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Cisco Certified Network Associate (CCNA) Questions 516–520 (page: 105)

Updated On: 10-Feb-2026

What is the authoritative source for an address lookup?

  1. a recursive DNS search
  2. the operating system cache
  3. the ISP local cache
  4. the browser cache

Answer(s): A



Which command is used to verify the DHCP relay agent address that has been set up on your Cisco IOS router?

  1. show ip interface brief
  2. show ip dhcp bindings
  3. show ip route
  4. show ip interface
  5. show interface
  6. show ip dhcp pool

Answer(s): D



Which type of information resides on a DHCP server?

  1. a list of the available IP addresses in a pool
  2. a list of public IP addresses and their corresponding names
  3. usernames and passwords for the end users in a domain
  4. a list of statically assigned MAC addresses

Answer(s): A



What are two roles of Domain Name Services (DNS)? (Choose two.)

  1. builds a flat structure of DNS names for more efficient IP operations
  2. encrypts network Traffic as it travels across a WAN by default
  3. improves security by protecting IP addresses under Fully Qualified Domain Names (FQDNs)
  4. enables applications to identify resources by name instead of IP address
  5. allows a single host name to be shared across more than one IP address

Answer(s): D,E



Which Cisco IOS command will indicate that interface GigabitEthernet 0/0 is configured via DHCP?

  1. show ip interface GigabitEthernet 0/0 dhcp
  2. show interface GigabitEthernet 0/0
  3. show ip interface dhcp
  4. show ip interface GigabitEthernet 0/0
  5. show ip interface GigabitEthernet 0/0 brief

Answer(s): D



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