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Chapter 3 89
Using E5810 Web Access
Viewing and Modifying Configuration
Domain Name
Server (DNS)
(cont)
[0.0.0.0]
A DNS Server is an Internet service that translates domain names into IP
addresses. Every time you use a domain name, a DNS server must
translate the name into the corresponding IP address. For example, the
domain name
www.example.com might translate to 198.105.232.4.
The DNS system is distributed. If one DNS server does not know how to
translate a particular domain name, it asks another DNS server, etc. until
the correct IP address is returned. If DHCP is used, a DHCP Server may
provide a DNS Server IP address to the E5810 (this is transparent to the
user). If the user configures a DNS Server, the E5810 will try to use that
Server first.
This parameter shows the IP address of the domain name Server. More
than one address may be listed on the
Current Configuration of the E5810
LAN/GPIB Gateway
page. Up to two of these values may have been
returned by the DHCP Server during startup. Only one static value can be
input on the
Configuring your E5810 LAN/GPIB Gateway page.
The DNS Server provides a Hostname, given an IP Address, for a LAN
device based on entries in its DNS lookup table. If DHCP is OFF and you
do not specify a DNS Server or if Dynamic DNS is not available on your
enterprise LAN and your IP Address is not in the DNS lookup table on the
DNS Server, your Hostname will be unknown and you must address the
E5810 only by its IP Address. The Hostname is not a required entry.
Dynamic Host
Configuration
Protocol (DHCP)
[ON]
DHCP is a protocol for assigning dynamic IP addresses to devices on a
network. DHCP supports a mix of static and dynamic IP addresses. The
two options for DHCP are ON (default) or OFF.
DHCP ON (Default): If DHCP is ON (the factory default setting), the E5810
will try to obtain an IP address from a DHCP Server. If this fails, the
E5810 will use its static IP address. If DHCP is ON and a DHCP Server is
found, the manually configured IP Address, Subnet Mask, and Default
Gateway parameters are not used by the E5810 during startup and thus
are not required settings.
Parameter
[Default]
Description