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Wireless AC1750 Dual-band Gigabit Router
120
and high-density modulation (up to 256 QAM).
Channel
Channel
A communication channel, also known as channel, refers either
to a physical transmission medium such as a wire or to a logical
connection over a multiplexed medium such as a radio channel.
It is used to transfer an information signal, such as a digital bit
stream, from one or more transmitters to one or more receivers.
If there is only one AP in the range, select any channel you like.
The default is Auto.
If there are several APs coexisting in the same area, it is
advisable that you select a different channel for each AP to
operate on, minimizing the interference between neighboring
APs. For example, if 3 American- standard APs coexist in one
area, you can set their channels respectively to 1, 6 and 11 to
avoid mutual interference. Frequency interference rarely exists
over 5 G band, which has more channels and greater frequency
span.
SSID
SSID
Service set identifier (SSID) is used to identify a particular 802.11
wireless LAN. It is the name of a specific wireless network. To let
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your wireless network adapter roam among different APs, you
must set all Aps’ SSID to the same name.
WPA/WPA2
The WPA protocol implements the majority of the IEEE 802.11i
standard. It enhances data encryption through the Temporal Key
Integrity Protocol (TKIP) which is a 128-bit per-packet key,
meaning that it dynamically generates a new key for each packet.
WPA also includes a message integrity check feature to prevent
data packets from being hampered with. Only authorized network
users can access the wireless network.
The later WPA2 protocol features compliance with the full IEEE
802.11i standard and uses Advanced Encryption Standard (AES)
in addition to TKIP encryption protocol to guarantee better
security than that provided by WEP or WPA. Currently, WPA is
supported by Windows XP SP1.
PPPOE
The Point-to-Point Protocol over Ethernet (PPPoE) is a network
protocol for encapsulating PPP frames inside Ethernet frames.
Integrated PPP protocol implements authentication, encryption,
and compression functions that traditional Ethernet can not
provide and can also be used in the cable modem and digital
subscriber line (DSL) and Ethernet that provide access service to
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the users. Essentially, it is a protocol that allows to establish a
point-to-point tunnel between two Ethernet interfaces within an
Ethernet broadcast domain.
DNS
The Domain Name System (DNS) is a hierarchical
distributed naming system for computers, services, or any
resource connected to the Internet or a private network. It
associates various information with domain names assigned to
each of the participating entities. A Domain Name Service
resolves queries for these names into IP addresses for the
purpose of locating computer services and devices worldwide.
An often-used analogy to explain the Domain Name System is
that it serves as the phone book for the Internet by translating
human-friendly computer hostnames into IP addresses.
WDS
A wireless distribution system (WDS) is a system enabling
the wireless interconnection of access points in an IEEE 802.11
network. It allows a wireless network to be expanded using
multiple access points without the traditional requirement for a
wired backbone to link them. All base stations in a wireless
distribution system must be configured to use the same radio
channel, method of encryption (none, WEP, or WPA) and the
same encryption keys. They may be configured to different
service set identifiers. WDS also requires every base station to
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be configured to forward to others in the system. WDS may also
be considered a repeater mode because it appears to bridge and
accept wireless clients at the same time (unlike traditional
bridging).WDS may be incompatible between different products
(even occasionally from the same vendor) since it is not certified
by the Wi-Fi Alliance. WDS may provide two modes of wireless
AP-to-
AP connectivity:•
Wireless bridging, in which WDS APs
communicate only with each other and don't allow wireless
clients or stations (STA) to access them•
Wireless repeating, in
which APs communicate with each other and with wireless STAs.
DMZ
In computer security, a DMZ (sometimes referred to as a
perimeter networking) is a physical or logical subnetwork that
contains and exposes an organization's external-facing services
to a larger untrusted network, usually the Internet. The purpose
of a DMZ is to add an additional layer of security to an
organization's local area network (LAN); an external attacker
only has access to equipment in the DMZ, rather than any other
part of the network. Hosts in the DMZ have limited connectivity to
specific hosts in the internal network, although communication
with other hosts in the DMZ and to the external network is
allowed. This allows hosts in the DMZ to provide services to both
the internal and external network, while an intervening firewall
controls the traffic between the DMZ servers and the internal
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network clients. Any services such as Web servers, Mail servers,
FTP servers and VoIP servers, etc that are being provided to
users on the external network can be placed in the DMZ.

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