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What is a sniffer in the context of server technology?
a. A device for increasing server speed
b. A tool for capturing and analyzing network traffic
c. A firewall configuration utility
d. A tool to manage user accounts
Answer: btutorialspoint+1
Which network interface mode allows a sniffer to capture all network packets?
a. Quiet mode
b. Active mode
c. Promiscuous mode
d. Standby mode
Answer: cendace+1
What is the main ethical concern with using sniffers?
a. Excess server load
b. Data privacy and unauthorized monitoring
c. Slower internet speed
d. Increased file transfer rates
Answer: bwebasha+1
Which of the following is NOT an objective of sniffing for hackers?
a. Fetching passwords
b. Email texts
c. Types of files transferred
d. Geographic location of a user
Answer: dsanfoundry
Which protocol is NOT susceptible to sniffing?
a. HTTP
b. SMTP
c. HTTPS
d. FTP
Answer: csanfoundry+1
What type of tool is Wireshark?
a. Firewall
b. Network sniffer
c. Email server
d. Proxy server
Answer: bthectoclub+2
What setting does a sniffer typically require on a NIC to capture all data packets?
a. Dormant mode
b. Alert mode
c. Promiscuous mode
d. Passive mode
Answer: cendace
Which of the following is a primary application of sniffers in server environments?
a. Power management
b. Network troubleshooting and analysis
c. Password storage
d. File backup
Answer: btutorialspoint+1
Which sniffer tool is command-line based?
a. Wireshark
b. tcpdump
c. Outlook
d. Snort GUI
Answer: bscribd+1
What type of sniffer does not require installation on a computer?
a. Hardware sniffer
b. Software sniffer
c. Browser plug-in
d. Virtual sniffer
Answer: atutorialspoint
How does a hardware sniffer differ from a software sniffer?
a. It runs on Linux only
b. It is a dedicated portable device
c. It is cloud-based
d. It is only for wireless networks
Answer: btutorialspoint
What is packet sniffing also known as?
a. Packet switching
b. Protocol analysis
c. Packet forging
d. Packet filtering
Answer: bgeeksforgeeks+1
Which layer of the OSI model do sniffers typically analyze?
a. Application
b. Physical
c. Data Link and Network layers
d. Session
Answer: ctutorialspoint
Sniffing can help to detect which of the following?
a. Software licensing issues
b. Network performance bottlenecks
c. CPU overheating
d. Server uptime
Answer: bwebasha+1
What does a sniffer capture in a network?
a. Only emails
b. All packets passing through a network segment
c. Only TCP packets
d. Only images
Answer: bgeeksforgeeks+2
Which is NOT a common use of sniffers?
a. Network troubleshooting
b. Security monitoring
c. Running virtual machines
d. Performance enhancement
Answer: cwebasha+1
Which of these is considered legal use of sniffers?
a. Unauthorized tapping of traffic
b. Employer-sanctioned network monitoring
c. Phishing
d. Server hacking
Answer: bwebasha+1
Which of the following can be detected with sniffers?
a. Malware infections
b. Expired SSL certificates only
c. File system errors
d. Disk fragmentation only
Answer: atutorialspoint
Sniffers are essential in penetration testing because they:
a. Boost server memory
b. Uncover network vulnerabilities
c. Encrypt passwords
d. Patch operating systems
Answer: bwebasha+1
Which of these formats do sniffers often use to store captured data?
a. .xls
b. .pcap
c. .docx
d. .csv
Answer: bendace
What is a potential drawback of hardware sniffers?
a. Difficult software installation
b. Higher cost
c. Large server resource usage
d. Limited accuracy
Answer: btutorialspoint
What is network sniffing primarily used for in security?
a. Deleting old files
b. Detecting intrusions
c. Updating firmware
d. Editing emails
Answer: bwebasha+1
Which of the following is NOT a feature of a network sniffer?
a. Analyze real-time traffic
b. Capture all subnets by default
c. Examine packet headers and payloads
d. Store traffic for later analysis
Answer: bendace+1
Sniffers can make use of which network techniques for capturing traffic?
a. IP spoofing
b. Promiscuous mode and port mirroring
c. DNS caching
d. MD5 hashing
Answer: bendace
Sniffing tools can be used to capture which type of data from a network?
a. Only video data
b. Any data packet (text, images, credentials, etc.)
c. Only compressed files
d. Only server logs
Answer: bendace+1
A MITM (Man-in-the-Middle) attack often relies on what?
a. Slow network speeds
b. Sniffing intercepted communications
c. Unused ports
d. DHCP configuration
Answer: byeahhub+1
SPAN and TAP are used in sniffing for what purpose?
