PLANET CS-2001 - Manual (Page 714)

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 IPv6 uses PTR record as well. For example, host33.nu.net.tw points to
FEC0::2AA:FF:FE3F:2A1C (FEC0:0000:0000:0000:02AA:00FF:FE3F:2A1C),
in pointer records of the reverse database, this IP address is stored as the domain
name C.1.A.2.F.3.E.F.F.F.0.0.A.A.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.C.E.F.IP6.INT.
pointing back to its designated hostname.
 For example, using the nslookup command to verify whether DNS lookup
functions normally. The process is as follows:
C:\>nslookup host1.nu.net.tw ----------->forward DNS lookup
Server: dns.hinet.net
Address: 168.95.1.1
Name：host1.nu.net.tw
Address：61.11.11.12
C:\>nslookup 61.11.11.12 --------------->reverse DNS lookup
Server: dns.hinet.net
Address: 168.95.1.1
Name：host1.nu.net.tw
Address：61.11.11.12
The result points out that 61.11.11.12 points to host1.nu.net.tw
Load Balancing Mode
 Round-Robin: According to the set weight and priority, the access is distributed
in a cyclic fashion over the available links.
 Redundancy: This mode only functions when one of the links gets disconnected.