Master, slave, transfer, subdomain, and delegated Lab Manual for DNS under CentOS

DNS master, slave, transfer, subdomain, and delegate lab manuals: before doing the experiment, you must first understand the following concepts 1. what is DNS? DNS stands for the Domain Name System (DomainNameSystem). Simply put, it resolves a domain name into an IP address. 2. what types of DNS are there? Primary Domain Name Server & n

DNS master, slave, transfer, subdomain and assignment Lab Manual

Cutting-edge: understand the following concepts before doing experiments:

1. what is DNS?

DNS stands for the Domain Name System. Simply put, it resolves a Domain Name into an IP address.

2. what types of DNS are there?

Primary domain name server

Secondary domain name server

Forwarding domain name server

Cache domain name server

3. what types of DNS queries are available?

The query methods are divided into recursive queries (either query succeeded or query failed) and Iterative queries (query another DNS process from one DNS)

The query content can be divided into forward query (the IP address query process by domain name) and reverse query (the domain name query process with IP addresses)

4. what steps are the DNS resolution sequence generally divided?

First query the DNS cache, then query the Hosts file, and finally query the DNS server.

5. What are the following DNS forwarding rules?

Forward the query that cannot be resolved by the local DNS server to other DNS servers on the internet. This DNS server is designated as a forwarder and the query by The forwarder is a recursive query.

6. what is the role of the DNS secondary domain name server?

When the primary server is shut down, there is a fault or the load is too heavy, the secondary domain name server provides the domain name resolution service as a backup.

7. What are the following delegation concepts?

When there are too many subdomains in the region, it is inconvenient to maintain them. if you encounter a domain name query bottleneck, you can assign the subdomains to other servers for maintenance by submitting a new deployment committee in the region.

8. What are the differences between subdomain names and delegates?

The subdomain file is in the parent file.

Assign an independent regional File

Lab (1)

Lab name:Build and test the primary DNS

Lab purpose: Familiar with primary DNS setup and client testing

Lab topology: