ACI - Mod 9 Part 7

Which command is used to establish a session with a device located at a specific IP address and port for troubleshooting network services?

• telnet

• ping

• ftp

• ssh

Answer explanation

The correct command to establish a session with a device at a specific IP address and port for troubleshooting network services is telnet.

By default, which port does the telnet session connect to when establishing a session with a device?

• 23

• 80

• 22

• 21

Answer explanation

By default, the telnet session connects to port 23 when establishing a session with a device, making 23 the correct choice.

Which command in Linux is used for DNS querying and provides advanced DNS functionality?

• dig

• ping

• traceroute

• netstat

Answer explanation

The command in Linux used for DNS querying and advanced DNS functionality is 'dig'.

What does the 'dig' command stand for?

• Domain Information Groper

• Domain Information Gatherer

• Domain Information Getter

• Domain Information Generator

Answer explanation

The 'dig' command stands for Domain Information Groper, making it the correct choice among the options provided.

Which of the following is NOT a type of DNS record that can be retrieved using the 'dig' command?

• A records

• CNAME records

• MX records

• HTTP records

Answer explanation

The correct choice is HTTP records because 'dig' command does not retrieve HTTP records as they are not part of DNS records.

Which command in Linux is used to track the route taken by packets from a local system to a destination IP address or domain?

• dig

• traceroute

• tcpdump

• nmap

Answer explanation

The correct command in Linux used to track the route taken by packets is 'traceroute'.

What is the primary function of the tcpdump command in Linux?

• To perform DNS analysis

• To capture and analyze network traffic in real time

• To scan for open ports and vulnerabilities

• To track the route of packets

Answer explanation

The primary function of the tcpdump command in Linux is to capture and analyze network traffic in real time.

Which nmap command performs a basic ping scan to discover live hosts on a network without scanning any ports?

• nmap -p

• nmap -sS

• nmap -sn

• nmap -A

Answer explanation

The correct nmap command for a basic ping scan without scanning ports is 'nmap -sn'. This command is used to discover live hosts on a network.

What does the nmap -A switch enable?

• Basic ping scan

• TCP Connect scan

• Aggressive scanning with OS detection, version detection, script scanning, and traceroute

• Stealth scan

Answer explanation

Aggressive scanning with OS detection, version detection, script scanning, and traceroute

Which nmap command performs a TCP SYN scan, also known as a "stealth scan"?

• nmap -p

• nmap -sS

• nmap -sn

• nmap -A

Answer explanation

The correct nmap command that performs a TCP SYN scan, also known as a 'stealth scan', is 'nmap -sS'.