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What does VNC stand for in networking?
a. Virtual Network Computing
b. Virtual Node Communication
c. Virtual Native Connectivity
d. Virtual Network Connection
Answer: a. Virtual Network Computingdiscover.realvnc+3
Which protocol is primarily used by VNC for desktop sharing?
a. Remote Framebuffer Protocol (RFB)
b. Transmission Control Protocol (TCP)
c. Internet Protocol (IP)
d. Secure Shell Protocol (SSH)
Answer: a. Remote Framebuffer Protocol (RFB)wikipedia+3
What is the default TCP port number for VNC server communication?
a. 22
b. 3389
c. 5900
d. 443
Answer: c. 5900heimdalsecurity+3
VNC enables remote control of which part of a computer?
a. BIOS
b. GUI (Graphical User Interface)
c. Network Adapter
d. Hard Disk
Answer: b. GUI (Graphical User Interface)wirexsystems+3
Which component initiates a VNC connection?
a. VNC Server
b. VNC Client (Viewer)
c. File Transfer Protocol
d. The Hardware
Answer: b. VNC Client (Viewer)cbtnuggets+3
Which operating systems does VNC support?
a. Windows only
b. Linux and Windows
c. Cross-platform (Windows, macOS, Linux, etc.)
d. macOS only
Answer: c. Cross-platform (Windows, macOS, Linux, etc.)nordlayer+3
What is the main advantage of listening mode in VNC?
a. Lower bandwidth usage
b. Easier firewall configuration
c. Faster data transfer
d. Enhanced graphics
Answer: b. Easier firewall configurationwikipedia+1
What types of data are exchanged between VNC client and server?
a. Pixel data and input events
b. Database queries
c. Email attachments
d. HTTP requests
Answer: a. Pixel data and input eventsmit+3
Which of the following is a popular VNC variant?
a. UltraVNC
b. SSH
c. Telnet
d. FTP
Answer: a. UltraVNCdevopsschool+2
What does VNC compress to optimize bandwidth?
a. Audio files
b. Text documents
c. Pixel data
d. Scripts
Answer: c. Pixel datawirexsystems+1
What is a common security risk when using default VNC settings?
a. No encryption
b. Unavailable support
c. Forced shutdown
d. API blocking
Answer: a. No encryptionlinkedin+2
VNC uses which transport layer protocol?
a. UDP
b. TCP
c. ICMP
d. ARP
Answer: b. TCPlinkedin+2
What encoding method sends pixel data in scanline order in VNC?
a. Run-length encoding
b. Raw encoding
c. Delta encoding
d. JPEG encoding
Answer: b. Raw encodingwikipedia+1
Which feature allows clipboard sharing in some VNC implementations?
a. RDP protocol
b. RFB protocol extension
c. API function call
d. SSH tunnel
Answer: b. RFB protocol extensioncbtnuggets
For every display number N, which port does VNC typically use?
a. 5900+N
b. 22+N
c. 8080+N
d. 443+N
Answer: a. 5900+Nheimdalsecurity+2
Which term best describes VNC’s architecture?
a. Peer-to-peer
b. Client-server
c. Mesh network
d. Ad-hoc network
Answer: b. Client-serveraxissecurity+2
Who sends keyboard and mouse events in a VNC session?
a. Server
b. Client
c. Firewall
d. Switch
Answer: b. Clientmit+2
Which VNC variant is known for strong security features?
a. UltraVNC
b. RealVNC
c. TigerVNC
d. TightVNC
Answer: c. TigerVNCdevopsschool+1
What is transmitted during each screen update in VNC?
a. Pixel rectangles
b. Database records
c. Log files
d. Network packets
Answer: a. Pixel rectangleswirexsystems+2
When does a VNC session typically terminate?
a. On system reboot
b. When network drops
c. When either client or server disconnects
d. Daily at midnight
Answer: c. When either client or server disconnectswirexsystems
Which protocol is used to secure VNC communication?
a. SSL/TLS
b. DNS
c. FTP
d. ICMP
Answer: a. SSL/TLScotocus+2
What display environment does VNC provide access to?
a. Command line interface
b. Graphical desktop environment
c. BIOS setup
d. Network configuration menu
Answer: b. Graphical desktop environmentappliedglobal+2
Which major encoding type is used to reduce transmission size in VNC?
a. Tight encoding
b. Raw encoding
c. JPEG encoding
d. Delta encoding
Answer: a. Tight encodingwirexsystems
What is the role of the VNC server?
a. Initiates remote connection
b. Shares screen and processes inputs
c. Encrypts network traffic
d. Handles email transmission
Answer: b. Shares screen and processes inputsappliedglobal+2
Which port does browser-based VNC typically use?
a. 5800
b. 22
c. 3389
d. 443
Answer: a. 5800heimdalsecurity+1
VNC is most suitable for which environments?
a. Cross-platform remote support
b. Real-time gaming
c. Bulk data transfer
d. Streaming services
Answer: a. Cross-platform remote supportnordlayer+2
What is a disadvantage of VNC over low-bandwidth networks?
