Dns (Domain Name Service); Dsl (Digital Subscriber Line) - Efficient Networks SpeedStream 5100 Series User Manual

Efficient router user guide
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you have configured a specific set of IP addresses for the DHCP server, then you change the Ethernet
IP address to something that is on a different subnet than your DHCP server's addresses, and you do
not reboot, the router will not recognize the change. The DHCP server will not be able to hand out
addresses. Be sure to reboot the router when you change the Ethernet IP address in this manner.

DNS (Domain Name Service)

The router supports Domain Name Service (DNS) that provides hostname-to-IP address resolution for
LAN-side clients. There are two distinct DNS functions provided by the router: the DNS resolver and
the DNS server.
DNS Resolver
The DNS resolver is the entity that creates a DNS request for transmission to a DNS server (which
may be co-located in the router or be an external DNS server). The DNS resolver is only used by
certain user interface commands that allow a hostname argument as well as an IP address argument.
The DNS resolver requires the user to configure a single DNS server IP address to which to direct
DNS requests. This IP address may be the router itself in the situation where the DNS server is
enabled on the router or it may be any reachable IP address at which a DNS server is available.
DNS Server
The DNS server is the entity that responds to DNS requests. The DNS server provides IP address-to-
hostname resolution and hostname-to-IP address resolution for LAN clients via DNS requests. The
DNS server also supports hostname-to-IP address resolution for user interface commands where
appropriate in response to requests submitted by the DNS resolver.
The DNS server is enabled by default from the factory and provides the router with the default
hostname "ENI-Router".

DSL (Digital Subscriber Line)

DSL describes a family of digital services provided by local telephone companies to local subscribers.
There are many forms of DSL: Asymmetric DSL (DSL), Symmetric (or single pair) DSL (SDSL),
and many others. The router supports DSL, which provides rates of up to 6 Mbps downstream from
the customer and up to 640 Kbps upstream from the customer. DSL can carry voice and data signals
at the same time in both directions.
Encapsulation Methods: PPP and RFC 1483
The 5600 series router transmits data via ATM Virtual Channels (VCs). The data is encapsulated
using methods Point-to-Point Protocol (PPP) or RFC 1483 encapsulation. A brief explanation of these
two encapsulation methods follows.
ICSA 3.0a-compliancy
ICSA Labs, a division of TruSecure Corporation, tests and defines firewall security criteria, providing
certification to products that meet their exacting standards. For more information, go to
http://www.icsalabs.com/html/communities/firewalls/index.shtml.
SpeedStream Router User Guide
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