NOS 230 Module 8 Quiz

When some computers have incorrect address information, you should check for the presence of unauthorized DHCP servers on the network running a non-Windows operating system and remove them if found. True False

False

Kaya is an administrator at Kelvin Computing. Benjamin, a user, wants to access a shared folder on SERVERA, so he uses the UNC \\servera\share to access the folder. His computer then sends out a broadcast to the network to resolve the name SERVERA. Because of the broadcast, all computers on the LAN interpret it and causes additional processing that interferes with other operations. What can Kaya do to avoid this additional overhead? a. Install a WINS server b. Restart the DNS Server c. Configure a default forwarder d. Configure a conditional forwarder

a

Which of the following is the most likely cause for missing resource records in a secondary zone? a. Zone transfer issues b. An invalid entry in the DNS cache c. Zones that allow dynamic updates d. Manual DNS cache flushing

a

Identify a vital service provided by secondary DNS servers. a. Secondary DNS servers contain read-write copies of a primary DNS server's data. b. Secondary DNS servers respond to DNS lookup requests using read-only zone files. c. Secondary DNS servers improve security by preventing access to primary DNS servers. d. Secondary DNS servers divert all traffic to primary DNS servers to reduce load.

b

Lashonda sets up a DNS server, SERVER1, with a forward lookup zone called domainA.com. It hosts the resource records for the domainX.com Active Directory domain. It contains host (A) records for two network interfaces on SERVER1 (172.16.0.10 and 192.168.1.50). The host records are associated with the FQDNs server1.domainA.com and domainA.com. There is also an SOA record and an NS record for the zone. Which of the following records identifies SERVER1 as an authoritative DNS server? a. The SOA record b. The NS record c. The A record for 172.16.0.10 d. The A record for 192.168.1.50

b

Raymond and Lin are facing network issues on their computers. Rayna, the administrator, is troubleshooting the issue. She notices that Raymond and Lin's computers are using the same IP address, 192.167.1.85. If the organization's network uses a DHCP server, which of the following most likely caused this issue? a .The IP addresses were configured automatically. b. The IP addresses were configured manually. c. The IP addresses were configured by the DHCP server. d. The IP addresses on both computers have expired.

b

You are troubleshooting a DHCP server and discover that it is not dynamically updating DNS records for DHCP clients. What is the most likely cause for this issue? a. The network contains computers with manually configured IP addresses. b. The DNS server and DHCP server are in different domains. c. The DNS server is an authoritative, primary DNS server. d. The DNS server and DHCP server are running on different operating systems.

b

Malia configures a primary zone on a DNS server to accept dynamic updates. Whenever a computer is added to the network, resource records for the computer are automatically created. For a computer, NX2001EY, Malia configures resource records manually. On the Zone Aging/Scavenging Properties window, she selects Scavenge stale resource records, sets the No-refresh interval to 14 days, and sets the Refresh interval to 14 days. She also enables automatic scavenging in the DNS server's properties. If Malia removes NX2001EY from the network, what is the most likely outcome in this scenario? a. The resource records for N2001EY will be deleted within 14 days. b. All the resource records for N2001EY will be made available for scavenging after 28 days. c. Some of the resource records for N2001EY will be made available for scavenging after 28 days. d. Malia will need to manually remove all the resource records for N20001EY.

c

Michelle is configuring a DHCP server in her organization. When creating a new scope, she is prompted to enter the subnet delay. She chooses to enter a few milliseconds of delay. If true, which of the following would justify this choice? a. The network contains other DHCP servers that lease IP addresses. b. The organization contains computers with manually configured IP addresses. c. The organization contains DHCP relay agents in different locations. d. The network contains DHCP servers configured in a DHCP failover configuration.

c

You are investigating strange traffic on your network and wish to resolve an IP address to a DNS name. What resource record should you use to perform a reverse lookup? a. An A record b. An AAAA record c. A PTR record d. A CNAME record

c