ITN 200 Mod 8

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 PTR record

Leisl configures multiple WINS servers on her organization's network. She wants the WINS servers to be able to share the NetBIOS records with each other. Which of the following features should Leisl use?

A replication partner

You are the administrator for an Active Directory domain and have been tasked with improving the response time for resolving DNS queries for resources in a second company-owned domain that does not use Active Directory. What type of zone can be used to accomplish this task with minimal overhead?

A stub zone

What resource record type defines an IPv6 host address in DNS?

AAAA record

Which of the following organizations does not need to install a WINS server?

An organization that has disabled NetBIOS on its computers

Carlos is configuring a DHCP server in his organization. Some of the computers in his organization contain manually configured IP addresses. Currently, he is setting up the new server to configure IP addresses for users who operate their mobile devices on the organization's network. Which of the following decisions should Carlos reevaluate?

Carlos sets the lease duration to 7 days.

How do you resolve a DNA-related problem caused by an invalid DNS cache entry?

Clear entries inside the DNS cache by running the Clrat-DnsClientCache command in Windows PowerShell.

Radha is using nslookup to troubleshoot DNS-related issues on SERVER1. She uses the command prompt and types in the statement nslookup servery.zone1.com. SERVER1 returns an incorrect result. If SERVER1 is non-authoritative for this lookup, what should Radha do to resolve this issue?

Clear the DNS Server cache, and clear the DNS cache on the resolver

What is the first step in troubleshooting an issue where a single computer is unable to lease an address?

Confirming that the computer has a physical connection to the network

Dev is configuring the DHCP server in his organization. He wants to restrict some computers from obtaining an IP lease from the DHCP. How can he achieve this?

Enable the subfolder and select more action options, then list the MAC addresses of computers that will be allowed.

Fan configures fault tolerance using two DHCP servers for his organization's network. How can he prevent the two DHCP servers from independently issuing duplicate IP address leases for a network?

Ensure both DHCP servers' scopes are set in a different IP address range.

For zones that allow dynamic updates, you do not need to create CNAME and MX records or host records that provide for round robin or netmask ordering.

False

If there are multiple DHCP servers on a network, DHCP clients will accept the first offer that they receive.

False

Explain the DHCP lease process.

First, the client sends a DHCP request to the DHCP server, next DHCP server sends back an offer packet, and then the DHCP client accepts the offer via DHCP request packet after the DHCP server sends an acknowledgment packet, last client configures IP configuration.

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?

Install a WINS server

Which of the following is true of WINS?

It can only resolve NetBIOS names to IPv4 addresses.

Christopher sets up multiple WINS servers in his organization and configures users' computers to use the WINS server. During testing, he attempts to access a folder called Share on the computer SERVERA. He enters the following statement into File Explorer: \\serverA\share. However, Christopher is unable to access the shared folder. What is the most likely reason for this issue?

SERVERA does not have a NetBIOS name record on any WINS server.

Identify a vital service provided by secondary DNS servers.

Secondary DNS servers respond to DNS lookup requests using read-only zone files.

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?

Some of the resource records for N2001EY will be made available for scavenging after 28 days.

What is the difference between stub zones and conditional forwarders?

Stub zones allow DNS servers to access another zone in a separate DNS server zone via stored NS and host records. Conditional forwarders also allow DNS servers the ability to access other zones but instead store the conditional forwarder in a folder, rather than an additional forward lookup zone.

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?

The DNS server and DHCP server are in different domains

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?

The IP addresses were configured manually.

Felicia is drafting an email to her colleague Rhonda. After Felicia types out the email, she enters the email address [email protected] and clicks Send. Felicia's email server uses the email address typed to locate the recipient email server. Which DNS resource record for zoneA.com allows Felicia's email server to locate the recipient email server?

The MX record

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?

The NS record

Aspen sets up the round robin feature in DNS for an FQDN server, server.domainA.com. She creates two identical Web servers with IP addresses 192.168.1.75 and 172.6.0.15 and associates two A records on the FQDN server with these IP addresses. The first A record is associated with the Web server having the IP address 192.168.1.75, and the second A record is associated with the Web server having the IP address 172.6.0.15. Aspen uses a client with the IP address 172.6.0.95 to perform a forward lookup of server.domainA.com. Which of the following is true of this scenario?

The client will contact the Web server with the address 172.6.0.15.

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?

The organization contains DHCP relay agents in different locations.

Why do organizations configure default forwarders?

To create a pool of DNS lookups that are not found on the organization's DNS server or associated with an authoritative zone or conditional forwarder.

What is the use of group NetBIOS name records?

To resolve computers located in a LAN via NetBIOS name and IP address. Typically used to locate legacy systems.

The subnet mask cannot be modified once a scope is created.

True

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

Tuyet types the following statement into File Explorer: \\serverA\Share1. The NetBIOS name is resolved by a WINS server, and Tuyet is able to access the shared folder. After this interaction with the WINS server, Tuyet does not perform any other operations that requires her computer to interact with the WINS server for over a week. Which of the following is true of this scenario?

Tuyet's computer's name record will be deleted from the WINS server.

You are a system administrator and all the computers on your organization's network are unable to lease addresses from the DHCP servers. How will you fix this issue?

Verify that the DHCP server is actively running, ensure DHCP is authorized, and scopes are activated.

Which of the following is the most likely cause for missing resource records in a secondary zone?

Zone transfer issues

Danielle creates a new scope, Sales LAN, for a DHCP server in her organization. She wants to assign an IP address to a printer in the sales department. Which of the following folders should Danielle use to configure this option?

Reservations

Reno is facing some DNS server issues that he is unable to resolve using nslookup, DNS manager, and other general methods. He decides to use information from the DNS Server log to identify the issue. However, the information that was logged is insufficient to resolve the issue. Reno is able to identify the issue after enabling debug logging. What should Reno do next?

Reno should turn off debug logging.

In the context of DHCP, why do organizations use MAC address filtering?

Mitigates computers from using IP lease from a DHCP server, preventing any organization's Ip from being assigned to a DHCP server.

What information must be provided in order to configure an IPv6 DHCP scope?

Must specify an IPv6 network prefix along with scope name, IP address range, IP address exclusions, lease duration, DHCP options, default gateway, domain/server name, and WINS server information.