1. What does DNS stand for?
A) Dynamic Network Service
B) Domain Name System
C) Digital Network System
D) Distributed Network Service
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2. What is the primary function of DNS?
A) Translate domain names to IP addresses
B) Encrypt web traffic
C) Assign IP addresses to devices
D) Route network packets
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3. Which port does DNS primarily use?
A) Port 80
B) Port 25
C) Port 53
D) Port 443
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4. What does DHCP stand for?
A) Domain Host Control Protocol
B) Dynamic Host Configuration Protocol
C) Digital Host Communication Protocol
D) Distributed Host Control Protocol
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5. What is the primary function of DHCP?
A) Automatically assign IP addresses
B) Translate domain names to IP addresses
C) Secure network communications
D) Route network packets
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6. How many steps are in the DHCP process?
A) 2
B) 3
C) 4
D) 5
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7. What is remote logging or TELNET used for?
A) Remote access to devices
B) File transfer
C) Email communication
D) Web browsing
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8. Which port does TELNET use?
A) Port 21
B) Port 23
C) Port 25
D) Port 80
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9. Which protocol is a secure alternative to TELNET?
A) FTP
B) HTTP
C) SSH
D) SMTP
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10. What does SMTP stand for?
A) Simple Mail Transfer Protocol
B) Secure Mail Transport Protocol
C) Standard Mail Transfer Protocol
D) System Mail Transfer Protocol
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11. What is the primary function of SMTP?
A) Receiving email
B) Sending email
C) Storing email
D) Encrypting email
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12. Which port does SMTP use?
A) Port 21
B) Port 23
C) Port 25
D) Port 80
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13. What does POP3 stand for?
A) Post Office Protocol version 3
B) Protocol for Online Posting version 3
C) Public Online Protocol version 3
D) Personal Online Protocol version 3
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14. What does IMAP stand for?
A) Internet Mail Access Protocol
B) Internet Message Access Protocol
C) Internal Mail Access Protocol
D) Internet Mail Application Protocol
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15. What is the main difference between POP3 and IMAP?
A) POP3 is more secure
B) IMAP is for sending emails
C) IMAP keeps emails on the server
D) POP3 supports attachments
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16. What does FTP stand for?
A) File Transfer Protocol
B) Fast Transfer Protocol
C) File Transmission Protocol
D) File Transport Protocol
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17. Which port does FTP use for control connections?
A) Port 20
B) Port 21
C) Port 22
D) Port 23
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18. Which protocol is a secure alternative to FTP?
A) SFTP
B) HTTP
C) SMTP
D) TELNET
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19. What does WWW stand for?
A) World Wide Web Protocol
B) World Wide Web
C) World Web Wide
D) Wide World Web
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20. What does HTTP stand for?
A) Hypertext Transport Protocol
B) Hypertext Terminal Protocol
C) Hypertext Transfer Protocol
D) Hypertext Transmission Protocol
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21. Which port does HTTP use?
A) Port 80
B) Port 21
C) Port 25
D) Port 53
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22. What does HTTPS stand for?
A) Hypertext Transfer Protocol System
B) Hypertext Transfer Protocol Secure
C) Hypertext Transport Protocol Secure
D) Hypertext Terminal Protocol Secure
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23. Which port does HTTPS use?
A) Port 80
B) Port 8080
C) Port 443
D) Port 8443
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24. What does SNMP stand for?
A) Simple Network Management Protocol
B) Secure Network Management Protocol
C) System Network Management Protocol
D) Standard Network Management Protocol
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25. What is the primary function of SNMP?
A) File transfer
B) Network management and monitoring
C) Web browsing
D) Email communication
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26. What does IPSec stand for?
A) Internet Protocol Secure
B) IP Security Protocol
C) Internet Protocol Security
D) Internet Protection Security
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27. What is the primary function of IPSec?
A) Secure IP communications
B) Assign IP addresses
C) Route IP packets
D) Translate domain names
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28. What does VPN stand for?
A) Virtual Protocol Network
B) Virtual Private Network
C) Virtual Public Network
D) Virtual Protected Network
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29. What is the primary purpose of a VPN?
A) Create secure connections over public networks
B) Increase internet speed
C) Assign IP addresses
D) Translate domain names
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30. What is a firewall?
A) Encryption protocol
B) Authentication method
C) Network security device
D) Routing protocol
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31. What is the primary function of a firewall?
A) Filter network traffic
B) Encrypt data
C) Assign IP addresses
D) Translate domain names
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32. What is a packet-filtering firewall?
A) Examines application data
B) Examines packet headers
C) Examines user behavior
D) Examines network topology
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33. What is a stateful firewall?
A) Examines packet headers only
B) Examines application data
C) Tracks connection states
D) Blocks all traffic
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34. What is an application-level gateway?
A) Examines application-layer data
B) Examines packet headers only
C) Tracks connection states
D) Routes application traffic
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35. What is SSL/TLS used for?
A) File transfer
B) Secure communication
C) Network management
D) IP address assignment
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36. What is a digital certificate used for?
A) File encryption
B) Network routing
C) Identity verification
D) IP address assignment
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37. What is a Certificate Authority (CA)?
A) Issues digital certificates
B) Manages network traffic
C) Assigns IP addresses
D) Routes network packets
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38. What does PKI stand for?
A) Private Key Infrastructure
B) Public Key Infrastructure
C) Protected Key Infrastructure
D) Personal Key Infrastructure
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39. What characterizes symmetric encryption?
A) Uses different keys for encryption and decryption
B) Uses public and private keys
C) Uses the same key for encryption and decryption
D) Doesn't use keys
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40. What characterizes asymmetric encryption?
A) Uses different keys for encryption and decryption
B) Uses the same key for encryption and decryption
C) Doesn't use keys
D) Uses only one key
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41. What is a hash function?
A) Encryption algorithm
B) One-way function producing fixed-size output
C) Key generation method
D) Digital signature algorithm
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42. What is a digital signature used for?
A) Data encryption
B) Key exchange
C) Authentication and non-repudiation
D) Network routing
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43. What is a proxy server?
A) Intermediary between client and server
B) Backup server
C) Primary server
D) Authentication server
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44. What is a forward proxy?
A) Acts on behalf of servers
B) Acts on behalf of clients
C) Forwards all traffic
D) Blocks all traffic
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45. What is a reverse proxy?
A) Acts on behalf of servers
B) Acts on behalf of clients
C) Reverses all traffic
D) Blocks reverse traffic
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46. What is a load balancer?
A) Balances network load
B) Distributes requests across servers
C) Balances power consumption
D) Balances network traffic
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47. What does CDN stand for?
A) Central Data Network
B) Centralized Distribution Network
C) Content Delivery Network
D) Content Distribution Network
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48. What is the primary purpose of a CDN?
A) Improve content delivery speed
B) Encrypt content
C) Authenticate users
D) Route network traffic
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49. What is cloud computing?
A) Computing in the sky
B) On-demand access to computing resources
C) Weather prediction computing
D) Distributed computing only
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50. What are the three main cloud service models?
A) Public, Private, Hybrid
B) Small, Medium, Large
C) IaaS, PaaS, SaaS
D) Basic, Standard, Premium
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