is displayed through Network &
Internet settings or the adapter’s status dialog.

Question 11

ipconfig Command

Answer 11

displays the IP address, subnet mask, and
default gateway (router) for all network adapters to which TCP/IP is bound.

Question 12

Run ipconfig

Answer 12

• Use commands like* ipconfig /all* to check current settings,* ipconfig /release* & ipconfig /renew to refresh IP, and* ipconfig /flushdns *to clear DNS cache.

Question 13

• Verify DHCP & APIPA

Answer 13

• If “No Internet Access” appears, test connectivity with ping 8.8.8.8 and consider changing DNS settings.

Question 14

• Reset Network Settings

Answer 14

• Use* netsh int ip* reset and netsh winsock reset to restore default configurations. Let me know if you need deeper insight into any of these steps!

Question 15

ipconfig /displaydns

Answer 15

Display the DNS resolver cache. This contains host and domain names that have been queried recently.

Question 16

hostname Command

Answer 16

displays name of local machine.

If machine is configured as a server, client machines will need to use the hostname to access shared folders and printers.

Question 17

Network reset
command

Answer 17

clear any custom adapter configurations and network connections, including VPN connections, on Settings > Network & Internet > Status page. Reconfigure.

Question 18

ping command

Answer 18

command-line diagnostic tool used to test whether
a host can communicate with another host on the same network or on a remote network.

Question 19

ping command

Loopback Test (ping 127.0.0.1)

Answer 19

Confirms that TCP/IP is installed correctly.

Question 20

ping command

Workstation IP Test

Answer 20

– Ensures the assigned IP is correct and detects potential duplicates.

Question 21

ping command

Default Gateway Test

Answer 21

– Verifies the router is active and local network communication is working.

Question 22

ping command

Remote Host Test

Answer 22

– Confirms the ability to communicate beyond the router to external networks.

Question 23

“Reply from SenderIP Destination unreachable”

Answer 23

Indicates no response to ARP probes, suggesting the host is either disconnected, non-discoverable, or misconfigured (e.g., duplicate IP or incorrect subnet).

Question 24

“Reply from GatewayIP: Destination unreachable”

Answer 24

– Means the router has no route to the destination, pointing to a possible network misconfiguration.

Question 25

# ping command "Request timed out"

Answer 25

Suggests the destination host is either offline or configured to ignore ping requests.

Question 26

To troubleshoot remote network connectivity

Answer 26

The `tracert` command traces the path a packet takes to its destination, identifying routing issues at each hop using IP addresses or FQDNs to diagnose network delays or unreachable hosts.

Question 27

The `tracert` and `pathping` commands

Answer 27

help diagnose network routing issues by tracing packet paths, measuring latency, and detecting packet loss, while troubleshooting steps include checking the router’s status, verifying ISP service, and restarting the router if necessary.

Question 28

To troubleshoot name resolution issues

Answer 28

first check for security blocks like firewalls or misconfigured proxy settings, then verify whether the application or OS is failing. Establish if the issue is isolated to one client or affects multiple hosts. If DNS resolution is suspected, use the `nslookup` command to query DNS records, compare results from different servers, and identify potential configuration issues.

Question 29

To troubleshoot network ports

Answer 29

use the *netstat* command to examine open connections on a local host, checking whether file sharing or email ports are accessible. By default, *netstat* lists active and listening TCP ports, with various switches available for deeper analysis

Question 30

Troubleshooting Network ports:

Answer 30

**- -a** includes UDP listening ports, **- -b** identifies processes using each port (requires admin privileges), **- -o** shows process IDs instead of names, **- -n** speeds up queries by displaying numeric addresses, **- -e **and -s provide Ethernet and protocol statistics.

Question 31

Process ID (PID)

Answer 31

unique numerical identifier assigned by the operating system to each running process (Command-line). It's used for various purposes, including process management, resource allocation, and debugging.