BinTec X3200, Руководство пользователя

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X3200 User’s Guide 229
Basic IP settings
6
Proceed as follows to enter the system time in X3200 manually:
➤
Go to S
YSTEM
➧
T
IME AND
D
ATE
.
➤
Enter New Time.
➤
Enter New Date.
➤
Confirm the new system time with SET.
Current Time: shows the new system time set in X3200 .
6.3.2 Name Resolution in X3200 with DNS Proxy
Why Name Resolution?
IP address = ? Name resolution is necessary for converting host names in a LAN or on the In-
ternet into IP addresses. For example, if you would like to reach the host
"Goofy" in your LAN (e.g. with telnet or ping) or enter the
➤➤
URL "http://
www.bintec.de" in your Internet browser, you need the associated IP address
before you can set up the required connection. The following options are avail-
able:
■
DNS (Domain Name Server):
A DNS stores the relevant IP addresses for host names in the form of DNS
records and resolves the names if a relevant request is received, i.e. the
name server sends a DNS record with the IP address associated with the
name to the source of the request. Name servers form a hierarchical tree
structure. If a name server cannot resolve a name, it therefore asks a high-
er-order name server, etc.
■
HOSTS files (see chapter 3.7.2, page 67 ):
HOSTS files are located on the PCs in the LAN. You can use these files to
create a table of host names with the associated IP addresses. This means
connections to DNS are no longer needed to resolve these names. As the
If a method for automatically deriving the time is defined in X3200 , the values
obtained in this way automatically have higher priority. That is, if X3200
receives a relevant time signal (e.g. from a time server), any system time
entered manually is overwritten.