SENA PS400 - Manual (Page 23)

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communicate with the hosts outside the local network environment. For correct information on the
gateway IP address, please refer to the network administrator.
--- > 4
Enter default gateway: 192.168.1.1[ENTER]
Figure 3-4. Setting the default gateway in Static IP mode
3.1.4 Primary and Secondary DNS
When users want to visit certain website, the computer asks a Domain Name System (DNS) server for
the correct IP address of the web site, and the computer uses the answer to connect to the web server.
DNS is the way that Internet domain names are identified and translated into IP addresses. Domain
name is the form of alphanumeric name such as sena.com and it is usually easier to remember. A
DNS server is a host that can translate such text-based domain names into the numeric IP addresses
for TCP/IP connection.
In order to use this DNS feature of the HelloDevice Pro Series, users need to set the IP address of this
DNS server to be able to access the host with the domain name. The HelloDevice Pro Series provides
the way to configure IP addresses of DNS servers, i.e. Primary DNS server, Secondary DNS server.
A secondary DNS server is specified for use when the primary DNS server is unavailable.
--- > 5 (or 6)
Enter primary (or secondary) DNS server: 211.112.43.133[ENTER]
Figure 3-5. Setting the DNS servers in Static IP mode
3.2 DHCP
3.2.1 Overview
Dynamic Host Configuration Protocol (DHCP) is a communications protocol that lets network
administrators manage and automate the assignment of IP addresses centrally in an organization's
network. DHCP lets a network administrator supervise and distribute IP addresses from a central point
and automatically send a new IP address when a computer is plugged into a different place in the
network.
As described in the section 3.1, the IP address must be entered manually at each computer in Static
IP mode and, if computers move to another location in another part of the network, a new IP address
must be entered. Meanwhile, all the parameters including the IP address, subnet mask, gateway, DNS