a. High latency with screen updates
b. Multiple network hops needed
c. No support for keyboard input
d. Incompatible with Linux
Answer: a. High latency with screen updatescbtnuggets+1
What does “headless” VNC server refer to?
a. Server without physical display
b. Client-only configuration
c. No authentication provided
d. Server on test network
Answer: a. Server without physical displaywikipedia
In which scenario is VNC least recommended?
a. Remote troubleshooting
b. Secure banking
c. Remote admin of servers
d. Academic collaboration
Answer: b. Secure bankinglinkedin+1
What distinguishes VNC from SSH or Telnet access?
a. Graphical remote control
b. Text-only access
c. Root access required
d. Limited to Linux systems
Answer: a. Graphical remote controlappliedglobal+2
Which of these VNC variants only supports Linux as a client?
a. Remmina
b. UltraVNC
c. RealVNC
d. Vinagre
Answer: a. Remminadevopsschool+1
Why is authentication critical in VNC setups?
a. Prevents unauthorized access
b. Improves graphics quality
c. Increases bandwidth
d. Reduces latency
Answer: a. Prevents unauthorized accesscotocus+2
What could VNC use for extra security besides password authentication?
a. VPN tunneling
b. IP fragmentation
c. Unsecured HTTP
d. IRC messaging
Answer: a. VPN tunnelingnordlayer+1
A user accessing a remote device via VNC can:
a. Perform all GUI actions as if local
b. Only monitor but not control
c. Only manage files
d. Only send chat messages
Answer: a. Perform all GUI actions as if localcbtnuggets+2
How do VNC clients negotiate connection capabilities?
a. During protocol handshake
b. Through DNS resolution
c. By sending emails
d. By command line flags only
Answer: a. During protocol handshakecbtnuggets
What is “clipboard sharing” in VNC?
a. Ability to copy and paste between local and remote system
b. Sharing graphic files only
c. Email forwarding
d. Password encryption
Answer: a. Ability to copy and paste between local and remote systemcbtnuggets
VNC is less suited for:
a. High-frame-rate video
b. Remote support
c. Multi-platform access
d. Basic desktop control
Answer: a. High-frame-rate videowirexsystems+1
What feature helps VNC work even on old or low-performance hardware?
a. Lightweight architecture
b. GPU acceleration
c. IPv6 requirement
d. Block-level image transfer
Answer: a. Lightweight architectureappliedglobal
Which is a common use case for VNC in 2025?
a. Managing IoT devices with GUI
b. Smartphone text messaging
c. AR gaming environments
d. Blockchain mining
Answer: a. Managing IoT devices with GUIkaaiot+1
What is one main difference between VNC and RDP?
a. VNC is platform-agnostic, RDP is Windows-centric
b. VNC is text-based, RDP is graphical
c. RDP uses UDP, VNC uses TCP
d. RDP is only for servers
Answer: a. VNC is platform-agnostic, RDP is Windows-centriclinkedin+1
Which of the following can be a server for VNC?
a. Raspberry Pi
b. Desktop PC
c. Virtual machine
d. All of the above
Answer: d. All of the aboveaxissecurity+2
Which VNC variant is known for best compression algorithms?
a. TightVNC
b. UltraVNC
c. TigerVNC
d. RealVNC
Answer: a. TightVNCdevopsschool+1
What is a “framebuffer” in the context of VNC?
a. Portion of memory containing graphical image
b. Temporary file storage
c. Network buffer for packets
d. Dedicated email server
Answer: a. Portion of memory containing graphical imagemit+2
What can restrict VNC access for security?
a. Firewall rules and authentication
b. FTP transfer
c. DNS forwarding
d. Disabling copy-paste
Answer: a. Firewall rules and authenticationnordlayer+2
VNC session data can be encrypted by:
a. SSL/TLS protocols
b. IPv6 addressing
c. Telnet sessions
d. WinRM agent
Answer: a. SSL/TLS protocolscotocus+2
What challenge may arise in using VNC over the Internet?
a. Exposed to interception if not encrypted
b. Instant automatic updates
c. DNS poisoning
d. Email spam
Answer: a. Exposed to interception if not encryptedcotocus+2
HTML5 VNC clients allow connections via:
a. Modern web browsers
b. Telnet command line
c. SSH terminal
d. NAS storage
Answer: a. Modern web browsersheimdalsecurity+1
Which protocol is used for addressing in VNC communication?
a. IP (Internet Protocol)
b. SMTP
c. POP3
d. ARP
Answer: a. IP (Internet Protocol)attack.mitre+1
What type of connection does VNC establish for data transport?
a. Reliable, connection-oriented
b. UDP multicast
c. Stateless, event-driven
d. Peer-to-peer
Answer: a. Reliable, connection-orientedwirexsystems
Which session action is possible in VNC?
a. Disconnect and release resources
b. Create email forwarding
c. Run cron jobs
d. Minimize bandwidth with UDP
Answer: a. Disconnect and release resourceslinkedin+1

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