【 Weak current College 】 Windows network services summary (2)

The new zone
1. main area: the master copy of the new region, is responsible for the newly created regional computer management and maintenance of this zone resource records
2. secondary zones: a copy of an existing zone, the main area of the DNS server will put the zone information is passed to the secondary DNS server in the
3. a stub zone: include is used to represent the authoritative DNS servers for that zone resource records required
Dynamic updates: when a DNS client as changes occur, you can use the DNS server to register and dynamically update their resource records with.
Key resource records


Forwarders
1. the local DNS server to forward unresolved queries to other DNS on the network server, the DNS server that is designated as a forwarder
2. forward the query to the forwarder as recursive queries



3. configure forwarders
A) suppose the local DNS server's IP address is 192.168.1.2
B) forwarder IP addresses as a 192.168.1.11
C) is in the local DNS server configuration



DNS zone transfer
1. the secondary zones you can realize the region's availability and fault tolerance
2. improves query the regional availability and fault tolerance
3. the regional transport
A) adds a zone file replication to multiple servers process
B) from the main server zone files copied to secondary server
4. zone file replication
A copy of all the zone file)
B) incremental zone file replication
Subdomain
1. in the area you can create a child domain to extend the domain name space
For example:
In the area "create subdomains benet.com.cn" sh "," benet.com .cn represents the Shanghai Branch of domain name
2. all the records in which the child is stored in the parent zone file
Delegate
1. the area of subdomain too much, it is not convenient to maintain, and encounter the domain name query of bottlenecks
2. the adoption in the area of the new delegation can add subdomain to another server maintenance
3. comparison with delegated subdomain



Follow the prompts (iterative queries)
Root hints enable non-root domain DNS server can look for the root domain DNS server



Domain name resolution order
1. in order to resolve domain names
A) native DNS cache
B) native Hosts file
C) DNS server
2. the local DNS cache
a)Ipconfig/displaydns
b)Ipconfig/flushdns
3. the local Hosts file
A) Hosts file%SystemRoot%\system32\drivers\etc
B) Hosts file format
DNS troubleshooting
1. client settings
1) check the client's preferred DNS server is configured
2) configuration of DNS server IP address is correct
2.DNS server resource records
1) check the DNS server has the correct domain name and host record that you want to find
2) using nslookup
3.DNS service is started
4. the resolution of IP not correct
A) Hosts file
1. the client Hosts file before the DNS service in General resolved domain name
2.Hosts file has an incorrect host records



B) native DNS cache
1. native DNS cache temporarily cached the old records
2. the "ipconfig/flushdns" clear native DNS cache