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CV0-002 · Question #169

A company has changed their web hosting policy and now requires SSL certificates on all web servers. Users are reporting that they can no longer access an internal website. Which of the following…

The correct answer is C. netstat. To determine if port 443 is listening on a server, the administrator should run the netstat command.

Troubleshooting

Question

A company has changed their web hosting policy and now requires SSL certificates on all web servers. Users are reporting that they can no longer access an internal website. Which of the following commands should the administrator run to determine if port 443 1s listening? (Select two.)

Options

  • Atraceroute
  • Btelnet
  • Cnetstat
  • Dipconfig
  • Enslookup

How the community answered

(45 responses)
  • B
    4% (2)
  • C
    93% (42)
  • E
    2% (1)

Why each option

To determine if port 443 is listening on a server, the administrator should run the `netstat` command.

Atraceroute

`traceroute` maps the network path to a destination and does not show listening ports on the target server.

Btelnet

`telnet` can be used to test connectivity to a specific port on a remote or local machine, but `netstat` directly lists the listening processes on the local machine, providing a more definitive answer for local port status.

CnetstatCorrect

The `netstat` command (often used with options like `-an` on Windows or `-tuln` on Linux) displays active network connections, routing tables, and a list of listening ports on the local machine. It allows an administrator to directly verify if a service, such as a web server, is actively listening for incoming HTTPS connections on port 443.

Dipconfig

`ipconfig` displays network interface configuration like IP addresses and subnet masks, not listening ports.

Enslookup

`nslookup` performs DNS queries to resolve hostnames to IP addresses or vice versa, and does not provide information about listening ports.

Concept tested: Network utility commands for port status

Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/netstat

Topics

#netstat#port checking#SSL troubleshooting

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