DNS and DHCP MCQ Test: Networking Services Simplified
Questions: 30
Questions
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1. What does DNS stand for?
- a) Domain Network Service
- b) Domain Name System
- c) Digital Network System
- d) Distributed Name System
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2. Which of the following is the primary function of DNS?
- a) To assign IP addresses to devices
- b) To resolve domain names to IP addresses
- c) To secure network traffic
- d) To manage network traffic
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3. What is the role of a DNS resolver?
- a) To store IP addresses for quick access
- b) To send requests to authoritative DNS servers
- c) To block harmful websites
- d) To route domain names to DNS servers
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4. Which DNS record type maps a domain name to an IPv4 address?
- a) A record
- b) AAAA record
- c) MX record
- d) CNAME record
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5. What does the "MX" record in DNS represent?
- a) Mail Exchange record
- b) Master Exchange record
- c) Multiple Extension record
- d) Media Exchange record
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6. What type of DNS record is used to associate a domain name with an IPv6 address?
- a) A record
- b) AAAA record
- c) CNAME record
- d) PTR record
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7. Which protocol does DNS primarily use for communication?
- a) TCP
- b) UDP
- c) HTTP
- d) FTP
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8. What is a DNS cache used for?
- a) To store domain names for future queries
- b) To block unwanted traffic
- c) To encrypt DNS queries
- d) To filter IP addresses
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9. What is the purpose of a DNS server?
- a) To store and manage the domain name database
- b) To monitor network security
- c) To route data packets between networks
- d) To perform encryption
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10. Which type of DNS query is made when a user directly requests an IP address for a domain?
- a) Iterative query
- b) Recursive query
- c) Non-recursive query
- d) Forward lookup
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11. Which of the following is a DHCP message type that is sent by a client to request an IP address from a DHCP server?
- a) DHCP Discover
- b) DHCP Offer
- c) DHCP Request
- d) DHCP Acknowledge
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12. What is the purpose of DHCP relay agents?
- a) To relay DHCP messages between clients and servers
- b) To route traffic between different subnets
- c) To block unauthorized IP address assignments
- d) To handle DNS queries
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13. What is a DHCP scope?
- a) A set of available IP addresses that a DHCP server can assign
- b) A list of DHCP servers in the network
- c) A method for encrypting DHCP traffic
- d) A technique for segmenting the network
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14. What happens when a DHCP server cannot assign an IP address due to a lack of available addresses?
- a) The client receives a default IP address
- b) The client will be assigned a private IP address
- c) The client cannot access the network
- d) The DHCP server will continue to attempt to assign an address
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15. What is the purpose of a DHCP Reservation?
- a) To ensure a specific device always receives the same IP address
- b) To assign a temporary IP address to devices
- c) To restrict access to a network based on IP address
- d) To automatically configure DNS settings
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16. What does the term "DNS poisoning" refer to?
- a) Corrupting the DNS cache with incorrect IP address information
- b) Encrypting DNS traffic
- c) Filtering DNS queries to block malicious sites
- d) Assigning incorrect IP addresses to devices
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17. Which of the following is an advantage of using DHCP over static IP assignment?
- a) Reduces manual configuration and errors
- b) Ensures greater security for network traffic
- c) Requires less bandwidth for IP assignment
- d) Assigns IP addresses faster
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18. What is the purpose of DNS recursion?
- a) To search for the IP address associated with a domain name across multiple DNS servers
- b) To filter malicious DNS queries
- c) To monitor DNS traffic
- d) To configure DNS settings on devices
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19. What is the primary function of a CNAME record in DNS?
- a) To alias one domain name to another
- b) To map a domain name to an IP address
- c) To assign a specific mail server for a domain
- d) To associate a domain name with an IPv6 address
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20. How can DNS security be enhanced to prevent DNS attacks?
- a) By implementing DNSSEC (DNS Security Extensions)
- b) By disabling DNS caching
- c) By using static DNS records only
- d) By restricting DNS queries to internal users only
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21. What is the main advantage of using DHCP over manual IP address configuration?
- a) Simplifies network management by automating IP address allocation
- b) Provides more security by assigning unique IP addresses
- c) Reduces the chances of IP conflicts
- d) Speeds up network traffic
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22. Which of the following tools is used for testing and troubleshooting DNS?
- a) ipconfig
- b) nslookup
- c) ping
- d) traceroute
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23. What type of DNS record is typically used for load balancing across multiple servers?
- a) A record
- b) CNAME record
- c) MX record
- d) SRV record
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24. What does a DNS TTL (Time to Live) value indicate?
- a) The time duration for which DNS information is cached
- b) The number of DNS servers in a query
- c) The time it takes for DNS queries to be resolved
- d) The priority level of a DNS record
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25. What happens when a DHCP lease expires?
- a) The device loses its assigned IP address and must request a new one
- b) The device retains the IP address until the server is reset
- c) The device is automatically assigned a new static IP address
- d) The device will continue using the same IP address without interruption
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26. What is an authoritative DNS server?
- a) A server that provides the definitive answer to DNS queries for a domain
- b) A server that filters unwanted DNS requests
- c) A server that handles DNS caching
- d) A server that blocks specific websites
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27. What is a key feature of Dynamic DNS (DDNS)?
- a) It allows automatic updating of DNS records when IP addresses change
- b) It prevents DNS caching
- c) It improves DNS query performance
- d) It resolves DNS errors automatically
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28. Which of the following best describes the role of a DHCP client?
- a) To request an IP address from the DHCP server
- b) To assign static IP addresses to devices
- c) To filter DNS queries
- d) To act as a DNS resolver
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29. How does a DNS resolver function in the context of a recursive query?
- a) It queries multiple DNS servers until it gets an authoritative response
- b) It stores DNS records locally for faster lookup
- c) It sends requests to only local DNS servers
- d) It filters DNS requests based on security rules
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30. What is the primary function of a DNS forwarder?
- a) To send DNS queries to another DNS server for resolution
- b) To block malicious DNS queries
- c) To encrypt DNS queries
- d) To perform DNS lookups locally
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