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Description
Flashcards by Rick Schoenman, updated more than 1 year ago
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Created by Rick Schoenman
about 3 years ago
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| Question | Answer |
| What is a DNS zone? | A specific portion of the DNS namespace. A zone contains resource records, and it responds to queries for records in that namespace. |
| In which 2 ways can a DNS server store it's zones? | - In a file - In AD DS database |
| On a DNS servers, which is also an AD DS domain controller, can you store the DNS database in a file as well? | No, when the DNS server is also a domain controller, you can only store the database in AD DS. |
| What are some limitations when storing the DNS zone in a file? | - The file is in a local folder on the server - Only one copy of the file is writable - Other copies, which are read-only, are known as seconday zones |
| Describe a forward lookup zone | This zone hosts the most common DNS resource records, A-records. An A-record is used to resolve a hostname to an IP address. |
| When using AD DS in your network, what is created in DNS? | A forward lookup zone that corresponds to the AD DS domain name. AD DS stores resource records in DNS that are used to locate network services. |
| Should you store DNS records regarding AD DS resource information in a public or private DNS zone? | In a private DNS zone. This information should never be stored in a public DNS zone. |
| When using Windows Server DNS, how can you make a DNS zone accessible for internet facing clients? | Host the DNS zone on a server that is accessible on the internet. |
| Describe reverse lookup zones | Reverse lookup zones are used to resolve IP addresses to names |
| Which reverse lookup zones should you create? | You should create reverse lookup zones for all the internal IP address ranges that you use |
| What is the difference between primary and secondary zones? | A primary zone is used to process changes, and is therefore writable. A secondary zone is a read-only copy of a primary zone. |
| In which 2 places can you store a primary DNS zone? | - Active Directory - File |
| How is a DNS zone that is stored in Active Directory called? | An Active Directory-Integrated zone |
| What is a feature that is enabled by using an Active Directory-Integrated zone? | Secure Dynamic Updates |
| What are DNS records? | The resource records that are stored in DNS zones |
| Which 2 records do forward and reverse lookup zones contain? | - Start of Authority (SOA) - Name Server (NS) |
| Describe the Start of Authority (SOA) record | Contains information for the zone, including: - The name of the primary DNS server - Synchronization interval There is one SOA record per zone |
| Describe the Name Server (NS) record | Identifies a DNS server for the domain. There is a NS record for each DNS server that has a copy of the zone. |
| Describe the Host (A) record | Resolves a name to an IPv4 address |
| Describe the Host (AAAA) record | Resolves a name to an IPv6 address |
| Describe the Alias (CNAME) record | Used to resolve a name to another name |
| Describe the Service Location (SRV) record | Used by applications to identify the locations of a server that hosts a certain application. Example: AD DS uses SRV records to identify the location of Domain Controllers |
| Describe the Mail Exchanger (MX) record | Used to identify mail servers for a domain |
| Describe the Text (TXT) record | Used to store a string in DNS |
| Describe a Pointer (PTR) record | Used to resolve an IP address to a name. Example: resolve 172.168.35.105 to srv-01.contoso.com The PTR record would be named 105 and would be stored in the reverse lookup zone 35.168.172.in-addr.arpa |
| What is Time To Live in DNS? | All resource records are configured with a TTL. This defines the amount of time that a client is allowed to cache a certain record. |
| When troubleshooting DNS, what are 2 common actions to take? | - Clear DNS cache on client - Clear DNS cache on Domain Controller |
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