a. Encrypt data streams
b. Mirror network traffic to monitoring devices
c. Filter spam emails
d. Authenticate users
Answer: bendace
Which filtering option is available in advanced sniffers?
a. Country-based filtering only
b. Protocol-level and IP filtering
c. Email subject filtering
d. Time zone restriction
Answer: btutorialspoint+1
Sniffing in an encrypted HTTPS session can capture:
a. Plaintext website content
b. Only encrypted packets
c. Decrypted video streams
d. Unencrypted FTP data
Answer: btutorialspoint
Which operating system is Wireshark available on?
a. Linux only
b. Windows, Linux, and macOS
c. Windows only
d. Solaris only
Answer: bthectoclub
The command-line sniffer commonly included in Linux distributions is:
a. Netcat
b. tcpdump
c. Paint
d. Zenmap
Answer: bscribd+1
In network sniffing, what does “capture filter” refer to?
a. Ignoring all packets
b. Selecting which packets to capture
c. Modifying network data
d. Amplifying network traffic
Answer: bendace+1
Which of the following cannot be sniffed?
a. FTP passwords
b. Telnet passwords
c. Cloud sessions (end-to-end encrypted)
d. Chat sessions
Answer: csanfoundry
What does promiscuous mode allow a NIC to do?
a. Only transmit data
b. Capture all packets, regardless of destination
c. Reboot servers
d. Filter ARP packets
Answer: bendace+1
Sniffers can be detected by monitoring for:
a. Unknown MAC addresses in ARP tables
b. Increased CPU fan speeds
c. Hidden application windows
d. Increased RAM usage
Answer: awebasha
What risk is present if sniffers are operated without proper authorization?
a. Legal liability and data breaches
b. Reduced disk usage
c. Automatic OS updates
d. Lowered power consumption
Answer: awebasha+1
What feature differentiates a passive sniffer from an active one?
a. Passive does not alter network traffic
b. Passive injects packets into the network
c. Passive blocks traffic
d. Passive requires administrative access
Answer: avinsys+1
Which of the following can minimize exposure to sniffing attacks?
a. Disabling firewalls
b. Using end-to-end encryption (HTTPS, SSL/TLS)
c. Allowing open Wi-Fi
d. Avoiding antivirus software
Answer: bwebasha+1
Which tool is NOT a sniffer?
a. Wireshark
b. Dude Sniffer
c. Maltego
d. Look@LAN
Answer: csanfoundry
Sniffer logs are valuable for:
a. Cooking recipes
b. Network forensic analysis
c. Formatting disks
d. Changing display settings
Answer: bendace+1
Which protocol is most susceptible to sniffing?
a. HTTPS
b. SSH
c. FTP
d. SFTP
Answer: csanfoundry+1
Which of the following is a primary use of sniffers by attackers?
a. Installing application software
b. Extracting confidential information from traffic
c. Improving server cooling
d. Backing up emails
Answer: btutorialspoint+1
Which of the following is NOT a preventive measure against sniffing?
a. Use strong encryption protocols
b. Enable port security
c. Disable antivirus software
d. Monitor network logs
Answer: cwebasha+1
Ethical hackers use sniffers for:
a. Malicious attacks
b. Penetration testing and vulnerability assessment
c. Spamming users
d. Infecting systems
Answer: btutorialspoint+1
Which data type is most vulnerable to sniffer-based attacks?
a. Plaintext passwords
b. Encrypted emails
c. Compressed archives
d. Disk images
Answer: asanfoundry+1
In what type of attack are sniffers often combined with ARP poisoning?
a. Directory traversal
b. DNS cache poisoning
c. Man-in-the-Middle (MITM)
d. SQL injection
Answer: cyeahhub+1
Which operating system often has pre-installed sniffer tools for diagnostics?
a. macOS
b. Linux
c. Windows Home
d. Android
Answer: bthectoclub+1
Which is a network protection measure against sniffing?
a. Regular disk defragmentation
b. Strong network segmentation and secure switch configurations
c. Disabling Internet access
d. Using weak passwords
Answer: bwebasha
What should be regularly reviewed to detect sniffer presence?
a. System clock settings
b. Network logs and unexpected NIC behavior
c. Wallpaper settings
d. Mouse pointer style
Answer: bendace+1
What is the first recommended action if unauthorized sniffing is detected?
a. Ignore
b. Isolate the affected segment and conduct a thorough investigation
c. Reboot randomly
d. Defragment the server drive
Answer: btutorialspoint+1

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